Acta Agrestia Sinica ›› 2018, Vol. 26 ›› Issue (1): 184-188.DOI: 10.11733/j.issn.1007-0435.2018.01.022

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Grasshopper Control by Combined Application of Paranosema locustae and an Insect Growth Regulator in Rangelands

XING Xue-jun   

  1. Qinghai Rangeland Work Station, Xining, Qinghai Province 810008, China
  • Received:2016-06-21 Revised:2018-03-13 Online:2018-02-15 Published:2018-05-25

蝗虫微孢子与昆虫生长调节剂协同控制草原蝗虫作用机制

星学军   

  1. 青海省草原总站, 青海 西宁 810008
  • 作者简介:星学军(1968-),男,青海西宁人,高级畜牧师,主要从事草地植保技术研究,E-mail:326818279@qq.com
  • 基金资助:

    国家自然科学基金项目(31772221);国家重大专项计划(2017YFD0201200)资助

Abstract:

Grasshopper is an main insect of destroying rangelands. Paranosema locustae (PL) is a biological agent controlling grasshoppers. The studies on grasshopper control by combined application of PL and an insect growth regulator (IGR) in rangelands are helpful for sustainable control of grasshoppers. The experiments of grasshopper control by combined with IGR) and PL were performed in Qinghai lake rangeland of Qinghai. The investigation found that main species in Qinghai lake rangeland included Myrmeleotettix palpalis, Chorthippus fallax, Chorthippus dubius, Dasyhippus harbipes, and Angaracris barabensis. The results in the experimental field showed that the coordinating application PL with IGR Cascade insecticide had significant effect on controlling grasshoppers, and survival grasshoppers showed higher infection, which kept sustainable effects on main grasshoppers, such as M. palpalis and C. fallax. The results demonstrated the mechanisms of combined application of bio-agents and IGR for controlling grasshoppers, and provided a new scientific way for controlling high density of grasshoppers.

Key words: Grasshopper, Biocontrol, Coordinative effect, Infection, Paranosema locustae, IGR

摘要:

蝗虫微孢子(Paranosema locustae, PL是重要的防蝗生物制剂,其与昆虫生长调节剂(insect growth regulator, IGR)协同使用有利于蝗虫可持续治理。本文通过田间超低喷雾和扫网调查等方法在青海蝗区开展协调应用PL和IGR防治草原蝗虫的作用及其机理研究。首先明确青海蝗区的主要蝗虫种类为宽须蚁蝗Myrmeleotettix palpalis、小翅雏蝗Chorthippus fallax、狭翅雏蝗Chorthippus dubius、毛足棒角蝗Dasyhippus harbipes、鼓翅皱膝蝗Angaracris barabensis等;结果证明PL与IGR协调应用,可有效抑制草原蝗虫种群增长,且可保持存活蝗虫感病率在较高水平,对优势种宽须蚁蝗和小翅雏蝗等的持续控制作用明显。结果明确了微生物制剂和IGR协同防治蝗虫的短期与长期、速效与长效的协同作用,为防治高密度蝗虫提供新的绿色防控策略。

关键词: 蝗虫, 生物防治, 协同作用, 感病率, 蝗虫微孢子, 卡死克

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