Non-pesticides chemicals or alternative pest control methods. Field evaluation of non-pesticide chemicals as honey bee repellents | [Utilisation de produits chimiques non-pesticides ou méthodes alternatives de lutte contre les ravageurs. Evaluation en champ des produits chimiques non-pesticides en tant que répulsifs des abeilles]
2001
Mayer, D.F. ((Washington State University, Prosser (Etats-Unis). Irrigated Agriculture Research and Extension Center, Department of Entomology)) | Lunden, J.D. | Kovacs, G. | Miliczky, E.R.
Bee poisoning from pesticides is a serious problem worldwide. Major concern exists for the safety of honey bees (Apis mellifera L.) as valuable pollinators of many horticultural crops. One way of reducing the pesticide hazard to bees is to apply a chemical repellent that will discourage bees from foraging on crops for an interval after a bee hazard pesticide has been applied. During 1990-1998, we conducted field tests on blooming apples (Malus dornestica Borkh.), dandelions (Taraxacum officinale G. Weber, in Wiggers), buckwheat (officinale) and white Dutch clover (officinale) plants to evaluate their repellent effect to foraging honey bees. Evaluations were made by slowly walking through the plots and counting the number of honey bees (30 s/6.7 m/0.91 m swath) except for apples where they were counted by slowly moving around and counting the number of honey bees (30 s/1 tree) at 1 and 4 h. after application. We evaluated about 240 non-pesticide chemicals. Eleven chemicals significantly reduced the number of honey bee foragers at 1 h. after application but not at 4 h. In some tests, but not all, 10 chemicals significantly reduced the number of honey bee foragers at 1 h. after application but not at 4 h. One chemical significantly reduced the number of honey bee foragers at lh. and 4 h. after application. In some tests, but not all, 2 chemicals significantly reduced the number of honey bee foragers at 4 h. after application but not at 1 h.
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