September tea tree should pay attention to prevention and cure
Also known as arch arch worms, tea worms are one of the main leaf-feeding pests of tea plants. In September, the damage to autumn tea was more serious. The larvae bite into the leaves and arc the nicks. The severely occurring leaves are all eaten and only the bald branches are left, seriously affecting the yield of tea leaves. When it is found that tea scales are harmful, appropriate prevention and control measures can be taken according to the actual conditions of the garden.
1. Protecting natural enemies in tea gardens should minimize the number of medications and reduce the amount of pesticides to protect natural parasitic and predatory natural enemies and give full play to the control of natural enemies.
2. Virus-spraying tea virus nuclear polyhedrosis virus has a strong susceptibility rate to Apochaera larvae. In the 1st and 2nd instar larvae stage, a nuclear polyhedrosis virus is sprayed on the tea planthopper, and the dosage per acre is 10-50. Billion polyhedra.
3, light trapping in the tea scales adult stage can be installed in the field frequency trap type insect killing adults, reduce the generation of the next generation of larvae.
4. Manual killing For insect pests that are lighter and concentrated on the local hazards of the tea plantation, manual killing can be performed in conjunction with the daily management of the tea plantation.
5, put the chicken chicken worms eat, but also eat larvae. During the larval period, the tea bushes vibrate, causing the larvae to droop and cause the birds to feed.
6. Prevention and control of pesticides Pesticides should be strictly controlled according to prevention and control indicators. The prevention and control index of adult tea plantation production is 4,500 larvae per mu. Appropriate application of pesticides in the 3rd instar larval stage. The spraying method is suitable for spraying with low-volume awnings. Pharmacy selection: organic tea garden or green food AA grade tea garden can use 2.5% rotenone 150 ~ 200 ml, or 0.36 matrine 50 ~ 75 ml, water spray control. Green food Grade A and pollution-free tea gardens can use 35% Sai Dan 80-100 ml, or 1% abamectin (20-25 ml per mu, should be used in cloudy or sunny evening) Prevention.
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