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COMPARATIVE BIOLOGICAL DATA OF Spodoptera frugiperda (J. E. SMITH, 1797) (LEPDOTERA: NOCTUIDAE) IN COTTON AND MAIZE DADOS BIOLóGICOS COMPARATIVOS DE Spodoptera frugiperda (L. E. Smith, 1797) (LEPIDOPTERA, NOCTUIDAE) EM ALGODOEIRO E MILHO

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Identifica??o de fontes de resistência em cultivares de milho à spodoptera frugiperda (J. E. Smith, 1797) em casa-de-vegeta??o

DOI: 10.1590/S1516-89131999000100014

Keywords: resistance, zea mays, foliar damage, fall armyworm, larvae weight.

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Abstract:

two experiments were conducted in a greenhouse, with the objective of identifying sources of resistance in 15 corn cultivars to spodoptera frugiperda. the following cultivars were utilized cms-35 , cms-36, dina-70, cargill-525, pioneer-3210, pioneer-6875, br-201, br-451, ag-106, ag-510, cms-22, contimax-322, br-201, jatin? c3 an?o, cargill-511 e br-106. when the plants had 8 to 10 leaves they were infested with 30 newly ecloded larvae per plant. damage evaluation was made 10 to 14 days after infestation, in both experiments, using a visual note scale from 0 to 9. there were no statistical differences among cultivars for the parameters evaluated damage, weight, length and survival larvae. nevertheless a significant linear correlation was found between weigth x larvae length (n = 0,7776, p = 0,01), demonstrating that these parameters can be utilized in the study of corn resistence to s. frugiperda.

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