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在水稻害虫的综合防治上,如何进一步提高稻田化学防治的效果,减少施药次数,延长残效期,减少环境污染,并有效地保护害虫天敌,这是当前植物保护上必须认真研究的重要课题之一.根据国外近年试验结果表明,稻田深层施药(即水稻根区施药)具有残效期长,不怕下雨,减少喷药次数,并且可以保护害虫天敌的
In the comprehensive prevention and control of rice pests, how to further improve the effect of chemical control in paddy fields, reduce the frequency of pesticide application, extend the residual period, reduce environmental pollution and effectively protect the natural enemies of pests, which is an important issue that must be seriously studied in current plant protection According to the results of experiments in foreign countries in recent years, it shows that deep application of paddy field (ie rice root zone pesticide application) has long residual period, is not afraid of rain, reduces the number of spraying, and can protect pests and natural enemies