室内饲养草地贪夜蛾生物学特性初步研究

为了探索草地贪夜蛾在冀中南的生物学特性,从田间采集草地贪夜蛾卵块,在室内温度24~27℃,相对湿度50%~75%条件下模拟冀中南农田生态环境,对其进行人工饲养。观察记录了草地贪夜蛾从卵到成虫羽化各虫态的形态特征和生活习性的变化以及相应历期,初步明确了在相同生活环境条件下,幼虫生长发育进度不整齐,不同虫龄成活率不同,1龄和2龄时存活率为100%,6龄时存活率为78.33%;且雌蛾发育比雄蛾早1~2 d,草地贪夜蛾在冀中南完成1个世代约需32 d。本研究具有较强的地域性和明确的针对性,为冀中南的草地贪夜蛾监测预警和科学防治提供了理论基础。

Preliminary study on biological characteristics of Spodoptera frugiperda in laboratory

In order to explore the biological characteristics of Spodoptera frugiperda in central and south of Hebei Province, the study collected the Spodoptera frugiperda eggs from the field and simulated the farmland ecological environment in central and south of Hebei Province under the indoor temperature of 24-27 ℃ and relative humidity of 50%-75%, which were raised in captivity. The morphological characteristics and living habits of Spodoptera frugiperda from egg to adult emergence and the corresponding duration were observed and recorded. It was preliminarily confirmed that under the same living environment, the larval growth and development progress were not orderly, and the survival rate was various at different ages, the survival rate at the first and second instars was 100%, the survival rate at sixth instar was 78.33%. The development of female moths was 1-2 days earlier than that of male moths, and it took about 32 days to complete a generation in central and southern Hebei Province. The research had strong regionality and clear pertinence, provided a theoretical basis for the monitoring, early warning and scientific control of the Spodoptera frugiperda in central and southern of Hebei Province.