Articles
PROSPECTS FOR THE USE OF VOLATILE CHEMICALS AND A NEW PYRROLE IN INTEGRATED PEST MANAGEMENT OF WESTERN FLOWER THRIPS
Article number
431_48
Pages
513 – 520
Language
Abstract
This paper reports on the effect of pyrrole (AC 303,630) on western flower thrips (WFT) (Frankliniella occidentalis) and the effect of volatile p-anisaldehyde and salicylic aldehyde on both thrips and beneficial insects captured on sticky traps. Two pyrrole doses were used (1.8 x 10-6 and 2.4 x 10-6 a.i.) under a standard biweekly spray schedule on greenhouse sweet peppers (cv.
Summy) at Ierapetra in April-May 1995. The volatile chemicals were used in a mixture with ethanol. The chemicals were impregnated into a cotton wool wick on both sides of a yellow sticky trap for 48 h on greenhouse cucumber (cv.
Delta) at Vori Messara in May 1995. Pyrrole was effective in controlling WFT, especially the larval stages. The reduction in WFT populations after two insecticide applications was 100% and 83.3% on leaves and 77.7% and 80.6% on flowers at 2.4 x 10-6 and 1.8 x 10-6 a.i., respectively. There was no significant difference between doses. The initial density of thrips on flowers was 7–9.5 times higher than on leaves. Both volatile chemicals attracted more adults than the control: p-anisaldehyde attracted 86.7% more adults; and salicylic aldehyde attracted 40.0% more adults. Both volatiles did not attract honey bees, syrphids, and anthrocorids (Orius sp.). The use of these chemicals as potential candidates for integrated pest management (IPM) programs under greenhouse conditions in Crete is discussed.
Summy) at Ierapetra in April-May 1995. The volatile chemicals were used in a mixture with ethanol. The chemicals were impregnated into a cotton wool wick on both sides of a yellow sticky trap for 48 h on greenhouse cucumber (cv.
Delta) at Vori Messara in May 1995. Pyrrole was effective in controlling WFT, especially the larval stages. The reduction in WFT populations after two insecticide applications was 100% and 83.3% on leaves and 77.7% and 80.6% on flowers at 2.4 x 10-6 and 1.8 x 10-6 a.i., respectively. There was no significant difference between doses. The initial density of thrips on flowers was 7–9.5 times higher than on leaves. Both volatile chemicals attracted more adults than the control: p-anisaldehyde attracted 86.7% more adults; and salicylic aldehyde attracted 40.0% more adults. Both volatiles did not attract honey bees, syrphids, and anthrocorids (Orius sp.). The use of these chemicals as potential candidates for integrated pest management (IPM) programs under greenhouse conditions in Crete is discussed.
Authors
N.E. Roditakis, D.P. Lykouressis
Keywords
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