合理施用化学农药,对确保农作物免受害虫所造成的损失有巨大的作用。但如盲目依靠大量化学农药治虫,会产生一系列不良后果,如环境污染,杀死天敌,破坏生态平衡,增加生产成本,降低棉农经济收益等等。本文就都昌县棉区化学农药用量的调查谈搞好棉虫综合防治的重要意义。(一)笔者一九八○年元月下旬在棉区曾就1979年棉区的农药用量与农药费用同1968年我县高产大队——虬门大队的用药量和药费作过一些调查和比较,(见表一) The rational application of chemical pesticides has a huge effect on ensuring that crops can be protected from pests. However, blindly relying on a large number of chemical pesticides will produce a series of adverse consequences, such as environmental pollution, killing natural enemies, damaging the ecological balance, increasing production costs and reducing farmers’ economic returns. In this paper, Duchang cotton area chemical pesticide survey to talk about the importance of comprehensive prevention and control of cotton insects. (I) I made some investigations on the dosage of pesticides and pesticides in the cotton area in 1979 in the cotton area in late January 1980, together with the dosage and drug charges of the high-yielding brigade-gate gate in our county in 1968 and Compare (see Table 1)