Application of Biopesticides in Tea
At present, the tea market, especially tea exports, has a high quality and safety requirement for tea. Biological pesticides, including microbial pesticides and botanical pesticides, do not cause pollution to tea and the environment. They also have low toxicity to humans and livestock and do not constitute residual drugs. Therefore, they are suitable pesticides for producing green food tea. In the current production of A-grade green food tea, especially organic tea and AA grade green food tea, the use of the following biological pesticides is worth promoting. Rotenone. Also known as gutlet, it is a plant-derived insecticide with a long history of application. Easy to decompose in the air, low residue, friendly to the environment. It has contact and stomach poisoning effects on pests. Its broad insecticidal spectrum, short duration, usually 5 to 6 days, only 2 to 3 days in summer sunlight. It can be used for the production of Class A green tea, control tea aphids, tea caterpillars, tea silkworms, leaf roller moths, codling moths, moths, small green leafhoppers, blackthorn mealybugs, tea alum, with 2.5% rotenone EC150~250mL per 667m2, Diluted with water to 300 to 500 times liquid spray. This pesticide cannot be mixed with alkaline pesticides. Rotenone is highly toxic to fish and should be used to prevent contamination of fish ponds. Matrine. Also known as oxymatrine, it is an alkaloid preparation made from the roots of Chinese herbal Sophora flavescens and fruit extracted with an organic solvent such as ethanol. Easy to degrade in the environment, almost no residue. Prevention of black tea moth, tea caterpillar, in the 1st, 2nd instar larvae, or egg hatching peak, every 667m2 with 0.2% matrine AS50 ~ 75mL, add water 50 ~ 75L, diluted into 1000 ~ 1500 times liquid spray. It can be used in organic tea gardens to control tea worms. Before the 3rd instar larvae, EC was killed with 3.2% insects per 667m2. Shower Commode,Stainless Steel Commode,Steel Stacking Commode ,Mobility Wheeled Commode Chair Active Life Healthcare Co.,Ltd , https://www.alh-med.com