Seasonal Change in Rice water Weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera : Curculionidae), in Rice Field

중부지방에 있어서 벼물바구미의 년중 발생 경과

  • Published : 1990.09.01

Abstract

Seasonal occurrence in each stages of rice water weevil, Lissorhoptrus oryzophilus Kuschel, was studied in paddy field transplanted on May 25, Siehung, 1989. The peak of overwintered adults was late May an that of newly emerged adults was early August. Oviposition occurred in late May and late June and its peak was observed on early June. Larvae were observed from early June to early August and pupation occurred from early July to late August. The first adults of newly emerged rice water weevil was observed on early July and its emergence peak was early August.