The awareness of drug use to prevent phytotoxicity must be strengthened in tea gardens
In recent years, with the increase in the variety of pesticides , users have become more and more aware of pesticides. Strengthening the spraying of pesticides and preventing phytotoxicity is also receiving increasing attention from humans. If prevention of phytotoxicity should start from various aspects, take comprehensive preventive measures:
Strictly follow the indicators. Try to reduce the number of medications and avoid rushing to see the disease. For tea gardens where the density of the insects and the disease index exceed the control index, for example, the bud of the tea line is 5% or the egg bud is 20%, the tea caterpillar has 7000-9000 heads per acre, and the tea leafhopper is 10-15. When the head is in use, pesticide control can be used.
It is strictly forbidden to use high-toxic and high-residue pesticides such as methamidophos, methyl parathion, imipenem, dicofol and fenvalerate.
Use the correct method of application. Spray is a common method. From high-volume spray to low-volume spray, it not only improves the control effect, but also reduces the occurrence of phytotoxicity. The poison bait can be placed at 3-4 cm of the hole of the underground pest damage, trapping it; The hole is a kind of application method for preventing and controlling the pests of the cockroaches. After the cotton balls are immersed in the dichlorvos, the insects are immersed in the wormholes to kill the pests; the root zone is applied under the soil, and the ethyl phosphate aluminum 100-150 times liquid or benomyl 1000 can be used. Double liquid irrigation and so on.
Scientific with pharmaceutical liquids. Accurately master the dose and concentration, the dosage of the liquid should be used, and the syringe should be used for pumping. It should not be poured randomly; the powder should be packed into small packets according to the area of ​​the drug; the wettable powder should be prepared into a paste and formulated into a mother liquor. Dilute with water to ensure the quality of the application. It is necessary to take the liquid to the control site, and beware of heavy spray, especially pay attention to the use of pesticides under high temperature, high humidity and strong light conditions. Do not be able to cure the same problem, can not cure the rule of governance.
Pay attention to the safety interval. For example, 300-500 times of BT preparation can be used to control tea caterpillars, tea mites, tea black moths and tea leaf curling moths, and the safety interval is 3-5 days; using 0.2% matrine water agent 1000-1500 times liquid to control tea caterpillars, Tea black moth, tea leaf curler, safe interval of 5 days; phoxim safe interval of 10 days. Pay attention to the rotation of drugs, each pesticide can only be used once during the tea-picking period. This will prevent the development of resistance to pests and diseases and reduce residues.
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