摘要
为明确菱斑食植瓢虫幼虫龄期的划分及其生物学和生态学特征等,为科学防治菱斑食植瓢虫提供理论依据,通过室内对菱斑食植瓢虫各龄期幼虫的头壳宽和体长进行测量,同时对试验种群采用年龄-龄期两性生命表法分析菱斑食植瓢虫种群的生活史、存活率、繁殖力等参数。结果显示,菱斑食植瓢虫幼虫头壳宽和体长均可作为菱斑食植瓢虫幼虫分龄的形态指标。菱斑食植瓢虫幼虫期发育历期以4龄期最长,为11.02 d;雌成虫期大于雄成虫期,雌成虫的平均单雌产卵量为248.89粒。菱斑食植瓢虫成虫前各虫态的存活率均较高,卵发育至110 d种群死亡率大幅提高;种群内禀增长率r为0.067,周限增长率λ为1.069,净增殖率R_(0)为133.471,平均世代周期T为73.517 d。综上,信阳地区菱斑食植瓢虫幼虫体长和头壳宽可用于分龄期,且幼虫期的存活率较高,世代周期较长,种群可稳定增长,可为害虫适时防治提供科学指导。
In order to clarify the division of larval instars of Epilachna insignis,and its biological and ecological characteristics,and to provide theoretical basis for the scientific control of E.insignis,the head capsule width and body length of the larvae of E.insignis at each instar were measured indoors,and the life history,survival rate,fecundity and other parameters of the experimental population were observed and analyzed by the age-stage,two-sex life table.The results showed that the head capsule width and body length of the larvae of E.insignis could be used as the morphological index for the division of the instar of the larvae of E.insignis.The developmental duration of the larvae of E.insignis was the longest in the fourth instar,which was 11.02 d;the developmental duration of the female adults was longer than that of the male adults,and the average single female egg production was 248.89 eggs.The survival rate of each stage before the adult stage of E.insignis was relatively high,and the rate of the population mortality increased sharply when the eggs develop to 110 days;the intrinsic rate of increase(r)of the experimental population was 0.067,the finite rate of increase(λ)was 1.069.The net reproductive rate(R_(0))was 133.471,and the mean generation time(T)was 73.517 d.The body length and head capsule width of the larvae of E.insignis in the Xinyang area can be used for instar division.Additionally,the larvae have a high survival rate and a long generation cycle,and the population can grow steadily.These findings can provide scientific guidance for the timely control of this pest.
作者
陈俊华
闻鑫茹
侯冰仪
王冉
王喜平
刘红敏
CHEN Junhua;WEN Xinru;HOU Bingyi;WANG Ran;WANG Xiping;LIU Hongmin(Xinyang Agriculture&Forestry University,Xinyang 464000,Henan,China;Henan Crop Green Production Engineering Technology Research Center,Huangchuan 465150,Henan,China)
出处
《中国瓜菜》
北大核心
2025年第8期206-212,共7页
China Cucurbits And Vegetables
基金
河南省重点研发专项(241111311400)
信阳农林学院教改研究项目(2024XJGGJ24)。
关键词
菱斑食植瓢虫
栝楼
幼虫龄期
生命表
Epilachna insignis
Trichosanthes kirilowii
Larval instars
Life table
