摘要
【目的】明确密度对扶桑绵粉蚧Phenacoccus solenopsis Tinsley种群增长的影响,为大田防治该虫提供理论依据。【方法】本研究在温度(26±1)℃、RH 70%±10%、光周期16L︰8D条件下,对单位面积内(15 cm^(2))不同密度(2、5、10、15和20头)下饲养的扶桑绵粉蚧的生长发育和繁殖进行研究。【结果】不同密度对其发育历期、存活率、寿命、产卵量和种群增长均有影响;饲养密度为5和10头时其发育历期分别为(26.60±0.57)d和(26.67±0.45)d,显著短于其他密度下的发育历期(P<0.05);若虫密度为2头时,单雌平均产卵量最高,为(100.56±1.25)粒,若虫密度5头时,单雌平均产卵量为(61.29±2.64)粒;若虫密度为5头时其存活率为75%,显著高于其他密度(P<0.05);净增殖率(R_(0))以若虫密度为2头时最大,R_(0)为31.425,其次为密度为5头时,R_(0)为22.985,且R_(0)值随若虫密度的增加而下降;种群倍增时间(t)以若虫密度为5头时最小,t为5.635 d,其次是若虫密度为10头时,t为5.682 d,总的趋势为t值随若虫密度的增加呈现出先减小后增加。【结论】综合扶桑绵粉蚧若虫密度与其生长发育与繁殖的相关性结果,表明若虫密度为5头/15 cm^(2)时,最适合其生长发育和繁殖,密度过低或过高均对其种群产生不利的影响。研究结果表明若虫密度是影响扶桑绵粉蚧种群增长的重要因子之一,可作为调查及防治该害虫的重要指标。
[Objectives]To clarify the effect of density on the population growth of Phenacoccus solenopsis to improve control of this pest.[Methods]The development and reproduction of P.solenopsis kept at(26±1)℃,a RH of 70%±10%and a photoperiod of 16L︰8D,was measured at different nymphal densities(2,5,10,15,and 20 per 15 cm^(2)).[Results]The developmental duration was significantly shorter,(26.60±0.57)d and(26.67±0.45)d,respectively,at nymphal densities of 5 or 10 per 15 cm^(2)(P<0.05).Female fecundity was highest[(100.56±1.25)progeny per female]at a nymphal density of 2,followed by a nymphal density of 5[(61.29±2.64)progeny per female].The survival rate at a nymphal density of 5 was 75%,which was significantly higher than the other treatments(P<0.05).The net reproductive rate(R_(0))was highest at a nymphal density of 2(31.425),followed by that at a nymphal density of 5(22.985).R_(0)decreased with increasing nymph density.The population doubling time(t)was shortest at a nymphal density of 5(5.635 d),followed by a nymphal density of 10(105.682 d).The t value was first negatively,then positively,correlated with nymphal density.[Conclusion]Nymphal density affects the population growth of P.solenopsis.A density of 5 nymphs/15 cm^(2)was the most suitable for the growth,development and reproduction of this species;lower or higher densities were less suitable.These findings are useful for further research on control methods for P.solenopsis.
作者
罗正玉
高莉萍
杜嘉宜
雷小涛
王香萍
张金平
LUO Zheng-Yu;GAO Li-Ping;DU Jia-Yi;LEI Xiao-Tao;WANG Xiang-Ping;ZHANG Jin-Ping(Hubei Engineering Technology Center for Forewarning and Management of Agricultural and Forestry Pests,Institute of Entomology,College of Agriculture,Yangtze University,Jingzhou 434025,China;MARA-CABI Joint Laboratory for Bio-safety,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China)
出处
《应用昆虫学报》
CAS
CSCD
北大核心
2023年第5期1467-1475,共9页
Chinese Journal of Applied Entomology
基金
长江大学优秀青年教师基金资助项目(201305)
湿地生态与农业利用教育部工程中心开放基金项目(201403)
关键词
扶桑绵粉蚧
适应性
密度
存活率
产卵量
寿命
种群生命表
Phenacoccus solenopsis
fitness
density
survival rate
fecundity
longevity
population life table
作者简介
第一作者:罗正玉,E-mail:luozhenggyu@163.com;共同通讯作者:王香萍,E-mail:wang.xiang.ping@126.com;共同通讯作者:张金平,E-mail:j.zhang@cabi.org
