1. butachlor is an amide selective herbicide before germination. It is a selective pre-bud herbicide with systemic conduction, which inhibits protein synthesis in weeds through the absorption of buds and roots, thus leading to weed death. Butachlor can effectively control weeds before bud stage and two-leaf stage. The original drug is light yellow oily liquid, slightly fragrant, non-volatile at room temperature and good photolysis resistance. The leaching depth in soil is less than1~ 2 cm. After microbial degradation in soil or water, after about 65,438+000 days, the effective components can be degraded by more than 90%, so it has no effect on subsequent crops. Low toxicity to people and livestock. Slight irritation to human skin and eyes. Toxic to fish and aquatic organisms.

2. Prepare 50%, 60% emulsifiable concentrate and 5% granule.

3. Control object and application technology Butachlor is used to control gramineous weeds, some Cyperaceae weeds and some broadleaf weeds; Such as barnyard grass, crabgrass, buttercup, spurge, broken sedge, alien sedge, amaranth, thrifty vegetables and stranger service. Weeds in Gua Tian can be applied 1 ~ 2 days before emergence or transplanting, using 900 ~1500ml of 60% EC per hectare, spraying 750kg of water, and covering with plastic film after application.

4. Precautions ① Butachlor is effective against gramineous weeds before the two-leaf stage, but its control effect on Stellaria is poor. ② This product is flammable and cannot be stored under high temperature or open flame. ③ Irritant to eyes and skin, so attention should be paid to protection.

Herbicide. J.

(1) 2,4-butylate [English common name] 2,4-butylate is 5 rsth late. &

[chemical name] n-butyl 2,4-dichlorophenoxyacetate X-WvKH(=w

[Characteristics] 2,4-d-butyl ester is a selective herbicide for phenoxyacetic acid hormones. It has strong internal absorption conductivity. Mainly used for the treatment of stems and leaves after wheat seedling. After the liquid medicine is sprayed on the surface of the stems and leaves of weeds, it passes through the stratum corneum and plasma membrane and is finally transmitted to all parts of the plant. After the weeds were damaged, the stems and leaves twisted and eventually died. Generally, broad-leaved weeds will appear abnormal curling symptoms within 24 hours after application and die within 7- 15 days. B{u.Yc:

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Because of the differences in external morphology, tissue structure and physiology among plants, they show different resistance to 2,4-D. Generally, dicotyledons degrade 2,4-D slowly, so their resistance is weak and vulnerable, while Gramineae plants can metabolize 2,4-D quickly, making them lose their activity. Therefore, the drug has good selectivity between gramineous plant wheat and dicotyledonous weeds. I> zinc $d*0

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[Preparation] The commonly used preparation is 72% 2,4-butyl ester EC "QP _ * Y".

[Application Technology] 72% 2,4-Dibutyl EC was used to control broad-leaved weeds such as descurainia sophia, shepherd's purse, Chenopodium album, Polygonum hydropiper, Anemarrhena asphodeloides, Lysimachia christinae, Ixeris sonchifolia, Inula sonchifolia, etc. in wheat fields, but the control effect was poor. Appropriate application period and dosage: during the wheat turning green, 40-50ml of 72% 2,4-butyl ester EC and 25-30kg of water should be used per mu. 2,4-Dibutyl EC can be mixed with paraquat and bromoxynil. And the dosage is reduced by half, thus expanding the weeding spectrum. It should be noted that1.2,4-d butyl ester is highly volatile, and drug droplets can float far away in the air, causing harm to sensitive plants. Dicotyledonous crops, such as spinach, beans, cotton, rape and sunflower, which grow together with cereal crops are very sensitive to it, which is one of the main reasons for the phytotoxicity of broadleaf crops in China. Therefore, the application should be carried out in windless or windy weather, and it is best to put a protective cover on the sprayer nozzle to prevent the drug droplets from floating into the dicotyledonous crop field. This medicine is not suitable for interplanting sensitive crops in wheat fields. 2. Strictly control the application period and dosage. Wheat is sensitive to 2,4-dibutyl before 3 leaves and after jointing stage, and it is easy to cause wheat phytotoxicity at this time. The symptoms of phytotoxicity did not appear until after the heading stage of wheat. When the wheat is lightly heading, it shows that the wheat ear is bent and is not easy to be pulled out from the flag leaf, showing a "crane head" shape. In severe cases, the ears of wheat are deformed and become "square-headed" ears. Therefore, the drug should be applied after the three-leaf stage and before the jointing stage of wheat. 3. The equipment for subpackaging and spraying 2,4-butyl ester should be dedicated to avoid "secondary pollution". 4.2. 4- Dibutyl EC should not contact with acid and alkali substances, so as not to reduce the efficacy due to hydrolysis, nor should it be stored with seeds, fertilizers, etc. |n%N'-el

