Rational selection of drugs to prevent crop injury
As the weather gets warmer, as the crop grows and grows, the use of pharmaceuticals also increases, and various types of phytotoxicity phenomena are also commonplace. Some dominant phytotoxicity performances are lighter, and crops can resume growth within a short time. For example, the phytotoxicity of ethoxyflorin in the growing period of garlic is mostly burning withered white spots, as long as the growing point of garlic is not damaged. Conditioning generally restores growth. However, if 2,4-D butyl herbicides are misused in broad-leaved crops such as vegetables, cotton, and peanuts, the leaves will be distorted into chicken feet, which will inhibit crop growth, and in severe cases it will result in severe reductions in yield or yield.
The dark spots and dark spots that appear before and after maturing of the fruit of the bagged fruit tree are in most cases the improper type or quality of the sprayed fruit during the young fruit period, causing the fruit skin to be wounded and providing invasive channels for some parasitic bacteria. Black or brown spots are formed on the fruit surface. The use of 2,4-D-butyl ester in large doses after jointing of wheat may cause disruption of wheat ear differentiation, and wheat ears often appear distorted after heading. The use of tribenuron-methyl in large doses may also cause hidden phytotoxicity to the peanuts in the lower jaw, and may cause symptoms such as slow growth of the peanuts and short roots.
Many pesticides, especially herbicides, tend to have more pronounced sensitivities to certain crops or crops at a certain stage of their development. For example, Peach is sensitive to copper preparations, dichlorvos, trichlorfon, dimethoate, muscarinic, etc., peanuts are sensitive to sulfonylurea herbicides such as tribenuron, metsulfuron, wheat is sensitive to chlorpyrifos, atrazine, melons The class is sensitive to fluorosiliconazole, propiconazole and the like. Some inferior drugs are also particularly vulnerable to phytotoxicity in crops that are in sensitive periods. In order to save labor, some peasants sometimes pour the chemicals that should be divided into three buckets of water into a bucket of water, which could easily lead to excessive pesticide overdose resulting in phytotoxicity.
There are three main ways to avoid phytotoxicity. The first is to select pesticides rationally and try not to use pesticides that are sensitive to crops; the second is to select suitable weather conditions to use pesticides to avoid spraying pesticides under high temperature, drought, high humidity, low temperature, low light, or high light; Dosage and operating procedures are required to be administered. Accurately calculate the dose to be used, dilute step by step, and clean the sprayer as soon as possible after spraying the herbicide.
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