The scientific and rational use of biological pesticides can not only play a role in the prevention and control of pests and diseases, but also protect the biological chain and the ecological environment. Today, the pesticide network Xiaobian teaches you how to use several biological pesticides:
Rotenone is also known as Shi Lvbao. It has a certain repellent effect on contact and stomach toxicity. It is safe for natural enemies and has a wide spectrum of insecticides. It has good control effects on various pests such as Lepidoptera, Hemiptera and Coleoptera. For example, aphids can be sprayed with 2.5% rotenone emulsifiable concentrate 400-600 times.
Kejiakang is also known as mesomycin. It has high activity against bacterial diseases and some fungal diseases of crops. Pesticide manufacturers are recommended for the control of grape anthracnose, black bean disease, apple ring disease, anthracnose disease, spotted leaf disease, mildew disease, etc., such as the control of grape anthracnose, can be used in the early stage of the disease with 3% gram bacteria 1000-1200 times liquid Spray, a total of 3-4 times.
Saponin Nicotine is a broad-spectrum insecticide prepared from saponin and nicotine, which is resistant to rain. It can be used to control red spiders and scale insects. For example, in the prevention and control of scale insects, in the early stage of egg hatching, use 27% saponin nicotine 300 times solution, once every 5-7 days, even spray 2-3 times.
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