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南阳地处江淮流域,是一代粘虫(My-thimna separata Walker)常发区。主要为害小麦,常年2月下旬至4月中旬华南越冬代成虫迁入该区,经繁殖为害后,其种群数量以数倍甚至数十倍地增加,并于5月底和6月上旬羽化外迁。为了解一代粘虫自然种群消长情况及影响其消长的主要原因,为粘虫的异地测报和当地的综合防治提供科学依据,作者自1980—1983年对制作麦田粘虫自然种群生命表进行了初步探讨,虽只能代表南阳地区这4年的情况,但作为一个方法,对读者或有参考价值,现将结果整理如下。
Located in the Yangtze-Huaihe River basin, Nanyang is a common area of My-thimna separata Walker. The main damage to wheat, perennial February to mid-April overwintering adult migrate into the South China, after breeding damage, the population to several times or even dozens of times to increase, and in late May and early June eclosion relocation . In order to understand the growth and development of the natural population of Mythimna separata and the main reason for its influence on the growth and decline of Mythimna separata, to provide a scientific basis for remote measurement of Mythimna separata and local comprehensive prevention and control, Discussion, although only on behalf of Nanyang this four-year situation, but as a method for readers or have reference value, now the results are as follows.