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在农药使用过程中,由于施药不当等诸多原因,往往引起作物药害。农药对作物的药害有急性和慢性两种。急性药害在喷药后几小时至数日内表现出来,主要症状表现为:叶片出现斑点、黄化、失绿、枯萎、卷叶、落叶、落花、落果、缩节、簇生等。慢性药害经过较长时间才表现出来,如光合作用减弱、果实形成延迟、矮化畸形、作物生长缓慢等。为避免农作物发生药害。应采取以下防御措施:1.不能使用过期或失效的农药稀释农药用水不能用含杂质的硬水。2.使用浓度适当浓度不
In the process of pesticide use, due to improper spraying and many other reasons, often cause crop injury. Pesticide on the crop phytotoxicity has two kinds of acute and chronic. Acute injury in the spray within a few hours to a few days after the performance of the main symptoms are as follows: leaves appear spots, yellow, green, withered, curly leaves, deciduous, falling flowers, falling fruit, shrinkage, tufted and so on. Chronic injury occurs only after a long time, such as weakened photosynthesis, delayed fruit formation, dwarf deformity and slow crop growth. In order to avoid crop phytotoxicity. The following defensive measures should be taken: 1. Do not use expired or expired pesticides Dilute pesticide water Do not use hard water containing impurities. 2. Use concentration appropriate concentration not