Control of the cherry fruit fly: alternatives to dimenthoate | Alternatives au diméthoate pour lutter contre la mouche de la cerise
2012
Höhn, H. | Walder, R. | Mühlenz, I. | Samietz, J. | Linder, Ch., Station de recherche Agroscope Changins-Waedenswil ACW, Waedenswil (Switzerland)
In 2011, the efficacy of two insecticides registered in Switzerland for chemical control of the European cherry fruit fly (Rhagoletis cerasi), thiamethoxam (Actara) and acetamiprid (Gazelle SG), was compared to the former standard dimethoat (several products) in commercial orchard trials on 20 Swiss fruit farms. Dimethoat and thiamethoxam were each applied once three weeks before harvest. Acetamiprid was applied twice at an interval of 14 days and with a waiting period of again two weeks. All three insecticides resulted in a sufficient efficacy and thereby damage was below the limit required in practice. Insect exclusion netting (1.3 mm net) was equally effective in protecting the crop from damage if the nets were kept closed from colour change of the fruit (from yellow to pink) until harvest. Additional phenological experiments showed that eggs were laid on the fruit only from colour change on but also from then until harvest.
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