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Susceptibility of tomato borer, T uta absoluta ( M eyrick) ( L epidoptera: G elechiidae) populations from T urkey to 7 different insecticides in laboratory bioassay
Author(s) -
Dağlı F.,
İkten C.,
Sert E.,
Bölücek E.
Publication year - 2012
Publication title -
eppo bulletin
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.327
H-Index - 36
eISSN - 1365-2338
pISSN - 0250-8052
DOI - 10.1111/epp.2574
Subject(s) - indoxacarb , spinosad , abamectin , tuta absoluta , azadirachtin , biology , pest analysis , bioassay , toxicology , larva , integrated pest management , horticulture , pesticide , botany , agronomy , ecology , gelechiidae
The tomato borer, T uta absoluta ( M eyrick), was first recorded in T urkey in A ugust 2009 and rapidly became a serious pest in the M editerranean and A egean coastal regions in field and greenhouse grown tomatoes. Currently, insecticides are considered one of the major tools for the management of T . absoluta in T urkey. This study, investigated the efficacy of 7 different insecticides, against T . absoluta in laboratory bioassays. To determine the lethal concentration ( LC ) values and feeding activity of the larvae, tomato leaf parts mined by 1–3 day old L 1 larvae were dipped into different insecticide concentrations. Mortality was recorded 5 days after insecticide treatments. Spinosad, chlorantraniliprole + abamectin or indoxacarb treatment resulted in 100% mortality with minimal or no feeding in all populations at their recommended doses of 120, 50.4 and 60 mg a.s. L −1 , respectively. In general, the LC 99 values of populations for these insecticides were similar and also lower than that of the recommended field doses. The effect of pyridalyl was low, resulting in low mortality with serious feeding damage at the dose of 125 mg a.s. L −1 . The efficacies of abamectin, metaflumizone and azadirachtin were found to be moderate to low at the recommended doses (4.5, 240 and 50 mg a.s. L −1 , respectively). However, these insecticides may affect pupation and adult emergence rates hence further studies are recommended to investigate these insecticides.