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(2)2 methyl 4 chloro aB_z4dqwU

[Chinese name] 2 methyl 4 sodium chloride J >；; M%？ Tw

[English common name] MCPA-na $ ~ \ qow

[Chemical Name] Sodium 2- methyl -4- chlorophenoxyacetate K6UA ~ n

【 Characteristics 】 The mode of action and selectivity are the same as those of 2,4-butyl ester. However, its volatility and action speed are lower and slower than that of 2,4-butyl ester EC. { 1c eF

[Preparation] 20% 2 methyl 4 sodium chloride salt solution and 56% 2 methyl 4 sodium chloride wettable powder J3F = P.

[Application Technology] The weed control spectrum of 2-methyl -4 sodium chloride is basically the same as that of 2,4- drip ... Suitable application period: in the peak tillering stage of wheat, 20% 2- methyl -4- chloro-4 sodium solution (250-300ml) is applied per mu, and 25-30kg of water is added, and the stems and leaves are evenly sprayed. Matters needing attention are the same as those of 2,4-d butyl ester GT0'bge.

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(3) dicamba KfS^sT

[Chinese name] dicamba 3g &；; mND

[English common name] dicamba 4'* K \ Ul). H

[other names] Herb enemy 3 ~' f = t.y

[Chemical Name] 3,6-dichloro -2- methoxybenzoic acid d_hcv|%

【 Characteristics 】 dicamba belongs to benzoic acid herbicide, which has the function of systemic conduction. The medicine is used for spraying after seedling, and is quickly absorbed by leaves, stems and roots of weeds, and is conducted up and down through phloem and xylem. The drug is mostly concentrated in meristem and parts with strong metabolic activity, which hinders the normal activity of plant hormones and leads to their death. It has obvious control effect on annual and perennial broadleaf weeds. Generally, broad-leaved weeds will appear abnormal curling symptoms within 24 hours after application, and die in 10-20 days. Mtu-\

Gramineae plants, such as wheat, can quickly undergo metabolic decomposition after absorbing chemicals, so they show strong drug resistance. sq$|Pad[

[Preparation] 48% paraquat dichloride aqueous solution.

【 Application Technology 】 dicamba was used to control descurainia sophia, Capsella bursa-pastoris, Chenopodium album, Anemarrhena asphodeloides, Stems of Buckwheat, Xanthium sibiricum, Dioscorea cirrhosa, Erigeron breviscapus and Equisetum arvense, but it had no control effect on Gramineae weeds. Suitable application period and dosage: from tillering to jointing stage, use 25-40ml of 48% paraquat dichloride per mu, add 20-30kg of water and spray evenly. In order to expand the weeding spectrum, paraquat can be mixed with other herbicides with different weeding spectrum. Like 2,4-D, it is forbidden to drift to the surrounding sensitive crops when applied in dicamba. Dicamba should not be used before the three-leaf stage and after the jointing stage to avoid phytotoxicity. b*i+uV？

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(4), bromobenzonitrile. s； /v - F

[Chinese common name] bromobenzonitrile1f/&; Y}X

[English common name] bromoxinil/jas` "u

[other names] Pardner) o6oYJ`PY

[Chemical Name] 3,5-dibromo -4- hydroxy -65438+ o-cyanobenzene +l\Dp

【 Characteristics 】 Bromobenzonitrile is a contact herbicide with selective post-seedling stem and leaf treatment. It is mainly absorbed by leaves, and its conduction in plants is extremely limited. By inhibiting various processes of photosynthesis, it quickly causes plant tissue necrosis. Within 24 hours after application, the leaves faded and necrotic spots appeared. Under the conditions of high temperature and strong light, the death of the blade is accelerated. @UX`9]-P

