resistência de genótipos de milho para cultivo em várzeas subtropicais à lagarta-do-cartucho spodoptera frugiperda resistance of corn genotypes for subtropical lowland cropping to fall armyworm spodoptera frugiperda

Clicks: 276
ID: 224933
2008
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Abstract
Spodoptera frugiperda é uma das pragas com elevado potencial para causar perdas econômicas na cultura do milho, no ecossistema de várzeas subtropicais. Com o objetivo de identificar fontes de resistência, foi avaliado, em laboratório, o desenvolvimento de S. frugiperda em nove genótipos de milho. Cem lagartas recém-eclodidas foram individualizadas em tubos de vidro, contendo porções de folhas de milho, mantidos à temperatura de 25±1°C, umidade relativa de 70±10% e fotofase de 14h. Avaliaram-se a duração e a viabilidade das fases de larva e pupa, o peso de larvas e de pupas e a mortalidade larval. Dentre os genótipos avaliados, destacaram-se o BRS Missões-B e o BR 111 VI Sel. Dent C, os quais afetaram, respectivamente, o desenvolvimento da fase de larva e de pupa.
Spodoptera frugiperda is the most important pest of the corn culture, causing high leaf losses. With intention to identify possible resistance sources, it was evaluated the effect of nine maize genotypes on the development of S. frugiperda in laboratory. One hundred newly-hatched larvae were individualized in glass tubes containing leaves, maintained under temperature of 25±1°C, relative humidity of 70±10% and photophase of 14h. Larval and pupal developmental time, survivorship and weight and larval mortality at 16 days were evaluated. It was observed that the genotypes BRS Missões-B and BR 111 VI Sel. Dent C affected the larval and pupal development, respectively.
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Authors ;Uemerson Silva da Cunha;José Francisco da Silva Martins;Marilda Pereira Porto;Mauro Silveira Garcia;Oderlei Bernardi;Calisc de Oliveira Trecha;Daniel Bernardi;Edson de Oliveira Jardim;Evandro Carlos Uhlmann Back
Journal Trials
Year 2008
DOI
10.1590/S0103-84782008000400034
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000400034
Keywords
zea mays host plant resistance preferenceagricultureagriculture (general)

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