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Green peach aphid [ Myzus persicae (Sulzer) (Hemiptera: Aphididae)] control using Brassicaceae ethyl ester oil sprays
Author(s) -
Hansson D.,
Morra M. J.,
Borek V.,
Eigenbrode S. D.
Publication year - 2013
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/jen.12027
Subject(s) - myzus persicae , aphididae , biology , aphid , brassicaceae , rapeseed , ethyl ester , horticulture , hemiptera , botany , pest analysis , toxicology , chemistry , organic chemistry , homoptera
Control of green peach aphid ( M yzus persicae ), a globally important pest, using plant‐derived oils is a promising alternative to conventional insecticides. Although various plant‐derived oils are potentially useful for insect control, dose–response studies and efficacy comparisons among oils have not been widely reported. Our objective was to compare M . persicae control by plant‐derived oils, focusing on oils derived from B rassicaceae species that exhibit rotational and environmental quality benefits. We thus applied sprays of emulsified ethyl esters from the seed oils of yellow mustard ( S inapis alba ), oriental mustard ( B rassica juncea ) and rapeseed ( B rassica napus ) to M . persicae in a laboratory bioassay. A dose–response relationship was modelled for the S . alba spray yielding LD 50 / LD 95 values of 18.2 ± 0.87/128.1 ± 5.10 μg ester per cm 2 (P < 0.0001). Ethyl esters of oils from all three species and soybean ( G lycine max ) ethyl ester were compared to determine the efficacy of B rassicaceae oils relative to the dominant plant‐oil spray currently available. All ethyl esters were equally efficacious despite measured differences in fatty acid profiles among the oils. Oils derived from mustards B . juncea and S . alba are potentially useful feedstocks for the production of insecticidal sprays, and testing on additional insects is warranted.