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一、前 言 高粱蚜虫Aphis sacchari Zehatner是哲盟地区高粱作物重要害虫。间歇式重发生是它的特点。研究高粱蚜虫重发生的条件,明确在哲盟气候条件下发生发展规律,对提高测报准确率,正确指导防治是十分必要的。 据报道,国内对高粱蚜虫重发生气候条件的研究,多偏重于田间发生期(6—7月),尚未见有论及田间发生期以前(我们称之为蚜源时期)气候对蚜量的影响。因而对下述事实:7月气温较高,雨量较小,发生很轻(钱家店,1973年等);7月气温较低,雨量较大,发生较重(钱家店,1975年等),无从解释。从此问题出发,根据本所资料作了进一步研究,总结如下:
I. Introduction The sorghum aphid Aphis sacchari Zehatner is an important pest of the sorghum crop in the Zhe-GM region. Intermittent re-occurrence is its characteristic. Studying the condition of heavy aphid infestation in sorghum and making it clear that the law of development happened in the climate of Zheche League would be very necessary to improve the accuracy of measuring and reporting and correct prevention and control. It is reported that the research on the climatic condition of heavy aphid in China is mostly focused on the field occurrence period (June-July), and the amount of aphids on aphids before the field occurrence (we call it aphid-source period) has not been seen yet influences. Therefore, the following facts: July high temperature, rainfall is small, very mild (Qian shop, 1973, etc.); July low temperature, rainfall, heavier (Qian shop, etc. in 1975 ), Can not explain. Starting from this issue, according to the data made further study, summarized as follows: