Additive and synergistic interactions amongst Orius laevigatus (Heteroptera: Anthocoridae), entomopathogens and azadirachtin for controlling western flower thrips (Thysanoptera: Thripidae)

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• 作者：Jacinter Atieno Otieno ; Philip Pallmann ; Hans-Michael Poehling
• 关键词：Frankliniella occidentalis ; Integrated biocontrol ; Entomopathogenic fungi ; Entomopathogenic nematodes ; NeemAzal ; T solution
• 刊名：BioControl
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：62
• 期：1
• 页码：85-95
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Entomology; Plant Pathology; Agriculture; Animal Ecology; Animal Biochemistry; Behavioral Sciences;
• 出版者：Springer Netherlands
• ISSN：1573-8248
• 卷排序：62

文摘

This study evaluated the efficacy of the foliage-dwelling predator Orius laevigatus, soil applied entomopathogens and azadirachtin alone and in combinations for controlling western flower thrips (WFT). Evaluated products were Nemastar®Steinernema carpocapsae (E-nema) and O. laevigatus (Re-natur), Metarhizium anisopliae isolate ICIPE-69 and NeemAzal-T (azadirachtin) (Trifolio). Efficacy against WFT was significantly improved by combined treatments achieving 62–97 % reduction in WFT emergence, compared to 45–74 % in single treatments, and interactions resulted in two synergistic and eight additive responses. Metarhizium-based treatments reduced WFT survival by 93–99.6 % when late mortality by mycosis was considered. Halving the number of released predators did not significantly reduce efficacy (86–96 vs. 76–88 % thrips reduction), and when Orius was introduced to target L1 of WFT, 96–98 % reduction was achieved while only 71–89 % for L2. Early release of O. laevigatus and combination with soil application of NeemAzal-T and/or entomopathogens can be a successful and reliable biocontrol strategy for WFT.