In the late summer and early fall, when the temperature dropped, the occurrence of most pests rebounded, and even major outbreaks were discovered. Lights affected the yield of autumn tea, and severely affected tree vigor and spring tea production the following year. Therefore, prevention and control work must be done well. At the end of summer and early fall, common pests are mainly small-leaved leafhoppers, teat moths, black-spotted moths and other pests.
First, the habits and hazards of major pests
1, false eye small green leafhopper
Small green leafhoppers occur in all districts of our city and take a long time to occur. Adult worms and nymphs suck sap, and the growth of infected shoots is hindered. In severe cases, shoots are coked. There are two peak periods in one year, and the second peak is from late September to mid-October, especially when old tea gardens are reformed to maintain tea plants or The overgrown tea plantation is serious and it is hoped that the majority of key tea farmers will be highly valued.
2. Tea black poison moth
Tea black tussock moth is serious in the local tea area, especially in the latent area, pay attention to the observation of insects, a large number of larvae can shed all the leaves of the tea tree leaves, a greater impact on the growth of tea and tea yield, the year of the worm Four generations occurred. The fourth generation larvae took place from late August to late September. It was an autumn tea. The growing larvae were generally distributed on the upper layers of tea trees. They liked to eat fresh leaves. The 4th and 5th instar serial insects had a pseudo dead nature, and they curled up after being frightened. Falling to the ground. When the larvae are mature, they climb to the base of the tea bushes, and fall down between the fallen leaves or the soil gap.
Second, control methods
1. Control of small green leafhoppers: (1) Timely picking in batches; (2) Spraying 10% imidacloprid 15-20 g/mu, 70% imilan 2-3 g/mu, 35% Saitan oil 1000 times, 98% Bataan 1000-1500 times;
2. Control black tea venom moths: (1) Use black tea tussock moths to suspend and drop and kill them, 98% Bataan 1000-1500 times liquid; (2) Poisonous sand method.
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