Abstract

The fall armyworm (FAW), Spodoptera frugiperda is a ruinous insect pest, native to tropical and subtropical regions of western hemisphere. It has recently invaded Indian subcontinent during 2018, causing severe damage to crops of several genera of many plant families. The incidence of FAW infestation ranged from 12% to 74%, indicating its establishment in central India where it poses an immediate and significant economic threat to crop production. Phylogenetic analysis revealed that Jhansi, Uttar Pradesh isolate is closely related to the isolates of southern states of India. Studies on biology of FAW indicated no variation in biological parameters, when reared on fodder maize and fodder sorghum, however recorded longer larval and pupal duration (16.07 and 10.00 days) when reared on artificial diet. The adults laid more number of eggs under crop mosaic condition with varied phenological crop growth stages and the fodder maize (782.33 eggs) was most preferred for oviposition. A total of five parasitoids were recovered from the field collected larvae and also predation by generalist predator, Eocanthecona furcellata (Wolff) was recorded during the study period.

摘要

秋粘虫 (FAW)、草地贪夜蛾 (Spodoptera frugiperda)是一种毁灭性害虫，原产于西半球热带和亚热带地区。它最近于 2018 年入侵印度次大陆，对许多植物科的几个属的作物造成严重损害。秋粘虫感染的发生率从 12% 到 74% 不等，表明它在印度中部扎根，对农作物生产构成了直接而重大的经济威胁。系统发育分析表明，北方邦占西分离株与印度南部各州的分离株密切相关。对秋粘虫生物学的研究表明，当用饲料玉米和饲料高粱饲养时，其生物学参数没有变化，但当用人工饲料饲养时，幼虫和蛹的持续时间更长（16.07 和 10.00 天）。在不同物候作物生长阶段的作物花叶条件下，成虫产卵量较多，其中饲用玉米（782.33卵）最优先产卵。从田间收集的幼虫中回收了总共 5 只寄生蜂，也被多面性捕食者捕食，在研究期间记录了Eocantheconafurcellata (Wolff)。