Invasive Species Compendium

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Abstract Full Text

Efficacy of spinosyns against lepidopteran pests of carnation.

Abstract

The bollworm Helicoverpa armigera (Hübner) and the South African moth Epichoristodes acerbella (Walker) are among the most dangerous pests of the carnation in Italy. In two trials, conducted in late summer in the years 2012 and 2013 in the Campania region, two spinosyn insecticides were compared with other insecticides for control of these moths on carnation. Treatments in 2012 consisted of two applications spaced 13 days of spinetoram at two rates (50 and 75 g/ha), chlorpyrifos-ethyl (520 ml/ha), emamectin benzoate (14 g/ha), methoxyfenozide (120 ml/ha) followed by chlorpyrifos-ethyl (520 ml/ha). Except for chlorpyrifos-ethyl, the same treatments were used in 2013, but with 10 days interval and adding spinosad at two rates (96 and 120 ml/ha), indoxacarb (37.5 g/ha) and methoxyfenozide alone. Both treatments with spinetoram gave complete control of the moths in 2012, while the average attack reduction was 81% for treatments with the other insecticides. The two spinosyn insecticides showed lower efficacy in 2013, with comparable average attack reductions of 84-86%, but still higher than those of methoxyfenozide (81%), emamectin benzoate (78%), indoxacarb (78%), methoxyfenozide followed by chlorpyrifos-ethyl (77%).