蚕业科学
蠶業科學
잠업과학
ACTA SERICOLOGICA SINICA
2009年
4期
865-868
,共4页
杀虫剂%螨危%朱砂叶螨%种群参数%亚致死剂量
殺蟲劑%螨危%硃砂葉螨%種群參數%亞緻死劑量
살충제%만위%주사협만%충군삼수%아치사제량
Pesticide%Spirodiclofen%Tetranychus cinnabarinus Boisduval%Population parameter%Sublethal dose
朱砂叶螨是桑树的主要害虫之一.从避免过度使用农药造成环境污染和控制害螨的抗性发展的角度,研究了杀虫剂螨危的亚致死剂量对朱砂叶螨敏感种群生存与繁殖能力的影响.分别用质量浓度为1.25、2.5、5、10、40 mg/L的螨危药液处理雌成螨,48 h后的存活率分别为96%、83%、81%、75%、48%;药液对雌成螨和卵的致死中浓度(LC_(50))分别是35.005 mg/L和0.690 mg/L,卵的敏感性明显高于雌成螨.与对照组相比,随螨危药液处理浓度增高,雌成螨的7 d总产卵量和孵化率呈下降趋势;用10、5、2.5、1.25 mg/L药液处理后朱砂叶螨种群的瞬时增长率(r_i)分别是-0.083、0.142、0.214、0.298,而对照组为0.544,有效中浓度(EC_(50))值为1.627 mg/L.研究结果表明,用低于推荐使用浓度(40 mg/L)的螨危药液就能有效控制朱砂叶螨种群的增长.
硃砂葉螨是桑樹的主要害蟲之一.從避免過度使用農藥造成環境汙染和控製害螨的抗性髮展的角度,研究瞭殺蟲劑螨危的亞緻死劑量對硃砂葉螨敏感種群生存與繁殖能力的影響.分彆用質量濃度為1.25、2.5、5、10、40 mg/L的螨危藥液處理雌成螨,48 h後的存活率分彆為96%、83%、81%、75%、48%;藥液對雌成螨和卵的緻死中濃度(LC_(50))分彆是35.005 mg/L和0.690 mg/L,卵的敏感性明顯高于雌成螨.與對照組相比,隨螨危藥液處理濃度增高,雌成螨的7 d總產卵量和孵化率呈下降趨勢;用10、5、2.5、1.25 mg/L藥液處理後硃砂葉螨種群的瞬時增長率(r_i)分彆是-0.083、0.142、0.214、0.298,而對照組為0.544,有效中濃度(EC_(50))值為1.627 mg/L.研究結果錶明,用低于推薦使用濃度(40 mg/L)的螨危藥液就能有效控製硃砂葉螨種群的增長.
주사협만시상수적주요해충지일.종피면과도사용농약조성배경오염화공제해만적항성발전적각도,연구료살충제만위적아치사제량대주사협만민감충군생존여번식능력적영향.분별용질량농도위1.25、2.5、5、10、40 mg/L적만위약액처리자성만,48 h후적존활솔분별위96%、83%、81%、75%、48%;약액대자성만화란적치사중농도(LC_(50))분별시35.005 mg/L화0.690 mg/L,란적민감성명현고우자성만.여대조조상비,수만위약액처리농도증고,자성만적7 d총산란량화부화솔정하강추세;용10、5、2.5、1.25 mg/L약액처리후주사협만충군적순시증장솔(r_i)분별시-0.083、0.142、0.214、0.298,이대조조위0.544,유효중농도(EC_(50))치위1.627 mg/L.연구결과표명,용저우추천사용농도(40 mg/L)적만위약액취능유효공제주사협만충군적증장.
Tetranychus cinnabarinus Boisduval is one of the major mulberry pests. In order to avoid excess usage of pesticides which could cause environmental pollution and resistance of the pests,we investigated the effects of sublethal dose of spirodiclofen on survival and reproduction of the susceptible T.cinnabarinus Boisduval population. 48 h after the treatment with 1.25, 2.5, 5, 10, and 40 mg/L spirodiclofen solutions,survival rate of the treated adult females was 96%, 83%, 81%, 75% and 48%, respectively. The median lethal concentration (LC_(50)) of adult females and eggs was 35.005 and 0.690 mg/L respectively. The susceptibility of eggs was significantly higher than that of adult females. Compared to the controls, 7-day total fecundity of the females and hatching rate of the eggs decreased as concentration of spirodiclofen increased. After being treated with 10, 5, 2.5 and 1.25 mg/L spirodiclofen solutions,the instantaneous rate of increase (r_i) was -0.083, 0.142, 0.214 and 0.298 respectively,while that of the control was 0.544. The median effective concentration (EC_(50)) was 1.627 mg/L. The results indicated that using spirodiclofen at concentrations lower than the recommended one (40 mg/L) could already control the increase of T.cinnabarinus Boisduval population effectively.
