绿缘扁角叶甲生活史、交配及繁殖的观察
Observations on the life history, mating and fecundity of Platycorynus parryi Baly
何海敏** 肖 亮 傅 淑 薛芳森***
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DOI：10.7679/j.issn.2095-1353.2015.020
作者单位：江西农业大学昆虫研究所，南昌 330045
中文关键词： 绿缘扁角叶甲，生活史，交配，繁殖
英文关键词： Platycorynus parryi, life history, mating, reproduction
中文摘要：【目的】 探明绿缘扁角叶甲Platycorynus parryi Baly年生活史、交配及繁殖情况。【方法】 越冬代成虫在室内自然条件下连续繁殖，及在不同温度下，详细观察记录了成虫的交配、繁殖力和寿命。【结果】 绿缘扁角叶甲是络石Trachelospermum jasminoides的重要害虫，以老熟幼虫在3~5 cm深的土层中越冬，在江西南昌一年发生1代。越冬幼虫于次年4月中旬开始陆续化蛹，4月下旬成虫开始羽化。自然条件下各虫态发育历期：卵期（11.81±0.17）d，幼虫期300~330 d，蛹期（13.62±0.13）d，成虫寿命（47.99±0.65） d。成虫羽化3~4 d后开始交配，日平均交配（3.55±0.11）次，交配持续时间最短5 min，最长可达140 min，平均交配持续时间（28.11±0.89）min，日龄大的成虫交配持续时间显著短于日龄小的成虫；相邻两次交配之间的间隔时间最短3 min，最长426 min，平均交配间隔时间（74.75±3.19 ）min，日龄大的成虫交配间隔时间显著短于日龄小的成虫。交配后2~3 d开始产卵，平均每雌产卵量为169粒。在22、25和28℃条件下，温度对雌虫寿命具有显著影响，随着温度升高，雌虫寿命显著缩短，而雄虫寿命和每雌产卵量却差异不显著。【结论】 绿缘扁角叶甲在江西南昌一年发生1代，以老熟幼虫在土中越冬，成虫可进行多次交配，成虫日龄对其交配行为有显著影响，温度对该虫的繁殖力无显著影响。
英文摘要：
[Objectives] To explore the life history, mating behavior and reproduction of Platycorynus parryi Baly. [Methods] Adults from the overwintering generation were allowed to reproduce under natural conditions and their mating behaviors, fecundity and longevity was observed under different temperatures. [Results] Platycorynus parryi is a serious pest of Star jasmine (Trachelospermum jasminoides) in China. It has one generation a year and overwinters as larvae at a depth of 3-5 cmin soil in Nanchang, Jiangxi Province. The overwintering larvae pupate in mid-April. Adults appear in late April. Under natural conditions, the egg stage was (11.81±0.17) days, the larval stage 300-330 days and the pupal stage (13.62±0.13) days. Adult longevity was (47.99±0.65) days. Adult mated 3-4 days after emergence and mated on average (3.55±0.11) times per day. Mating duration ranged from 5 to 140 min with a mean of (28.11±0.89) min. The mating duration for older adults was significantly shorter than for young adults. The interval between two consecutive mating bouts ranged from 3 to 426 min with a mean of (74.75±3.19)min. The duration of the between-mating interval for older adults was significantly shorter than for young adults. Adults laid eggs 2-3days after mating; mean egg-production per female was 169. Temperature had significant effects on the longevity of females which declined with increasing temperature. However, temperature had no significant effects on the longevity of males or on egg-production. [Conclusion] P. parryi has one generation a year and overwinters as larvae in soil in Nanchang, Jiangxi Province. Adults can mate multiple times and adult age has significant effects on mating behaviors. Temperature has no significant effects on fecundity.