[Preparation ]22.5% Bandinon EC Ⅰ (

[Application Technology] Bromobenzonitrile was used to control descurainia sophia, shepherd's purse, Chenopodium album, Polygonum hydropiper, Polygonum aviculare, buckwheat vine, grandma's sodium, chickweed, potherb and so on in wheat fields. It has no control effect on gramineous weeds. Suitable application period and dosage: in the 3-5 leaf stage of wheat, when the broad-leaved weeds are in full bloom and vigorous growth before the 4 leaf stage, use 22.5% bromoxynil EC100-150ml per mu, add 25-30kg of water and spray evenly. The medicine can be mixed with 2,4- butyl ester or 2- methyl -4- chloro-sodium. Expand the scope of weed control. Compared with the single use of each drug, the mixed dose is halved. The drug is a contact herbicide with stem and leaf treatment, and the application period should be as early as possible. When the weed plants are large, the weeding effect is reduced. In addition, if there is rain after application, it should be sprayed again. Dqd & j @

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(5) Thifensulfuron F (9t; F

[Chinese name] Thifensulfuron ` 4MPXfoBL

[English common name ]thifensullon "d' @ IN

[Product name] Thifensulfuron, broad-leaf powder, Harmony $ fj7' @ 1 (

[Chemical name] 3-[(4- methoxy -6- methyl-1, 2,3- triazinyl -2- yl) amino carbon-based amino sulfonyl ]-2- thiophenecarboxylate methyl ester fi1uuj0u;

【 Characteristics 】 Thifensulfuron-methyl is a sulfonylurea systemic conductive post-emergence selective herbicide and an inhibitor of acetolactate synthase (ALS). After the drug is absorbed by the leaves and roots of plants, it inhibits the biosynthesis of branched-chain amino acids by inhibiting the acetolactate synthase of plants, thus inhibiting cell division and stopping the growth of plant meristem, and it dies 2-4 weeks after taking the drug. Wheat is resistant to thifensulfuron and is safe at normal dosage. Thifensulfuron is decomposed by aerobic microorganisms in the soil, and it is harmless to the growth of the next crop after 30 days. JydaF ~ & gt

[Preparation] 75% water-retaining water dispersible granule, 15% thiophanate-methyl wettable powder, etc. r0 >； L[ 1o

[Application Technology] Thifensulfuron is used to control broad-leaved weeds in wheat fields, such as Descurainia sophia, Capsella bursa-pastoris, Erigeron mairei, Kochia scoparia, Chenopodium album, Polygonum hydropiper, Polygonum aviculare, Grifola frondosa, Stellaria, etc. The drug has a good control effect on the wheat bottle grass which can not be controlled by 2,4-butyl ester. It has no effect on gramineous weeds. Suitable medication period and dosage: wheat can be used from seedling stage to booting stage. In order to save the application amount,1-3g of 75% water dispersible granules can be used for each mu of weeds in the 2-4 leaf stage, and 25-30kg of water can be added for uniform spraying. Attention should be paid to the application of this drug: 1. Weeds respond slowly to this drug. When used at low temperature, all weeds die more than 4 weeks after application, so there is no need to rush to weed artificially before seeing the weeding effect. 2. The drug has high activity and low dosage, and it should be made into mother liquor before being poured into the sprayer. At the same time, due to its strong activity, medical devices should be thoroughly cleaned in time after taking it. Working group, {:|! E

(6) bensulfuron-methyl x >；; 7T~4t

【 Chinese common name 】 tribenuron-methyl uv$y" 1'g

[English common name] Bensulfuron J.

[Product name] Superstar, Mai Lele, etc. r！ O'DM+

[Chemical Name] 3-(4- methoxy -6- methyl-1, 3,5-triazinyl -2- yl)-1-(2- methoxyformylphenyl) sulfonylurea XX =A 1#H

【 Characteristics of Action 】 Bensulfuron-methyl is a sulfonylurea systemic selective herbicide after seedling, and it is also an inhibitor of acetolactate synthase (ALS). After the drug is absorbed by the leaves and roots of plants, it inhibits the biosynthesis of branched-chain amino acids by inhibiting the acetolactate synthase of plants, thus inhibiting cell division and stopping the growth of plant meristem, and it dies 2-4 weeks after taking the drug. Wheat has strong resistance to tribenuron-methyl, which is safe at normal dosage. The residue period of the drug in soil is longer than that of thiophanate-methyl, and it is harmless to the next crop after 60 days. e？ V: Doctor.

