How to prevent the phytotoxicity of long-lasting pesticides

Chemical herbicides are generally stable compounds. Because of their structural stability, there is residual drug effect in the period after use. This pesticide is a long-lasting pesticide. If you do not know the nature of the pesticide, the later crops such as sugar beet and flax are highly susceptible to phytotoxicity.

The long-lasting pesticides currently applied to the crops are mainly caused by soybeansulfuron and Puschte. In the soybean field using soybeansulfuron, flax and sugar beet can be planted in 4 years, while sorghum, millet, corn and wheat can be planted in the third year. In the second year, only soybeans can be planted. For example, corn and wheat also have residual phytotoxicity. . Puschte used in soybean fields that year, and can be planted in four years before the cultivation of grass and beet, wheat, corn and other grass crops. The plots of the above two pesticides should not be planted for 4 years, such as vegetables, watermelons, melons, etc., and can not be used in the bed soil of rice seedling beds. In addition, the crops planted here in the second year after the use of chlorhexidine will appear "whitening" phenomenon, and in the third year, it is necessary to plant flax, wheat, corn, etc. after one year.

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