Impact of sublethal Paraquat on the survival and the parasitic behavior of Diaeretiella rapae M'Intosh
- 作者：XU RCHEN YBLIU SQZHANG WD
- 会议时间：2009-11-01
- 关键词：Sublethal ; paraquat ; toxicity ; parasitic behavior ; functional response
- 作者单位：XU R(Provincial Key Laboratory for Rural Energy Engineering, Yunnan Normal University, Kunming, P. R. China;College of Life Science, Yunnan University,Kunming, Yunnan, P. R. China)CHEN YB,LIU SQ(Provincial Key Laboratory for Rural Energy Engineering, Yunnan Normal University, Kunming, P. R. China)ZHANG WD(Provincial Key Laboratory for Rural Energy Engineering, Yunnan Normal University, Kunmi)
- 母体文献：第十三届世界湖泊大会论文集
- 会议名称：第十三届世界湖泊大会
- 会议地点：武汉
- 主办单位：中国环境科学学会
- 语种：chi
摘要
To enrich pesticide risks assessment methods,and show the need to consider herbicide attributes as an essential component of natural enemy protection in biological control practices,the impact of sublethal doses of paraquat on survival,emergence,longevity and parasitic behavior of the Diaeretiella rapae M'Intosh ( Hymenoptera:Braconidae) was studied.Research results showed that the field dose of paraquat caused 100% mortality to D.rapae.The emergence percentage of D.rapae decreased from the control group's 80.5% to 71.5% even treated with the lowest concentration of paraquat,as well as the longevity of new emergent adults decreased significantly.The oviposition capability of D.rapae decreased significantly along with the inhatbiting time in searching area shortened and ovipositor thrusting frequency declined.Research results also showed that paraquat couldn't change the type of functional response,but the parameters of functional response were significantly changed,handling time (Th) was prolonged and the attack rate (a') declined.