Life Table of Natural Population of Gastrolina depressa

• 作者: Liu Tongtong
• 来源期刊: Plant Diseases and Pests(植物病虫害研究:英文版)
• 学科: 社会科学
• 关键词: Gastrolina depressa Life table of natural population
• 年，卷（期）: 2020,（3）
• 页码范围: 6-7
• 页数: 2页
• 分类号: C92

摘要

[Objective]The paper was to understand the population development regularity of Gastrolina depressa in natural environment in Guizhou Province.[Method]The population dynamics of G.depressa was studied by establishing life table of natural population of G.depressa via field observation and calculating dynamic trend index of population.[Result]The mortality rates in egg stage,pupal stage and adult stage accounted for 26.42%,10.96%and 8.22%of the total mortality rate,respectively.The mortality rate in larval stage was the highest,accounting for 54.40%of the total mortality rate,higher than the total mortality rate in the other three stages.The population dynamic trend index I=9.25,I>1 indicated that the population showed an upward trend.[Conclusion]Under the natural conditions,the population of G.depressa shows upward trend,and human intervention is needed to control the population.The larval stage is the weak stage of the insect,which is the best time to control the insect.