Pest performance
Leaf beetles are everywhere in the tropics. But this pest can also occur in summer in China. Everyone should be careful. They often bite the leaves, which makes them unrecognizable and destroys the ornamental effect of Hu Yanhua.
Prevention and cure method
Manual capture plus chemical control. If you find a beetle, kill it immediately. Spraying chemicals on plants to prevent larvae from growing and harming plants. These chemicals can be sprayed with 2.5% Dixie 3000 times solution.
Common pests of Cynanchum paniculatum: Noctuidae.
Pest performance
Hiding during the day, exercising at night, 1-2 years old eating mesophyll, 3-4 years old gnawing at the edge of leaves, biting into nicks, 5-6 years old overeating, and even eating all the leaves. This insect plays dead, and its larvae have the habit of burying the soil. Rainfall is favorable, but heavy rain or cold air intrusion is unfavorable.
Prevention and cure method
The optimum growth temperature of Spodoptera exigua is 15-25, which can be sprayed in the evening or morning. You can also use 2.5% trichlorfon powder, 5% fenthion powder 22.5-30kg/ha, 90% trichlorfon crystal 1000- 1500 times, and 50% dichlorvos emulsion 1000-2000.
Common pests of tiger-striped flowers: snails
Pest performance
Eat new buds, leaves, buds and roots at night. 6- 10 month, timely prevention and control should be carried out in wet environment. 0 10~ 10 10, lime powder can be sprayed on the ground, or 8% Miwolin granules can be sprayed on the affected parts, or pesticides such as trichlorfon can be sprayed on the leaves.
Prevention and cure method
Common pests of tiger flowers: slugs
, also known as scuba, some areas in southern China called scuba, commonly known as slug. It is a mollusk that forms a door with some snails. Androgyny looks like a snail without a shell, and its body surface is wet, sticky and disgusting.
Pest performance
This is a popular method, which is to sprinkle salt on the slug to dehydrate it and die. This is cruel, but who let it hurt our national first-class protected plant Hu Yanhua!