Control of Western flower thrips (Frankliniella occidentalis) on Verbena hybrida by irrigation of systemic insecticides
1996
Heungens, A. | Buysse, G. (Gent univ. (Belgium). Faculteit Landbouwkundige en Toegepaste Biologische Wetenschappen. Centrum voor de Studie van de Sierplantenteelt)
In a comparative control experiment against 'Western flower thrips' on Verbena hybrida the efficacy of 7 systemic insecticides added to the irrigation water of a pseudo-hydroponic system was evaluated. The insecticides used were acephate, methamidophos, omethoate, aldicarb, oxamyl, carbofuran and methomyl. The pesticide treatments consisted of three irrigations in one week of 100 ppm active ingredient. One week after the third irrigation the plants were examined for living larvae and adults of Frankliniella occidentalis. Adults could not be controlled by this technique, while the larval populations decreased very significantly compared to the control. Omethoate was the most effective insecticide with 90 / larval mortality, followed by methamidophos, acephate, carbofuran and methomyl
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