Larvae of the firefly Pyrocoelia pectoralis (Coleoptera: Lampyridae) as possible biological agents to control the land snail Bradybaena ravida
Larvae of the firefly Pyrocoelia pectoralis (Coleoptera: Lampyridae) as possible biological agents to control the land snail Bradybaena ravida
复制标题
萤火虫 Pyrocoelia pectoralis（鞘翅目：萤科）的幼虫可能作为控制陆地蜗牛 Bradybaena ravida 的生物制剂
DOI：
10.1016/j.biocontrol.2013.02.005
复制
发表时间：
2013-05-01
影响因子：
4.2
通讯作者：
Meyer-Rochow, V. Benno
中科院分区：
文献类型：
--
作者：
Fu, Xinhua;Meyer-Rochow, V. Benno
通过对胸果潜蝇的饲养试验，证明该种在实验室和野外条件下均能繁殖成功，幼虫有越冬和非越冬两种类型。比较表明，两种幼虫的分化发生在第三龄幼虫之后。在田间，非越冬幼虫在9月份化蛹，10月份羽化，产生第二个一年生世代，而越冬幼虫从3龄开始生长缓慢，然后越冬，最终达到比非越冬幼虫更大的尺寸，并在9月份化蛹。成虫在10月份出现。在温度为15℃、20℃、25℃、30℃和35℃的光周期下，观察了幼虫在15℃、20℃、25℃、30℃和35℃下的发育。在15℃时，4龄幼虫全部死亡，但在20℃~30℃之间，幼虫的发育阶段逐渐变短，而在35℃时，4龄幼虫又开始延长。摄食能力随温度升高而增加，在35℃时随温度升高而下降。在L：D=16：8、12：12和8：16的25℃光照条件下，L：D=16：8时幼虫取食期最短，L：D=8：16时幼虫取食期最长，取食量与暗期长短呈正相关。光照时间较长的幼虫化蛹时间明显早于光照时间较短的幼虫。越冬幼虫的数量与不同的温度和光照周期没有显著差异。(C)2013 Elsevier Inc.保留所有权利。
Rearing experiments with the firefly Pyrocoelia pectoralis demonstrated that the species can be successfully bred under laboratory and field conditions and that there are two types of larva: overwintering and non-overwintering. Comparisons showed that the differentiation between the two larval types occurred after the third larval stage. In the field, non-overwintering larvae pupate in September, emerge in October and produce a second annual generation, while overwintering larvae begin to grow more slowly from the 3rd instar onward, then overwinter to ultimately reach a larger size than the non-overwintering larvae and to pupate in September. Adults emerge in October. Larval development at 15, 20, 25, 30 and 35 degrees C was investigated under a photoperiod of L:D = 12:12. At 15 degrees C all larvae died as 4th instars, but from 20 degrees C to 30 degrees C larval phases became increasingly shorter, while at 35 degrees C they lengthened again. Larval feeding capacity increased with higher temperature up to 30 degrees C, but decreased at 35 degrees C. Under three photoperiods, i.e., L:D = 16:8, 12:12 and 8:16 at 25 degrees C, the larval period was shortest under L:D of 16:8 and longest under L:D = 8:16. Feeding capacity of the larvae exhibited a positive correlation with the duration of the dark period. Larvae under longer periods of illumination pupated considerably earlier than those kept one under shorter periods of light exposure. No significant differences in the numbers of overwintering larvae were found in connection with different temperatures and photoperiods. (C) 2013 Elsevier Inc. All rights reserved.