[Preparation] Li' #

【 Application Technology 】 Bensulfuron-methyl is used to control broad-leaved weeds in wheat fields, such as descurainia sophia, shepherd's purse, ion grass, Chenopodium album, Polygonum hydropiper, Kochia scoparia, Polygonum aviculare, Maijiahong, Stellaria stellata, and pig's gizzard. It has good control effect on some broad-leaved weeds that 2,4-butyl ester can't control. It has no effect on gramineous weeds. Suitable medication period and dosage: 2 leaves to booting stage of wheat. There are two periods: autumn use and spring use. It is usually applied in autumn from the third leaf of wheat to the tillering stage in autumn. The dosage is 5-7.5g 10% tribenuron-methyl wettable powder per mu, and 25-30kg of water is added for spraying. In spring, the application was carried out from the turning green to booting stage of wheat, and the dosage was 7.5- 10% tribenuron-methyl wettable powder per mu, and 30-35 kg of water was sprayed. Bensulfuron-methyl is also very safe for wheat, and spraying from emergence to booting stage has no effect on wheat yield. Bensulfuron-methyl can be mixed with 2,4- butyl and 2- methyl -4- chloro-sodium to expand the weed control spectrum. Attention should be paid to the application of this drug: 1. Weeds react slowly to tribenuron-methyl, and all the weeds die after 4 weeks, so there is no need to rush to weed artificially before seeing the effect. 2. Bensulfuron-methyl should be used as soon as possible in wheat fields in double cropping rice areas, and weeds in spring should basically germinate before winter or be sprayed before March 20. If sprayed too late, the early growth of interplanting crops such as peanuts will be easily affected by pesticide residues in soil. ppxu\a

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(7) metsulfuron vR-/c

[Chinese name] Mesulfuron o_cj-

[English common name] metsulfuron-methyl _ m? :N:e

[Product name] Mesulfuron! ! 9V0[

[chemical name] methyl 2-(4- methoxy -6- methyl-1, 3,5-triazinyl -2- carbamoyl sulfamoyl) benzoate H'16 "j >;

[Characteristics] Isobensulfuron. The drug takes effect faster than tribenuron-methyl, but its residual effect in soil is longer, and it is still harmful to sensitive crops after 100 days. RxqXGM`4

[Preparation] 10% metsulfuron-methyl wettable powder, etc.

【 Application Technology 】 Metsulfuron-methyl is used to control broad-leaved weeds in wheat fields, such as descurainia sophia, shepherd's purse, Chenopodium, Ophiopogon japonicus, Kochia scoparia, Polygonum hydropiper, Polygonum aviculare, Gynura divaricata, Solanum lyratum Thunb, Cardamine japonica Thunb and so on. It is ineffective for most gramineous weeds. Suitable period and dosage: wheat can be used from 2-leaf stage to booting stage, but most crops in cultivated land are sensitive to this drug, so it is appropriate to use this drug in tillering stage before winter. Use 0.5g 10% metsulfuron-methyl wettable powder per mu, add 25-30kg of water and spray evenly. Attention should be paid to the application of this drug: 1. This product is limited to the Yangtze River valley and its south area, acidic soil (pH

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(viii) Chlorsulfuron-methyl

【 Chinese name 】 Chlorsulfuron qh=lF_%uj

[English common name] Chlorsulfuron ztf (. ~

[Product name] Chlorsulfuron Rk]; 2[U

[Chemical name] 1-(2- chlorobenzenesulfonyl) -3-(4- methoxy -6- methyl-1, 3,5-triazinyl -2- yl) urea K+&; |*! j

[Characteristics] Methsulfuron-methyl. The drug has a long lasting period in soil, and it is still harmful to sensitive crops after 100 days. /q8n_NR

[Preparation] 10% chlorsulfuron wettable powder and other $L? stgU

【 Application Technology 】 Chlorsulfuron-methyl is used to prevent and control broad-leaved weeds in wheat fields, such as descurainia sophia, shepherd's purse, Chenopodium album, Erigeron, Cardamine frutescens, Kochia scoparia, Polygonum hydropiper, Polygonum aviculare, Poa pratensis and Lolium perenne. It is ineffective for most gramineous weeds. Suitable period and dosage: wheat can be used from 2-leaf stage to booting stage, but most crops in cultivated land are sensitive to this drug, so it is appropriate to use this drug in tillering stage before winter. Use 10% chlorsulfuron wettable powder 1 g per mu and spray with 25-30 kg of water. Attention should be paid to the application of this drug: 1. This product is limited to the Yangtze River valley and its south area, acidic soil (pH

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(9) tribenuron-methyl c "YF"; 0

[Chinese name] Bensulfuron ethyl ether d >；; 05F，a

[English common name] trisulfuron QGfU:

