粟穗螟滞育的形成和解除与环境条件的关系  

INFLUENCE OF ENVIRONMENTAL CONDITIONS ON THE DIAPAUSE OF FOXTAIL MILLET WEBWORM

作　　者：潘学贤[1] 程开禄[1] 汪远宏[1] 黄富[1] 

机构地区：[1]四川省农科院水稻高梁研究所,泸州646100

出　　处：《昆虫学报》1993年第4期451-458,共8页Acta Entomologica Sinica

摘　　要：粟穗螟Manpava bipunctella Ragonot在川南地区为二化性兼性滞育的昆虫。光周期是诱发滞育的主导因素,在中位温度下,滞育与否主要取决于幼虫发育期间的每日光照时数。在25℃恒温下,临界光周期为14小时38分。幼虫对光照刺激反应的敏感期为低龄期。温度和食料效应只发生在每天14小时以上的长光照下,低温有抵销长光照抑制滞育的作用,高温影响不显著;取食玉米的幼虫滞育率比高粱的高,并随寄主生育阶段的发展而增高。该虫滞育解除必需每天14—15小时的长光照;不利于滞育发育和解除,适宜温度为10—25℃。本文最后讨论了该虫滞育形成和解除的特点对发生规律的作用及在测报上的意义。Foxtail millet webworm (Manpava bipunciella Ragonot) is an insect with facultative dia-pause. It has two generations per year in southern Sichuan. Photoperiod is the main factor in inducing diapause. The percentage of its population entering diapause is decided by photoperiod in early larval stage at medium temperature. The critical phoroperiod is 14 hours and 38 mi-nurcs at 25℃ constant temperature, the first and second larval instars being the sensitive stage. The influence of temperature and food on diapause depends largely on long light period. Low temperatures would inhibit the diapausing effect of long light period. High temperatures, however, had no significant effect. More larvae entered diapause feeding on corn than on sor-ghum. Light period between 14 and 15 hours was the main factor for diapausing larvae to revive. The influence of diapause on the population dynamics of the pest and the significance in pest forecast are discussed.

关 键 词：粟穗暝 滞育 光周期 温度 环境 

分 类 号：S433.4[农业科学—农业昆虫与害虫防治]