Efficacy of insecticides against Scaphoideus titanus in organic vineyards and their side effects | Efficacite d'insecticides contre Scaphoideus titanus en vignobles biologiques et effets secondaires
2008
Gusberti, M. | Jermini, M., Station de recherche Agroscope Changins-Waedenswil ACW, Contone (Switzerland). Centro di Cadenazzo | Wyss, E. | Linder, Ch.
Flavescence doree and the mandatory control of its vector Scaphoideus titanus are considered as important problems in organic vineyards. Our field studies conducted in the Ticino between 2006 and 2007 aimed at developping an alternative insect pest control strategy conform to the guidelines of organic production. Parexan N (pyrethrin + sesame oil) was the only organic product showing an efficacy higher than 90% against the immature stages of S. titanus. However, the product had no effect on adult leafhoppers. Repeated applications of Parexan N proved to be toxic against the predatory mite species Amblyseius andersoni. Despite this toxicity, the only efficient and recommended control strategy in organic vineyards is the application of Parexan N. It should be applied three times at an interval of ten days after the first appearance of individuals of the 3rd nymphal stage.
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Эту запись предоставил Agroscope Reckenholz-Tänikon Research Station