[product name] _uL m! cool

[chemical name] 1-[2-(2- chloroethoxy) benzenesulfonyl) -3-(4- methoxy -6- methyl-1, 3,5-triazinyl -2- yl) urea ]] O < sX6a9e

[Characteristics] Isobensulfuron. The drug has a long lasting period in soil, and it is still harmful to sensitive crops after 100 days. |FH/Q-7[

[Preparation] 10% tribenuron-methyl wettable powder Kidd ]f

【 Application Technology 】 Bensulfuron-methyl is used to control broad-leaved weeds in wheat fields, such as Descurainia sophia, Capsella bursa-pastoris, Chenopodium album, Erigeron breviscapus, Corydalis tricolor, Cardamine japonica, Kochia scoparia, Polygonum, Polygonum aviculare and Poa pratensis. It is ineffective for most gramineous weeds. Suitable period and dosage: wheat can be used from 2-leaf stage to booting stage, but most crops in cultivated land are sensitive to this drug, so it is appropriate to use this drug in tillering stage before winter. Use 0.75-10% tribenuron-methyl wettable powder per mu, and add 25-30kg of water for spraying. The medicine should be used as soon as possible when it is applied, and it should be sprayed evenly, and it should not be sprayed again or applied excessively. This medicine should be used with caution in wheat fields of sensitive crops such as soybeans and corn in the north of the Yangtze River. Rom | Bqo

B2VUH. Yes.

(10) sulfuron x # ivjc: L

[Chinese name] Sulong JQ! D8Ut

[English common name] amidosulfuron Wk`G+VR+

[Product Name] Costco and Scooter |0BmEF

[chemical name]1-(4,6-dimethoxypyrimidine -2- yl) -3- methylsulfonyl (methyl) sulfonylurea rJ K~kKG

【 Characteristics 】 Sulfonylureas are systemic and conductive post-seedling selective herbicides and inhibitors of acetolactate synthase (ALS). Weed leaves stop growing, turn green, and then die after absorbing chemicals. The residue period of this drug in soil is short and generally does not affect the growth of the next crop. H"6:！ ; 9,

[Preparation] 50% all-solid water dispersible granules 27}k63\

【 Application Technology 】 Monosulfuron-methyl was used to control broad-leaved weeds in wheat fields, such as descurainia sophia, Capsella bursa-pastoris, Lepidium chinense, Polygonum hydropiper, Polygonum aviculare, Polygonum aviculare and chicory. It has no effect on gramineous weeds. Suitable period and dosage: wheat can be used from 2 leaves to booting stage, especially from before winter to tillering stage in spring. Use 3-4g of 50% Quanbang water dispersible granules per mu and spray 25-30kg of water. Drugs should be used as soon as possible, and when weeds are old or the weather is dry and there is no watering condition, the dosage should be increased appropriately. h； %a 1

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(1 1) metsulfuron-methyl, @ 8 >; =rT

[Chinese name] sulfasulfuron %#Fd0L

[English common name] Methsulfuron-methyl 0; M+8

[product name] Shima O0 _ ru < bWN

[Chemical Name] Methyl 2-(4,6-dimethoxypyrimidine -2- aminoacylaminosulfonyl) -a- (methylsulfonylamino) p-methyl benzoate. FQ $ 7y} 7

【 Characteristics 】 Sulfonylureas are systemic and conductive post-seedling selective herbicides and inhibitors of acetolactate synthase (ALS). Weed leaves stop growing and die gradually after absorbing chemicals. The residue period of drugs in soil is short, which does not affect the growth of the next crop. 7{2knm^

[Preparation] Shima 3% oil suspending agent ts aD5B

【 Application Technology 】 Metsulfuron-methyl is used to control common gramineous weeds in wheat fields, such as Bromus, Aegilops tauschii, Lolium perenne, Poisonous Wheat, Miscanthus reticulata, Milkweed, Hard Grass, Kentucky Bluegrass, Crotalaria, Suaeda salsa, Wild Oats and so on. But the control effect on most broad-leaved weeds is poor. The drug can be mixed with broad-leaved weed control agent to expand the weed control spectrum. Suitable application period and dosage: before the 2-4 leaf stage of wheat and the 3-leaf stage of weeds, 25-35 ml of Shima 3% oil suspension concentrate and 25-30 kg of water are sprayed per mu. Drugs should be used as soon as possible, and when weeds are old or the weather is dry and there is no watering condition, the dosage should be increased appropriately. Wheat should not be used after jointing. :; #Kg_bz

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(12) carfentrazone 2 *

【 Chinese name 】 carfentrazone W:ih#YW_F

[English common name] Cavengt pine-ethyl G

[other names] Kuai Ling ==l p\

[Chemical Name] (RS)-2- chloro -3-[2- chloro -5-(4- difluoromethyl-4,5- dihydro -3- methyl -5- oxy-1h- 1, 2,4- triazole-6544.

