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

作者：Otieno Jacinter Atieno^*; Pallmann Philip; Poehling Hans Michael

来源：BioControl, 2017, 62(1): 85-95.

DOI：10.1007/s10526-016-9767-7

• Frankliniella occidentalis
• Integrated biocontrol
• Entomopathogenic fungi
• Entomopathogenic nematodes
• NeemAzal-T solution

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(A (R)) 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.

• 出版日期2017-2