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Effects of methoxyfenozide on Lobesia botrana Den & Schiff (Lepidoptera: Tortricidae) egg, larval and adult stages

Saenz-de-Cabezon Irigaray, F.J., Marco, V., Zalom, F.G., Perez-Moreno, I.
Pest management science 2005 v.61 no.11 pp. 1133-1137
vineyards, Lobesia botrana, grapes, insect pests, ova, plant pests, mortality, Vitis vinifera, insect control, imagos, application rate, methoxyfenozide, larvae, Spain
The effect of the non-steroidal ecdysone agonist methoxyfenozide was evaluated against different developmental stages of the grape berry moth, Lobesia botrana Dennis & Schiffermuller (Lep, Tortricidae). Methoxyfenozide administered orally reduced the fecundity and fertility of adults treated with 1, 5 and 10 mg litre(-1); longevity was not affected. An LC50 value of 4.5 mg litre(-1) was obtained when applied to eggs of less than 1 day old. Surface treatment was more effective than when applied by spraying. Administered into the diet, methoxyfenozide had a larvicidal effect; older larvae were more susceptible than younger larvae, with LC50 values of 0.1 mg litre(-1) for L1, 0.04 for L3 and 0.02 for L5. Larvae treated with sub-lethal doses throughout their lives did not emerge as adults at the highest doses (0.08, 0.04, 0.02 and 0.01 mg litre(-1)), with 65% and 40% emergence occurring for the lowest (0.005 and 0.0025 mg litre(-1)). Mortality occurred only in the larval stage.