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摘要
O objetivo do trabalho foi verificar o efeito de tratamentos inseticidas, na produ o e no controle da dissemina o de v赤rus por af赤deos vetores e o teor de res赤duos observados nos tub谷rculos submetidos a esses tratamentos. Foram empregadas as cultivares,芍gata e Emeraude com Potato v赤rus Y. O modelo utilizado foi o de blocos inteiramente casualizados, com 12 tratamentos e 4 repeti es, sendo: 1) pulveriza o semanal (PS), com a 迆ltima aos 55 dias ap車s o plantio (DAP); 2) PS com a 迆ltima aos 69 DAP; 3) PS, com a 迆ltima aos 69 DAP + aplica o de Cabrio Top; 4) pulveriza o a cada cinco dias, sendo a 迆ltima aos 69 DAP; 5) PS sendo a 迆ltima aos 80 DAP e 6) controle, sem pulveriza o, todos combinados com dois tratamentos de sulco (Imidacloprid e Phorate). Observou-se que a maioria dos tratamentos n o impediu a dissemina o dos v赤rus. The objective the work was to investigate the effect of insecticide treatments on virus spread and in potato yield, as well as to evaluate the residue value of the insecticides employed in the tuberssubjected to these treatments. The experiment was carried out with two cultivars in randomized blocks with 40 tubers, 4 replications and 12 treatments, as follows: 1) insecticide spraying (SI) on leaves once a week, with the last application at 55 days after planting (DAP); 2) SI on leaves once a week, with the last application at 69 DAP; 3) SI on leaves once a week, with the last application at 69 DAP + application of Cabrio Top; 4) SI on leaves every five days, with the last application at 69 DAP; 5) SI on leaves once a week, with the last application at 80 DAP; and 6) control, with no insecticides after plant emergence; and all of them combined with 2 soil treatments (Imidacloprid and Phorate). Those results show that theapplication of insecticides is useless when the potato seed has a high PVY incidence.
