1, green leafhopper with small fruit and artificial eyes: this insect mainly sucks juice from tea twigs by adults and nymphs, and female adults lay eggs on the twigs, which hinders the growth of tea trees, makes damaged buds and leaves curl and harden, and makes the tip and leaves brown and scorched. In low mountain tea areas, the pest occurs once a year 12- 13 generations, and the damage peaks are May-June and September-1October. The insect occurs 8-9 generations a year in alpine tea area, and the peak period is July-September. Overwintering as adults on tea trees, beans and weeds. Most adults lay eggs on the tender stems between the second and third leaves of the new shoots. Control methods: (1) Strengthening the management of tea garden, clearing weeds in the garden in time and picking in batches can reduce the number of eggs, worsen the nutrition and reproduction conditions and reduce the harm. (2) In serious tea gardens, the population base of overwintering insects is large, so it is necessary to spray 50% phoxim or malathion 1000 times from the end of/kloc-0 to the middle of March next year to eliminate the overwintering insects. (3) In the picking season, according to the forecast of insect situation, before the peak period of nymphae, the biological pesticide Tianba 1000 times or 80% dichlorvos 2000 times or 98% Bataan 1000 times-1500 times should be selected.

2. Tea mites: Tea mites are important pests on tea trees, second only to leafhoppers. Because of its small size, it is generally difficult for the naked eye to detect, and it needs to be observed clearly under a magnifying glass of 10 times. The main species occurring in our city are tea orange gall mite, tea gall mite, tea short beard mite, coffee claw mite and lateral polyphagous mite.

3. Tea orange gall mite: common in our city. Adults and nymph mites mainly suck the juice of adult leaves and tender leaves, which makes the injured leaves turn yellow-green, the main veins turn reddish-brown, lose luster, brown fine stripes appear on the back of leaves, and the bud leaves shrink. Adult mites are yellow or orange-red, carrot-shaped, and have two pairs of feet in the front of the body. Young mites and young mites are light yellow to light orange. The insect has more than 20 generations a year, and the population is mainly distributed in the upper adult leaves and bud leaves. In the environment of high temperature, drought, heavy rainfall and long rain period, the number of insects in tea garden is small and the harm is light. There are two obvious peak periods throughout the year, the first is in May-June, and the second usually occurs after the high temperature and drought period. Control methods: ① After autumn tea, spray Bomei 0.5-degree sulfur mixture before the end of June 165438+ 10 to reduce the population base of overwintering insects. ② Multiple picking in batches can reduce the insect population. ③ Spray 20% pyridaben or 15% mirex 2000-3000 times or 25% chlorpyrifos 800- 1000 times before the peak period.

4. Acaricide: also known as acaricide and acaricide. Adults and nymph mites perched on the back of tea bud leaves to suck juice, and the back of the injured leaves appeared rust color, hardened and thickened, and the tip of the leaves was twisted and deformed. Bud leaf atrophy. The mite has 20-30 generations a year, and the female adult mite remains in bud leaves, scales and petioles. Wintering in cracks and weeds. The high temperature and dry climate environment is conducive to its occurrence. Generally, tea is more serious in summer and autumn. Control method: refer to tea orange gall mite.