Revista Colombiana de Entomología (2014) 40, 158-163

Flávio Gonçalves de Jesus, Arlindo Leal Boiça Junior, Gleina Costa Silva Alves, Antonio Carlos Busoli and José Cola Zanuncio (2014)
Resistance of cotton varieties to Spodoptera frugiperda (Lepidoptera: Noctuidae)
Revista Colombiana de Entomología 40 (2), 158-163
Abstract: 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 non-preference 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.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): José Cola Zanuncio

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera frugiperda	Cotton (Gossypium)