Evaluation of biorational pesticides for use in arboriculture.
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Pest control in urban and community forests is undergoing rapid change in Canada and The United States of America. Anyone who has been involved in pest control during the past 20 years realizes that the rules for pesticide use and their availability have been and are changing. Improved ability to detect minute amounts of pesticide residue, environmental awareness and activism, and increased demand for higher quality landscapes require creativity in terms of pest control approaches and products. Impending legislation and changing consumer attitudes mandate reduction in use of conventional pesticides in landscape maintenance. Biorational insecticides and acaricides, including horticultural oils, insecticidal soaps, bacterial preparations, and entomogeneous nematodes are under increasing development and are being used more widely in arboriculture. Results of investigation s with some of these biorational products against important pests of trees and shrubs are reported. Resume. Le controle antiparasitaire dans les forets urbains change rapidement au Canada et aux Etats-Unis. Quiconque a ete implique dans le controle antiparasitaire dans les demiers 20 ans realise que les regies d'utilisation des pesticides et leur disponibilite ont change et changent encore. La capacite amelioree de detecter des taux residuels de pesticides, la conscientisation et I'implication environnementale et une demande grandissante pour des am6nagements paysagers de haute qualite requierent de la creativite dans les approches et les produits de controle antiparasitaire. Une legislation plus feroce et les attitudes changeantes des consommateurs imposent une reduction de I'utilisation des pesticides conventionnels dans I'entretien des amenagements. Des insecticides et des acaricides biorationnels, incluant les huiles, sel savons insecticides, les preparations bacteriologiques et des nematodes se developpant dans les insectes sont en developpement croissant et sont utilises plus largement en arboriculture. Les resultats de recherches avec quelques- uns des produits biorationnels contre des parasites importants des arbres et des arbustes sont presentes.
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