【 Characteristics 】 Clofenuron is a triadimefon contact selective herbicide. Inhibition of protoporphyrin oxidase in chlorophyll biosynthesis leads to the accumulation of toxic intermediates, destroying the cell membrane of weeds, making leaves dry and die quickly. The drug was quickly absorbed by plants within 15 minutes after being sprayed on plant stems and leaves, and was not affected by rain leaching, and weeds showed poisoning symptoms in 3-4 hours. Weeds in wheat field responded quickly to mirex, and the effect was obvious 15 days after application. % Lhpj[C

[Preparation] 40% Kuaimieling water dispersible granules

[Application Technology] Kuaimieling is used to control broad-leaved weeds such as descurainia sophia, Capsella bursa-pastoris, Chenopodium album, Polygonum cuspidatum, Kochia scoparia, soda, bowl flower, and sonchus sonchifolia in wheat fields. Suitable application period and dosage: the best application period is the 2-3 leaf stage of weeds, and the lower the grass age, the better the effect. The suitable dosage is 4-5g of 40% Kuaimieling water dispersible granules per mu, and 25-30kg of water is added for spraying. The medicine can be used for wheat from emergence to booting stage. It can also control broad-leaved weeds resistant to ALS enzyme in wheat fields. It is easy to decompose in soil and does not affect the growth of subsequent crops. Note: 1. Kuaimieling is an ultra-efficient herbicide, and the dosage must be accurate when applying it. It is best to make the pesticide into mother liquor and then add the sprayer. Spraying should be uniform, and repeated spraying is not allowed, so as not to cause serious phytotoxicity to crops. 2. Kuaimieling has only contact killing effect on weeds, and has no soil sealing effect, so it should be applied as far as possible after most weeds in the field emerge. 3. After spraying wheat from jointing stage to booting stage, yellow spots will appear on the leaves, but they will return to normal green after 1 week, which will not affect the yield. 4. Spraying drugs that kill the spirit too fast should be thoroughly cleaned to avoid drug residues and other crops. jxm.x[ 1ki^

(13) fenoxaprop-p-ethyl 5R7LWWZ

【 Chinese Name 】 Fenoxaprop-p-ethyl

【 English common name 】 fenoxaprop-p-ethyl BOQ2@:3

"Product name" Ma Xu, Wei Ba HHM &；; u^xY

[chemical name ](r)-2-[4-(6- chlorobenzoxazole -2- phenoxy) phenoxy] ethyl propionate No=Ig-It

[Characteristics] Acetyl-CoA carboxylase inhibitor. It is a post-seedling stem and leaf treatment agent with selective internal absorption and conduction. After being absorbed by plant stems and leaves, pesticides are transferred to root growth points, tips and meristems, and quickly converted into phenoxy free acids, which inhibits acetyl-CoA carboxylase, thus inhibiting fatty acid biosynthesis and destroying weed growth points and meristems. This medicine takes effect quickly. A week later, the inner leaves of the weed turned green and purple, the meristem turned brown, and the whole plant died after the leaves turned purple. Drug-resistant crops are decomposed into inactive metabolites in the body. )! SVV~y

[Preparation] 6.9% water emulsion, 10% emulsion bjmUU6VLT.

[Applied Technology] Ma Xu was used to control milkweed, Japanese milkweed, wild oat, hard grass and nettle in wheat fields. But the control effect on brome is poor, and it is ineffective on broadleaf weeds. The drug can be mixed with broad-leaved weed control agent to expand the weed control spectrum. Suitable application period and dosage: Before the 3-leaf stage of weeds in the 2-4 leaf stage of wheat, 45-60ml of 6.9% Ma Xu emulsion in water and 25-30kg of water should be sprayed per mu. The drug should be used as soon as possible, and the drug resistance of weeds increases after tillering, and the control effect is poor. Wheat leaves will turn yellow slightly when treated at low temperature, and then return to normal with its growth. bc } U & ampX & lt

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(14) propargyl (` 5no: v <

"Chinese common name" propargyl "CapP:

