Anais da Sociedade Entomológica do Brasil (1997) 26, 235-241

Fábio M.A. Silva, Harold G. Fowler and Raimunda N.S. Lemos (1997)
Parasitismo em Lagarta-do-Cartucho, Spodoptera frugiperda (Smith), na Região do Triangulo Mineiro, MG
[Parasitism associated with fall armyworm, Spodoptera frugiperda (Smith), in the Triangulo Mineiro Region, MG]
Anais da Sociedade Entomológica do Brasil 26 (2), 235-241
Abstract: The frequency and distribution of parasitoids associated with fall armyworm larvae, Spodoptera frugiperda (Smith), was observed in commercial maize (Zea mays) fields, in the 1991/92 and 1992/93 seasons in the Triangulo Mineiro Region, MG, Brazil. Two regions in the 1991/92 season and five regions in the 1992/93 season were chosen. In each farm 100 larvae were collected in plants with 20 to 40 days after emergence. Larvae were reared in the laboratory at 25 ± 2°C, 50-60% RH, 14 h - photoperiod and observed daily. The parasitoids more frequently observed were: Chelonus texanus (Cresson) (Hymenoptera: Braconidae), Diadegma sp. (Hymenoptera: Ichneumonidae), and Archytas incertus (Macquart) (Diptera: Tachinidae). The total parasitism ranged from 10.3% in 1991/92 to 13.8% in 1992/93. Dipteran parasitoids were more prevalent on fall armyworm pupae (76,5%), in 1991/92 and 1992/93. In 1991/ 92 season the hymenopteran parasitoids were more prevalent on the 3rd and 4th instars larvae (41.9 and 45.2%, respectively), and in 1992/93 on the 2nd and 3rd instars larvae (39.1 and 43.5%, respectively).
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera frugiperda	Maize/corn (Zea mays)	Brazil (south)
Chelonus insularis (parasitoid)	Spodoptera frugiperda	Maize/corn (Zea mays)	Brazil (south)
Archytas incertus (parasitoid)	Spodoptera frugiperda	Maize/corn (Zea mays)	Brazil (south)