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Evaluación de la Eficacia, Efecto Residual y de Volteo de Aplicaciones en Pretrasplante de Insecticidas Nicotinoides y Mezclas de Nicotinoide-Piretroide para el Control de Myzus persicae nicotianae (Hemiptera: Aphididae) en Tabaco Evaluation of Efficacy, Residual and Knock Down Effects of Pretransplant Applications of Nicotinoid and Nicotinoid-Pyrethroid Insecticide Mixtures for the Control of Myzus persicae nicotianae (Hemiptera: Aphididae) on tobacco

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Evaluación de la Eficacia, Efecto Residual y de Volteo de Aplicaciones en Pretrasplante de Insecticidas Nicotinoides y Mezclas de Nicotinoide-Piretroide para el Control de Myzus persicae nicotianae (Hemiptera: Aphididae) en Tabaco

DOI: 10.4067/S0365-28072007000100002

Keywords: imidacloprid, thiamethoxam, acetamiprid, cyfluthrin.

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Abstract:

pretransplant applications of imidacloprid, acetamiprid and thiamethoxam, and a mixture of imidacloprid and cyfluthrin were evaluated on tobacco (nicotiana tabacum l.) seedbeds for the control of the aphid myzus persicae nicotianae blackman. corrected mortality at 48 h after aphid release on plants in a seedbed was over 80% almost permanently up to 75 days after application (daa) with a dose of 14 g a.i. m-2 seedbed of imidacloprid. in another experiment, the same level of corrected mortality was maintained by doses of 5.6 g a.i. m-2 seedbed of acetamiprid and 7 g a.i. m-2 seedbed of thiamethoxam up to 50 and 30 daa, respectively. after 30 daa for all the insecticides evaluated in both experiments, corrected mortality at 24 h was lower than at 48 h after aphid release on treated plants, which shows a limited knock down effect of these treatments. finally, in another experiment a mixture of 10.5 and 0.21 g a.i. m-2 seedbed of imidacloprid and cyfluthrin, respectively, showed a good knock down effect, with corrected mortality higher than 80% up to 70 daa at 48 h and without significant differences with corrected mortality at 24 h after aphid release on plants.

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