【 English common name 】 propargyl @ kd 1 | k

"Product name" propiolic acid, top Z3

[Chemical name ](R)-2-[4-(5- chloro -3- fluoro -2- pyridyloxy) phenoxy] propargyl propionate MUh)

[Characteristics] Acetyl-CoA carboxylase inhibitor. It is a post-seedling stem and leaf treatment agent with selective internal absorption and conduction. After the drug is absorbed by plant leaves and leaf sheaths, it is transferred to meristem, which inhibits acetyl-CoA carboxylase, thus inhibiting fatty acid biosynthesis and eventually leading to weed death. Drug-resistant crops are decomposed into inactive metabolites in the body. ]tA39JK-i

[formulation] 15% top-grade wettable powder [cloquintocet-mexyl mixed with 1: 4] PSPH [DB

【 Application Technology 】 top was used to control barley grass, wild oats and Kentucky bluegrass in wheat fields, but it had poor control effect on brome and was ineffective on broadleaf weeds. The drug can be mixed with broad-leaved weed control agent to expand the weed control spectrum. Suitable application period and dosage: before the 2-4 leaf stage of wheat and before the 3 leaf stage of gramineous weeds, spray 15% top wettable powder14-17g per mu and add 25-30kg of water. The drug should be used as soon as possible, and the drug resistance of weeds increases after tillering, and the control effect is poor. IHZ WNT2

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(15) azoxystrobin Q#wASd.

[Chinese name] Zosulfuron-methyl ~ O；; ! y%

[English common name] flumetsulam R"Nvnpm

"Product name" wide hit M (,vym t)

[Chemical Name] 2', 6 '- difluoro -5- methyl (1, 2,4) triazolo (1, 5-a) pyrimidine -2- sulfonyl aniline PWU}

【 Characteristics 】 Zosulfuron-methyl is a sulfonamide systemic conduction herbicide, which is absorbed by the roots and leaves of weeds, conducted by xylem and phloem, accumulated in plant meristem, inhibited acetolactate synthase in plants, stopped the biosynthesis of branched-chain amino acids-leucine, valine and isoleucine, and blocked the synthesis of protein, leading to plant growth stagnation and eventually death. It is a slow process from the absorption of bensulfuron-methyl by plants to the symptoms of plants until the death of plants. The typical symptoms of weeds after absorbing azoxystrobin are: the midvein of leaves is green, the veins and tips of leaves are brown, turning yellow and white from the heart leaves, turning purple, shortening internodes, death of terminal buds, and finally death of the whole plant. The selectivity between crops and weeds is due to the rapid degradation and metabolism of wheat, a resistant crop, which makes its activity lose, thus ensuring the safety of crops. In sensitive weeds, this metabolism is very slow, thus killing weeds without harming crops. %Qgo0

[Preparation] 80% broadleaf clear water dispersible granule 7te' # "

【 Application technology 】 It can effectively control broad-leaved weeds such as shepherd's purse, descurainia sophia, Chenopodium album, Polygonum cuspidatum, Kochia scoparia, Xu Changqing, Stellaria, Pennisetum and leek. Suitable application period and dosage: in the period of vigorous weed growth in autumn or wheat turning green in spring, apply 2-3g of 80% broad-leaved clear water dispersible granules per mu, and add 25-30kg of water to spray evenly. Pay attention when using: 1. Rape, sugar beet and cotton are sensitive to the drug, so attention should be paid to prevent the liquid from drifting to these sensitive crops when applying the drug, and the drug should be banned in the wheat field where the sensitive crops are planted in the next crop. 2. Broadleaf grass is an ultra-efficient herbicide, and the dosage per unit area is very low, so the dosage should be accurate. It is best to prepare the mother liquor first, then dilute it with water and spray it evenly. When mixed with other herbicides, first add 1/4 water into the sprayer, then add the broadleaf mother liquor, and then add other herbicides, and stir evenly. 3. Broad grass green should be sprayed when the sunshine is sufficient and the temperature and humidity are suitable. Under the condition of drought and cold, the weeding effect of this drug will decrease. Adding vegetable oil and nonionic surfactant can improve the weeding effect. 3Q*K+(`{

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(XVI) fluroxypyr

[Chinese name] fluroxypyr

[English common name] fluroxypyr uBXSP#

[Product name] Fluorouracil, Chlorpyrifos and Ma Song H$au02dpU.

