生物安全学报2016，Vol.25Issue(3)：189-193,5.DOI:10.3969/j.issn.2095-1787.2016.03.006
云南稻区稻水象甲Lissorhoptrus oryzophilus Kuschel种群发生特征
Population characteristics of the rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera, Curculionidae) in Yunnan Province, China
摘要
Abstract
Background] The rice water weevil, Lissorhoptrus oryzophilus Kuschel, was first detected in Songming County of Yunnan Province in June 2007. In order to control its damaged, we characterised its occurrence, number of generations per year, population fluctuation of adults and larvae, and overwintering characteristics. [Method] We conducted regular field surveys in 2008-2010 in Bridge village, Songming County, Kunming City, Yunnan Province, China. [Result] When temperatures reached an average of 16 ℃ in early April ( temperature range 9.0~24.1℃) , the overwintering adults became active and migrated into rice paddies, set-tling and feeding on weeds and rice seedlings. In mid-May, the adults moved to rice fields and started egg laying on rice plants, and the larvae fed on new rice roots after the eggs hatched. At the tillering phase in mid-June, the larval population reached its peak, with 3.17~11.33 larvae per cluster. At rice booting stage in mid-to late July, cocoon density in the soil peaked, reaching 5.90~9.00 cocoons per cluster. At rice flowering and tesseling stage in late July to the middle of August, adults reached their peak density, after which the newly emerged adults gradually migrated to rice fields near sunny slopes and ridges to bury themselves to a maximum of 3 cm into the soil where they remained inactive during winter, we found a maximum of 98.33~266.00 overwintering adults per square meter.[Conclusion and significance] The rice water weevil produced 1~1.5 generations in Songming, closely synchronised with the growth stages of rice. The overwintering adults start to damage seedlings in the early April. July is the critical period for damage prevention and treatment against adults in Yunnan Province.关键词
稻水象甲/种群动态/越冬/云南省Key words
Lissorhoptrus oryzophilus/population dynamics/overwintering/Yunnan Province引用本文复制引用
尹艳琼,李向永,赵雪晴,刘萍,谌爱东..云南稻区稻水象甲Lissorhoptrus oryzophilus Kuschel种群发生特征[J].生物安全学报,2016,25(3):189-193,5.基金项目
科技部国际合作项目(2011DFB30040)；云南省科技计划项目(2014IA009)；云南省现代农业水稻产业技术体系 （2011DFB30040）
