Sublethal effects of a juvenile hormone analog, Pyriproxyfen on demographic parameters of non-target predator, Hippodamia convergens Guerin-Meneville (Coleoptera: Coccinellidae)
文献类型： 外文期刊
作者： Iftikhar, Ayesha 1 ; Hafeez, Faisal 1 ; Hafeez, Muhammad 2 ; Farooq, Muhammad 3 ; Aziz, Muhammad Asif 4 ; Sohaib, M 1 ;
作者机构： 1.Entomol Res Inst, Ayub Agr Res Inst, Faisalabad, Pakistan
2.Zhejiang Acad Agr Sci, State Key Lab Breeding Base Zhejiang Sustainable, Inst Plant Protect & Microbiol, Hangzhou 310021, Peoples R China
3.Queensland Univ Technol, Sch Earth Environm & Biol Sci, Sci & Engn Fac, Brisbane, Qld, Australia
4.Pir Mehr Ali Shah Arid Agr Univ Rawalpindi, Dept Entomol, Rawalpindi, Pakistan
5.Univ Punjab, Inst Agr Sci, Lahore, Pakistan
关键词： Demographic parameters; Hippodamia convergens; Non-target predator; Pyriproxyfen; Sublethal effects
期刊名称：ECOTOXICOLOGY （ 影响因子：2.823； 五年影响因子：2.958 ）
ISSN： 0963-9292
年卷期： 2020 年 29 卷 7 期
页码：
收录情况： SCI
摘要： Insect predators, in general, play an important role in regulating pest populations in agricultural systems, but may be negatively affected by pesticides used in pest management. Convergent lady beetle, Hippodamia convergens Guerin-Meneville (Coleoptera: Coccinellidae) is known as an important biological control agent of soft-bodied insect pests. The development of Integrated Pest Management (IPM) program against insect pests requires an assessment of the side effect of insecticides on biological control agents. In the present work, we assessed the sublethal effects of an insect growth regulator, Pyriproxyfen (juvenile hormone mimic) on a common aphidophagous beetle, H. convergens by computing its demographic parameters through age-stage, two-sex life table theory. Present results showed that sublethal (LC10 and LC30) concentrations of tested insecticide prolonged the pre-adult developmental duration while adult longevity, fecundity and fertility were reduced following treatment compared with control. However, total pre-ovipositional period (TPOP) was declined with the increasing trend of insecticide concentration. In additions, population growth parameters such as intrinsic rate of increase r, finite rate of increase lambda and net reproductive rate R-0 were dramatically reduced in H. convergens population when they treated with sublethal concentrations pyriproxyfen. Therefore, the results obtained through this study reflected that pyriproxyfen impairs the population growth parameters and could reduce the biological services provided by H. convergens. Thus, more attention should be paid to the use of this insecticide in IPM program.
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