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一是无公害农药的品种选择。面对琳琅满目的农药市场,应看重产品的有效成分及含量,要到有技术依托的正规销售点购药,选购那些质量比较稳定、信誉比较好的产品,并接受技术人员的指导。二是按植株的作息规律施药。蔬菜作物光合产物70%是在上午合成的,前半夜光合产物运转到根茎部,后半夜以呼吸为主,药剂对植物的光合和
First, the selection of pollution-free pesticides. The face of an array of pesticide market, should pay attention to the active ingredients and content of the product, to the technical point of relying on the regular point of purchase of drugs, those who buy more stable quality, better reputation products, and accept technical guidance. Second, according to the rules of plant rest application. 70% of the photosynthetic products of vegetable crops are synthesized in the morning. The photosynthetic products in the first half of the night run to the roots and rhinos, and the latter part of the night is mainly in respiration. The photosynthetic and