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植物病虫害和杂草的丛生、消长与气候条件有密切关系。采用农药防除病虫及杂草是植物保护的有利武器,是保障农业高产稳产的重要手段。而在选择农药种类、使用方法、避免对作物和人畜的危害和发挥施药后的效果等方面,都必须考虑气候条件的影响。如同一种农药,在某种天气条件下可以提高药效。而在另一条件下,不但药效降低,而且药效期也会缩短。因而,选择适当的气候条件喷施农药在生产实践中是非常重要的。把握适宜的气温:气温的高低直接
Plant pests and weeds clusters, growth and climate conditions are closely related. The use of pesticides to control pests and weeds is a powerful weapon for plant protection and is an important means of ensuring high and stable agriculture. In the choice of pesticide types, methods of use, to avoid harm to crops and human and livestock and exert the effect after spraying, etc., must consider the impact of climatic conditions. Like a pesticide, in some weather conditions can improve efficacy. Under the other conditions, not only will the efficacy be reduced, but also the efficacy period will be shortened. Therefore, the choice of appropriate climatic conditions spraying pesticides in production practice is very important. Grasp the appropriate temperature: the level of temperature directly