Resistencia de variedades de algodón a Spodoptera frugiperda (Lepidoptera: Noctuidae)
Nenhuma Miniatura disponível
Data
2014-01-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Tipo
Artigo
Direito de acesso
Resumo
The fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) is a polyphagous pest species of cultivated plants. Changes in cotton crop systems are increasing the importance of this pest in cotton in the El Cerrado region of Brazil. This work aimed to evaluate resistance types of cotton (Gossypium hirsutum) varieties by nonpreference to oviposition and feeding along with antibiosis to S. frugiperda in the laboratory (27 ± 2 ºC, 70 ± 10% R.H. and photophase of 14 h). Two tests were performed to evaluate the non-preference to oviposition and feeding, one with free choice in a randomized block design and another in a completely randomized design. Leaves of the cotton varieties DeltaOpal®, NuOpal®, FMX 993®, FMT 701®, FMX 910® and FMX 996® were offered daily to S. frugiperda larvae. The presence of antibiosis was evaluated by the duration of each instar and of the larval and pupal stages, larval and pupal biomass, and adult longevity and fecundity. The NuOpal® variety was the most resistant to S. frugiperda. Spodoptera frugiperda fed on non-Bt cotton had heavier pupae and larvae, shorter development time for the larval stage, longer adult longevity, and a higher rate of oviposition and total viability when compared to the Bt cotton varieties.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Revista Colombiana de Entomologia, v. 40, n. 2, p. 158-163, 2014.