武汉地区春甘蓝小菜蛾发生动态与气象因子关系研究

Study on the Relationship between Occurrence Dynamics of Diamondback Moth and Meteorological Factors inWuhan

采用性诱法及田间调查法对2018年、2021年武汉地区春甘蓝上的小菜蛾幼虫和成虫开展动态监测并分析了其发生动态与气象因子的关系。结果表明:武汉地区小菜蛾的发生与气温显著相关(P值),降雨在一定程度上对小菜蛾的发生发展有抑制作用。根据同时期逐日的气象数据,探讨了武汉地区小菜蛾越冬及成虫高峰日前期的气象条件。小菜蛾在武汉越冬虫源存活率高,适温少雨日照多有利于小菜蛾成虫暴发。本研究为利用当地的气象资料推测小菜蛾的发生动态,确定防治期,科学有效地指导防治提供理论依据。

The dynamic monitoring of plutella xylostella larvae and adults on spring cabbage in Wuhan in 2018 and 2021 was carried out by means of sexual induction and field investigation.The results showed that the occurrence of plutella xylostella in Wuhan was significantly related to the temperature,and the rainfall had an inhibitory effect on the occurrence and development of plutella xylostella to a certain extent.Based on the daily meteorological data of the same period,the meteorological conditions of diamond‐back moth overwintering and the prepeak period of adults in Wuhan were discussed.The survival rate of plutella xylostella overwintering in Wuhan is high,and the suitable temperature,less rain and more sunshine are conducive to the outbreak of plutella xylostella adults.This study provides a theoretical basis for using the local meteorological data to speculate the occurrence dynamics of diamondback moth,determine the control period,and guide the control scientifically and effectively.