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生命表作为昆虫种群数量动态的研究,近年来已成为一种有效的手段。近年来由于水稻改制和品种等关系,三化螟Tryporyza incertulas(Walker)危害日益严重,有必要深入地掌握其种群数量动态,分析其主导因素,以便准确地进行数量预测,并提出合理可行的防治策略。为此,作者(黄)于1965、1966两年在广东湛江地区遂溪城月观察了三化螟的种群数量变动,共得生命表9个;1979年又在广东四会县大旺华侨农场观察了一年,又得生命表2个,现作如下初步报道。 一、第一代生命表的初步分析 1965、1966两年所得第一代生命表见表1。
As a dynamic study of the insect population, the life table has become an effective measure in recent years. In recent years, because of the relationship between rice modification and breed, the damage of Tryporyza incertulas (Walker) is becoming more and more serious. It is necessary to grasp its population dynamics and analyze its dominant factors in order to predict the quantity accurately and to propose a reasonable and feasible control Strategy. To this end, the author (Huang) in 19651966 two years in Zhanjiang City, Guangdong Suixi month observation of the population changes of the three borer, a total of 9 life tables were obtained; in 1979 in Guangdong Sihui County large Mong overseas farms Observed for a year, but also life table 2, is now as follows preliminary report. First, a preliminary analysis of the first generation of life table The first generation of life tables obtained in 19651966 in two years is shown in Table 1.