Nutri??o e genética na ocorrência de pragas, inimigos naturais e ataque de minadoras em feij?o comum (Phaseolus vulgaris)

摘要

The objective was to?determine the occurrence of?pests, ladybugs?and the percentage of?larvae?mined?attack?common bean?grown?under?deficient and adequate?nitrogen. The study was conducted?at the Federal University?of Tocantins, in?12?genotypes of common bean?under?two?managements?of the element?nitrogen?(N) (with and without stress). To collect?samples?of insects?were made?by tapping?a?meter?per treatment?in?plastic tray?before and?after application?of insecticides. For the?sampling of?leaf miner?were?counted?the number of?leaves attacked by genotype.?Found?bug?Nezara?viridula,?sharpshooter?Empoaska?spp.,?cows Cerotoma arcuata?and Diabrotica?speciosa, ladybugs?Eriopis?connexa and?Cycloneda blood. There were no differences?between the number?of insect pests?found in the?bean?with and without stress?of N.?The ladybug?E.?connexa?was the one that?occurred.?Before applying?insecticides to?E.?connexa?occurred more?under stress?in plants?of N.?After insecticides?E. connexa?occurred more?stress-free?plants?of N.?The?leaf miner?attack was higher?in plants?without stress?N.?More leaves, the greater the?percentage of miner?attack?in bean?under stress?of N. Key-words: Nitrogen, plant defense, ladybug, leaf miner