[Chemical name] 4- amino-3,5-dichloro -6- fluoro -2- pyridyloxyacetic acid A (X ~ PP&; about

【 Characteristics 】 fluroxypyr is a pyridine-based systemic conductive herbicide. Pesticides were quickly absorbed by plant stems and leaves, and symptoms similar to hormone herbicides appeared. In wheat, drugs can be combined and inactivated. & ltZ{\3X^

[Preparation] 20% Chlorhexidine EC hAi50qz

[Application Technology] Chlorhexidine has a good effect on shepherd's purse, descurainia sophia, Chenopodium album, Polygonum cuspidatum, Kochia scoparia, Commelina communis and Swertia japonica. Japan is a medicine. Chinese cabbage, bowls of flowers, etc. Suitable period and dosage: in the period of vigorous weed growth in autumn or wheat turning green in spring, 50-60ml of 20% chlorhexidine EC should be applied per mu, and 25-30kg of water should be added to spray evenly. Attention should be paid to the use: the drug should be used as far as possible when weeds are young, because weed plants greatly affect the weeding effect. \! J {& Xijie Group

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(17) green Long Mai y5B4t6M (

[Chinese name] Chlorotoluron /f~ V(DK

[English Common Name] Green Melon YdX# `

[Chemical Name] N, N-, N- dimethyl -N '(3- chloro -4- methylphenyl) urea J7W]Str

【 Characteristics 】 Chlorotoluron is a selective systemic conduction herbicide, which can replace urea. The pesticide is mainly absorbed by plant roots, which has contact killing effect on leaves, so it is an electron transfer inhibitor of plant photosynthesis. After three days of application, the weeds began to show symptoms of poisoning, the leaves faded, and the tip and heart leaves turned green one after another. 10 days or so, the whole plant withered and died, and the validity period in soil was more than 70 days. K Art4+3 1

[preparation] 25% chlorotoluron WP pE@Q (9`b{

【 Application Technology 】 Chlorotoluron is used to control many gramineous weeds and some broad-leaved weeds in wheat fields, such as milkweed, wild oats, Chenopodium album and Stellaria straminea. Suitable period and dosage: from the emergence of wheat after sowing to the 2-leaf stage of wheat seedling and before the weed 1-2-leaf stage. Apply 300g of 25% chlorotoluron wettable powder per mu, and add 40-50kg of water for spraying. Note: 1. Only by keeping the soil moist before and after the application of chlorotoluron can the ideal drug effect be exerted. qFp }+s

2. The medicine should be sprayed evenly. If the application is uneven, the crops will be slightly damaged and slightly yellow, and they will return to normal growth in about 20 days. Mi -S4! bill of lading

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(18) isoproturon; W，XP#{W

【 Chinese name 】 isoproturon ~ K】5 `( KV

[English common name] isoproturon P, lKa.

[Chemical Name] n-4- isopropylphenyl -n', n '- dimethylurea fBBNP)

【 Characteristics 】 Isoproturon is a selective systemic conduction herbicide instead of urea. The drug is mainly absorbed by the roots of plants, and is transmitted upward to the leaves with water in the catheter, which inhibits the photosynthesis of green plants. Weeds damaged by drugs turn green and yellow at the tip and edge of leaves, and finally die. ，& lts'/8Ik

[Preparation] 50% isoproturon wettable powder, 75% isoproturon wettable powder ce-5XqzY@

【 Application Technology 】 Isoproturon is used to control annual gramineous weeds and broad-leaved weeds in wheat fields, such as oat, Kentucky bluegrass, nettle, hard grass, chickweed, maijiahong, rice stubble, Polygonum hydropiper, descurainia sophia and Chenopodium album. The most suitable application time of isoproturon is from before the emergence of weeds to before the third leaf stage, and the dosage is 50% isoproturon wettable powder125-300g per mu, with 30-40kg of water spraying. Isoproturon can be mixed with herbicides such as tribenuron-methyl to kill broad-leaved weeds, thus expanding the weeding spectrum. When using this medicine, we should pay attention to: 1. Only by keeping the soil moist before and after application can the ideal drug effect be exerted. When the soil is dry, the dosage should be increased. 2. Spraying should be uniform. If the application is uneven, the crops will have slight phytotoxicity. 3. After applying isoproturon, the early growth of wheat seedlings will be affected to some extent, which shows that the leaves of wheat seedlings turn yellow and the plant height decreases. It can be recovered with the growth of wheat in the future. Spraying plant growth promoters can alleviate the symptoms of phytotoxicity.