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自从发现棉蚜、红蜘蛛、棉铃虫和黄条跳甲等害虫有抗药性以来,农药混用在生产上更为重要。毛主席教导我们:“我们不但要提出任务,而且要解决完成任务的方法问题。”要搞好农药混用,必须从生产出发,先行试验,根据试验的要求和条件,进行设计。如果设计不当,则试验结果难以分析,或导致错误的结论。运用正确的设计进行试验,可减少试验误差,通过试验结果的观察和简单计算,获得较正确的分析结果。如果要估计试验误差或作进一步的分析,应当运用统计方法。现将我们在1962—1972年曾采用的几种设计方法,介绍如下,供参考。
Since the discovery of cotton aphids, red spider, cotton bollworm and yellow strip beetles and other pests have resistance, pesticide mix in the production is even more important. Chairman Mao taught us: “We must not only put forward the task, but also to solve the problem of completing the task.” To improve the mix of pesticides, we must proceed from the production, the first test, according to the test requirements and conditions for design. If not properly designed, the test results are difficult to analyze or lead to erroneous conclusions. Using the correct design of the test can reduce the test error, through the observation of the test results and simple calculations, to obtain more accurate analysis results. If you want to estimate the experimental error or for further analysis, you should use statistical methods. Now we have adopted in 1962-1972 several design methods, introduced below, for reference.