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- W2000354301 abstract "In 1999, in the Governorate of Fayum, Egypt, an organically managed area of 66 ha (33 ha of cotton) was subjected to pheromone mating disruption (MD) in order to control Pectinophora gossypiella (PBW). Tripherone-PecGos dispensers (Trifolio-M Comp., Lahnau, Germany), evaporating 0.7 mg pheromone per day, were applied, at a density of 300 dispensers per hectare, in mid-June when the first bolls were forming. In a neighbouring area of conventional agriculture, no PBW-MD was used. Instead, two insecticides were sprayed in the cotton fields: Profenophos in early July, and Esfenvalerate in early August. Two cotton fields (0.5–1 ha each) were studied in each area. Boll infestation by PBW was low in the area with mating disruption, and significantly higher in the conventionally managed cotton, prior to insecticide use (June) and in August 1999. Bemisia tabaci, Aphis gossypii and Empoasca lybica infested conventional cotton in significantly higher numbers than organic cotton. Spiders proved to be more common in organically grown cotton (with PBW-MD) than in conventionally managed cotton (with mineral fertilizers and insecticides). The reasons of these differences are discussed. In 1998, the cotton yield had shown no differences between organically and conventionally managed farms (both used insufficient PBW-MD). However, in 1999, the yield from the organically grown cotton (with MD) was significantly (52%) more than that from conventionally managed cotton (with insecticides). In this study, PBW-MD proved to be superior to insecticides in several aspects." @default.
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- W2000354301 date "2001-07-01" @default.
- W2000354301 modified "2023-09-28" @default.
- W2000354301 title "Studies in cotton fields in Egypt on the effects of pheromone mating disruption on Pectinophora gossypiella (Saund.) (Lep., Gelechiidae), on the occurrence of other arthropods, and on yields" @default.
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- W2000354301 doi "https://doi.org/10.1046/j.1439-0418.2001.00545.x" @default.
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