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在棉花品种抗蚜研究中,首先遇到的问题是如何准确而迅速地分清田间多品种的蚜害?常用调查方法,统计有蚜株率、百株蚜量和卷叶株率,显然不能适应,因为:①蚜害严重年份,有蚜株很快都达到100％,反映不出品种间的差异;②统计百株蚜量,试验品种多,检查很费时间,当日调查不完,由于蚜虫繁殖快,隔夜检查,误差大,且蚜量多时,群体拥挤,很难数准确;③统计卷叶株率,只能在蚜害发展出现卷叶之后。1975年以来,我们设计和采用了蚜害指数调查法。现将研究结果整理出来,供参考。
In the cotton varieties of aphid research, the first problem encountered is how to quickly and accurately distinguish the field of a variety of pests? Common survey methods, statistical aphid plant rate, aphid volume and leaf roll plant rate, apparently can not adapt , Because: ① aphid serious years, there are aphids quickly reached 100%, reflecting the differences between varieties; ② statistics of aphids amount of more varieties of testing, the inspection is time-consuming, the day the survey was not completed, due to aphids Breeding fast, overnight inspection, the error is large, and the amount of aphids, the crowd crowded, it is difficult to count the number; ③ statistics roll leaf rate, only after the development of leafhoppers occurred in aphids. Since 1975, we have designed and implemented aphid-index surveys. The research results are now sorted out for reference.