茶叶科学2025，Vol.45Issue(1)：79-86,8.
温度对灰茶尺蠖幼虫龄期数量的影响
Determination of the Larval Instar Numbers of the Ectropis grisescens at Different Temperatures
摘要
Abstract
Ectropis grisescens is one of the most harmful pests in tea plantations,characterized by its frequent annual occurrences and considerable damage.The understanding of the larval instar number remains still elusive.To clarify the relationship between the larval instars of Ectropis grisescens and temperature,the differences in larval instar and the fertility indexes including developmental duration,pupal weight and sex ratio of different larval instar populations were measured at five different temperatures(21,23,25,27,29℃)in the climate incubators.The results show that the E.grisescens were 4(molting 3 times,referred to as the 4th instar)or 5(molting 4 times,referred to as the 5th instar)larval instars at each temperature from 21℃to 29℃.At 21℃and 23℃,there was no significant differences between the proportion of 5th instar and 4th instar.When the temperature exceeded 25℃,the proportion of 5th instar was significantly higher than that of 4th instar,reaching 67.4%-78.6%.Temperature had a significant effect on the developmental duration,pupal weight of the 5th and 4th instars,but had no significant effect on the sex ratio of male and female.At the same temperature,the larval period of the 5th instar was longer than the 4th instar,the pupal weight increased,and the sex ratio increased significantly.This study indicates that the larval instars of E.grisescens were 4 or 5,and the proportion of 5th instar larvae increased with the increase of temperature.This may be a survival strategy of E.grisescens to deal with adverse environment.关键词
灰茶尺蠖/龄数/温度/历期/蛹重/性比Key words
Ectropis grisescens/instar number/temperature/developmental duration/pupal weight/sex ratio分类
农业科学引用本文复制引用
唐美君,李红,张欣欣,姜洪新,王志博,郭华伟,肖强..温度对灰茶尺蠖幼虫龄期数量的影响[J].茶叶科学,2025,45(1):79-86,8.基金项目
中央级公益性科研院所基本科研业务费专项(1610212022007)、国家重点研发计划(2020YFD1000701) （1610212022007）
