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尽管目前有许多研究致力于发展新的植保技术来防治病虫草害,但是化学农药还是最有力的防治手段。化学农药的防治效果很高,但是目前使用效率却很低,有时只有一小部分农药真正到达靶标发挥生物防治效果,大量的农药流失到地面或者飘失到空气中,不但浪费农药,增加成本,而且对人身和环境造成伤害和污染。
Although there are many studies devoted to the development of new plant protection technologies to prevent pests and diseases, chemical pesticides are still the most powerful prevention and treatment measures. Chemical pesticides have very high prevention and control effects, but the current use efficiency is very low. Sometimes only a small part of pesticides actually reach the targets to exert biological control effects. Large amounts of pesticides are lost to the ground or drifted into the air, which is not only a waste of pesticides and an increase of costs. It also harms and pollutes people and the environment.