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 Malec, Josef
Botanical insecticides are naturally occurring chemicals synthesized by plants for defend against herbivores. The aim was to verify the possibility of using natural insecticides to protect of cherries against cherry fruit fly (Rhagoletis cerasi L., 1758). In 2016, was evaluated the efficacy of three natural insecticides (spinosad, azadirachtin, pyrethrins) in the cherry orchards near the village of Bílé Podolí in the district of Kutná Hora (240 m a. s. l.). Their efficacy was compared with a synthetic insecticide (acetamiprid) and an untreated control. Insecticides were applied by cherry fruit fly adults caught on yellow sticky plates. Efficacy was evaluated in two periods, one week after the last treatment and during harvest maturity (June 23). Maximal efficacy of 100% was found after application of Piretro Verde (pyrethrins), and the product Mospilan (acetamiprid). Efficacy of preparation Spintor Fly (spinosad) was 95.83%, of preparation Neem Azal TS (azadirachtin) in combination with a food attractant was 83.33%. All used natural insecticides have shown efficacy in protection of cherries against cherry fruit fly.
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