An attract and kill tactic for click beetles based on Metarhizium brunneum and a new formulation of sex pheromone

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• 作者：J. Todd Kabaluk ; J. P. Lafontaine ; John H. Borden
• 关键词：Wireworm ; Elaterid ; Agriotes ; Biocontrol ; Entomopathogen ; Mating disruption
• 刊名：Journal of Pest Science
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：88
• 期：4
• 页码：707-716
• 全文大小：949 KB
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• 作者单位：J. Todd Kabaluk (1)
  J. P. Lafontaine (2)
  John H. Borden (2)
  
  1. Agriculture and Agri-Food Canada, Pacific Agri-Food Research Centre, Box 1000, 6947 No. 7 Hwy., Agassiz, BC, V0 M 1A0, Canada
  2. Scotts Canada Ltd., 7572 Progress Way, Delta, BC, V4G 1E9, Canada
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Agriculture
  Plant Pathology
  Plant Sciences
  Ecology
  Forestry
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1612-4766

文摘

Wireworms are a serious agricultural pest, with control efforts targeting soil-dwelling larvae almost exclusively. They appear yearly for a brief period as adult click beetles to mate and oviposit, and as adults, possess qualities that make them good candidates for an attract and kill control tactic: (i) susceptibility to certain entomopathogenic fungi; and (ii) attraction of males to female sex pheromones. To expand the range of wireworm control options, our study aimed to determine if banded applications of a new granular formulation of Agriotes obscurus L. (Coleoptera: Elateridae) pheromone would increase beetle mortality when applied with banded Metarhizium brunneum Petch (Ascomycota: Hypocreales: Clavicipitaceae) LRC112. Pheromone granules applied at 12.7 kg/ha (1 % wt/wt 1:1 geranyl hexanoate:geranyl octanoate) together with rice conidiated with 2 × 1014 conidia/ha of M. brunneum LRC112 reduced beetle recapture by 98.2 % compared to M. brunneum alone. A lower rate (2 × 1013 conidia/ha) of M. brunneum with pheromone granules reduced recapture by 82.6 % compared to the lower rate alone. A significantly greater number of beetles aggregated at pheromone bands to acquire lethal doses of conidia in as little as 6 h, with conidia dose remaining unchanged up to 54 h later. Conidia dose acquired by beetles corresponded to treatment and was positively related to total beetle mortality and speed of death. Attracting and killing click beetles might represent a new tactical approach to control wireworm larvae by reducing click beetle fecundity. We expect the pheromone granules to also to have utility for click beetle mating disruption. Keywords Wireworm Elaterid Agriotes Biocontrol Entomopathogen Mating disruption