摘要
采用饲料混毒法系统测定了吡丙醚和烯虫酯两种昆虫生长调节剂 (IGRs)对重要的储藏物害虫嗜卷书虱 L iposcelis bostrychophila Badonnel若虫和成虫的致死作用 ,对若虫发育情况、成虫繁殖力和卵孵化率的影响。结果表明 ,以吡丙醚和烯虫酯 10 mg/ kg的混毒饲料饲喂嗜卷书虱 2龄幼虫 4 9d后 ,若虫的死亡率分别为80 .0 0 %和 31.11% ;取食 2 0、10和 5 mg/ kg吡丙醚的若虫最长存活天数分别为 71.0、98.2和 116 .4 d,而对照仅 11.3d即全部羽化为成虫 ;取食 2 0 mg/ kg以下烯虫酯混毒饲料的若虫一部分仍可羽化成成虫 ,而且成虫仍可繁殖后代 ;取食吡丙醚混毒饲料的若虫 ,6 0 d后存活下来的若虫大多以超龄若虫的形式存在 ,而取食烯虫酯的若虫则很少出现超龄若虫。成虫取食烯虫酯 (2 0 0 mg/ kg)和吡丙醚 (40 mg/ kg)混毒饲料后 7d,死亡率分别为 2 6 .6 7%和 2 3.33% ,成虫产卵量分别是对照的 39.77%和 2 6 .13% ,产卵后 15 d,卵的孵化率分别是6 5 .71%和 8.6 9% ,而对照仅为 93.18%。该项研究表明 ,采用 4 0 mg/ kg吡丙醚和 2 0 0 mg/ kg的烯虫酯对嗜卷书虱虫口数量有明显的控制作用。
The lethal and growth inhibiting effects of two insect growth regulators (IGRs), (methoprene) and pyriproxyfen, on Liposcelis bostrychophila Badonnel were investigated (systematically) by feeding artificial diet containing the active ingredient. The results indicated that the two (IGRs) had obvious lethal action on the nymphs; and the mortalities of nymphs fed with (10 mg) (a.i.)/kg diet of methoprene and pyriproxyfen for 49 d were 80.00% and 31.11%, (respectively.) The (maximum) nymph duration fed with 20,10,5 mg/kg pyriproxyfen were 71.0,(98.2) and 116.4 d, (respectively,) whereas that of the control was 11.3 d. Some nymphs fed on methoprene (10 mg/kg) could still develop into adults which were able to reproduce offspring. While most of the nymphs fed with pyriproxyfen at a dosage of 5 mg/kg died after 60 d, and the survivors remained in (super-)nymphal stage. Reproduction experiment indicated that the fecundity of adults fed with (methoprene) (200 mg/kg) and pyriproxyfen (40 mg/kg) were 39.74% and (26.11%) correspondingly, as that of the control in the first week. After 15～16 d, the hatching rates of eggs were 65.71% and (8.69%,) whereas that of the control group was 93.18%. The (results) suggested that pyriproxyfen at 40 mg/kg or methoprene at 200 mg/kg could effectively (reduce) the amount of the population of L. bostrychophila.
出处
《农药学学报》
CAS
CSCD
2003年第4期15-22,共8页
Chinese Journal of Pesticide Science
基金
国家自然科学基金项目 (3 980 0 0 1 7)
霍英东教育基金 (71 0 2 2 ).~~
关键词
嗜卷书虱
昆虫生长调节剂
吡丙醚
烯虫酯
Liposcelis bostrychophila Badonnel
insect growth regulators(IGRs)
methoprene
pyriproxyfen
