【摘要】 本文对攀西地区麻疯树(Jatropha curcasL.)人工林中的麻疯树蛀梢斑螟Oncocera faecella Zeller进行了生物学特性观察及其防治药剂筛选的研究。结果表明:该虫在攀西地区1年发生5代,每雌产卵量为(29±17.05)个,卵期(7±1)d,孵化率93.23%;幼虫共4龄,1、2龄取食量小,占整个幼虫生长阶段的10.6%,3、4龄幼虫取食量大,占整个幼虫生长阶段的89.4%;蛹期(13.11±1.05)d,雌雄比为1.04(F)∶1(M),羽化率88.96%。成虫寿命为6～8d。初孵幼虫仅取食叶肉,后缀嫩叶为害梢头,老熟幼虫在叶片上或枯枝落叶中织茧化蛹;以老熟幼虫越冬。对2龄和3龄幼虫进行防治药剂筛选,表明4.5%高效氯氰菊酯1.0×103mg·L-1和0.5×103mg·L-1、30%乙酰甲胺磷乳油0.5×103mg·L-1和0.25×103mg·L-1有很好的防治效果。更多还原

【Abstract】 The biological characteristics of Oncocera faecella Zeller,which has been found to cause disease in Jatropha curcas L. plantations in the Panzhihua and Huili regions,are described,and the effectiveness of potential pesticides to control this pest evaluated. The study population of O. faecella had five generations a year,female fecundity was (29 ± 17. 05),the egg stage was (7 ± 1) d and hatchability was 93. 23% . There were four larval instars. The amount of food consumed by 1st and 2nd instar larvae accounted for 10. 6% of larval growth,much lower than the amount consumed by in 3rd and 4th instar larvae which accounted for 89. 4% . The pupal stage was about 16 d,with a sex ratio of 1. 04 ( F) ∶ 1 ( M) and 88. 96% eclosion. The adult lifespan was generally 6 - 8 d. Newly hatched larvae burrowed into the leaf blade and later feed on young leaves damaging new growth. Fully grown larvae went into the pupal stage within a thin cocoon in either leaf litter or foliage but overwintered as old larvae. Spraying with 1. 0 × 103 mg·L -1 and 0. 5 × 103 mg·L -1 Alphamethrin (4. 5% ) and 0. 5 × 103 mg·L -1 and 0. 25 × 103 mg·L -1. Acephate (30% ) was effective in controlling 2nd and 3rd instar larvae.更多还原