Abstract
Several pesticides were tested in the laboratory for their side-effects upon the mirid bugDicyphus tamaninii, a polyphagous predator used for IPM programmes in some vegetable crops. Residual toxicity to 3rd -4th instar nymphs on tomato leaflets was checked 24, 48 hours and seven days after treatment. The acaricides bromopropylate, dicofol+tetradifon and fenpyroximate were harmless to the nymphs. The insect growth regulators azadirachtin, buprofezin, lufenuron and pyriproxyfen were also harmless to nymphs and teflubenzuron was slightly harmful seven days after treatment. Among the conventional insecticides tested, only pirimicarb and tau-fluvalinate were harmless toD. tamaninii nymphs
Résumé
L’effet résiduel de différents insecticides et acaricides sur les nymphes deDicyphus tamaninii a été évalué en conditions de laboratoire.D. tamaninii est un prédateur polyphage ; ce miride est utilisé dans les programmes de lutte intégré contre les insectes nuisibles de différentes cultures maraîchères. La toxicité résiduelle des différents produits appliqués sur foliole de tomate a été évaluée sur le 3e et le 4e stade nymphal du miride. Le contrôle de la mortalité a été fait 24, 48 heures et 7 jours après l’application du produit. Les acaricides, bromopropilate, dicofol-tétradifon et fenpyroximate ont été peu toxiques pour les nymphes. Les régulateurs de la croissance des insectes, azadirachtine, buprofézine, lufénuron et pyriproxyfène se sont aussi avérés peu toxiques et le téflubenzuron l’a été légèrement pour les nymphes sept jours après l’application du produit. Parmi les insecticides conventionnels utilisés seuls le pyrimicarbe et le tau-fluvalinate ont été peu toxiques pour les nymphes deD. tamaninii
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Castañé, C., Arino, J. & Arno, J. Toxicity of some insecticides and acaricides to the predatory bugDicyphus tamaninii (Het.: Miridae) . Entomophaga 41, 211–216 (1996). https://doi.org/10.1007/BF02764246
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DOI: https://doi.org/10.1007/BF02764246