绿翅绢野螟实验种群两性生命表的组建与分析

doi:10.19303/j.issn.1008-0384.2019.04.011

摘要/Abstract

摘要： [目的]绿翅绢野螟Diaphania angustalis（Snellen）是糖胶树上的主要害虫之一，以幼虫取食叶片及卷叶危害，严重影响糖胶树的生长发育及观赏与药用价值。为补充其基本生物学信息，提供综合治理绿翅绢野螟的理论依据，开展了绿翅绢野螟各虫态发育历期、繁殖与幼虫取食量等的研究，以期为明确其防治适期提供科学依据。[方法]组建实验种群两性生命表，分析绿翅绢野螟各虫态的发育历期、成虫繁殖力、各龄幼虫取食量和存活率等种群参数。[结果]在温度（28±1）℃、相对湿度（70±5）%及光周期（L：D=12：12）的条件下，绿翅绢野螟种群的平均世代周期为（45.42±0.55）d，内禀增长率为（0.099±0.006）d^-1，周限增长率为（1.104±0.007）d^-1，净增殖率为（92.28±22.50，子代）。雌成虫个体的繁殖力为（369.20±65.44）粒；单头雌成虫最高产卵量达1 267粒。在幼虫期，随着虫龄的增加，发育历期随之增长，取食量随之增加。高龄幼虫的发育历期显著长于低龄幼虫；4~6龄幼虫的取食量显著大于1~3龄幼虫。[结论]综合考虑幼虫各虫龄的发育历期及取食量，认为1~3龄幼虫阶段是其防治的关键时期。

关键词: 绿翅绢野螟, 糖胶树, 两性生命表, 取食量, 生长发育

Abstract: [Objective]Larval development, fecundity and feeding of Diaphania angustalis (Snellen), a major pest that infests blackboard trees by larva feeding on leaves and leaf-rolls causing serious damage on the ornamental and medicinal plants, were studied to determine the effective controlling period.[Method] The development, fecundity, feeding habit and survival rate of D. angustalis larvae were deciphered with the constructed two-sex life table of the pest from an experimental population.[Results] At the temperature of (28±1)℃, relative humidity of (70±5)% and photoperiod of L:D=12:12, the mean generation time of the moth was found to be (45.42±0.55)d; the intrinsic rate of increase,(0.099±0.006)d; the finite rate of increase, (1.104±0.007)d; and, the net reproduction rate,(92.28±22.50) offspring. The fecundity of a female adult was(369.20±65.44)eggs, 1 267 at the highest. The number and reproduction of the population increased with time. At larva stage, the development time and feed consumption increased with age. It took significantly longer for the older larvae than the younger larvae to develop, and a larva consumed significantly more in the 4^th to 6^th than 1^st to 3^rd instar stage.[Conclusion] The most effective period for controlling D. angustalis appeared to fall on the 1^st to 3^rd instar larvae.

Key words: Diaphania angustalis, Alstonia schalaris, two-sex life table, feeding, growth and development

中图分类号:

Q968

林凌鸿, 汪一萍, 李銮, 徐嘉骏, 陈素琴, 朱程, 吴梅香. 绿翅绢野螟实验种群两性生命表的组建与分析[J]. 福建农业学报, 2019, 34(4): 443-450.

LIN Ling-hong, WANG Yi-ping, LI Luan, XU Jia-jun, CHEN Su-qin, ZHU Cheng, WU Mei-xiang. Construction and Analysis of Two-sex Life Table on Experimental Population of Diaphania angustalis[J]. Fujian Journal of Agricultural Sciences, 2019, 34(4): 443-450.

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