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No. de sistema: 000033467

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 040908m20039999enkqr^p^^^^^^z0^^^z0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-cp
044 _ _ a| enk
245 0 0 a| Effect of weeds on insect pests of maize and their natural enemies in Southern Mexico
520 1 _ a| A pilot study performed on the Pacific coastal plain of Chiapas, Mexico, focused on the prevalence of maize crop infestation by insect pests, parasitism of pests and the abundance of insect predators in maize plots with weeds compared with plots under a regime of rigorous manual weed control. Sampling was conducted on four occasions at 20, 32, 44 and 56 days post-planting. Infestation of maize by fall armyworm larvae, Spodoptera frugiperda (Lepidoptera: Noctuidae), was more than twice as great in plots with strict weed control compared with weedy plots at 20 days post-planting, but declined thereafter in both treatments. The prevalence of aphid infestation and the abundance of nitidulid beetles were consistently greater in weed-controlled plots. In contrast, the density of beneficial predatory Coleoptera increased significantly in plots with weeds, and it is suggested that this probably explains the lower incidence of pests. S. frugiperda egg masses placed in experimental plots suffered a significantly higher incidence rate of parasitism by Chelonus insularis (Hymenoptera: Braconidae) in clean plots (42.0%) compared with those placed in weedy plots (3.75%); it is suspected that weeds may hinder the location of egg masses by parasitoids. Overall, the presence or absence of weeds had a marked influence on the arthropod community present in maize fields. The weeds did not affect maize plant height, the levels of plant damage or the yield of grain from plants under each type of weed regime, implying that competitive effects of weeds may be offset by greater numbers of beneficial insects in weedy plots. Our pilot study indicates that strict weed control in maize may be unnecessary.
538 _ _ a| Adobe Acrobat profesional 6.0 o superior e Internet
650 _ 4 a| Control de malezas
650 _ 4 a| Maíz
650 _ 4 a| Control de plagas
651 _ 4 a| Chiapas (México)
700 1 _ a| Penagos Torres, Dora Isabel
700 1 _ a| Magallanes Cedeño, Ricardo
c| Dr.
e| coaut.
700 1 _ a| Valle Mora, Javier Francisco
e| coaut.
n| 7101953229
700 1 _ a| Cisneros Hernández, Juan
e| coaut.
700 1 _ a| Martínez, A. M.
e| coaut.
700 1 _ a| Goulson, D.
e| coaut.
700 1 _ a| Chapman, Jason W.
e| coaut.
700 1 _ a| Caballero, P.
e| coaut.
700 1 _ a| Cave, Ronald D.
e| coaut.
700 1 _ a| Williams, Trevor
e| coaut.
773 0 _
t| International Journal of Pest Management
g| Vol. 49, no. 2 (Abril-June 2003), p. 155-161
x| 0967-0874
900 _ _ a| En hemeroteca, SIBE-Tapachula
901 _ _ a| Artículo con arbitraje
902 _ _ a| IOG/GOG / MM
904 _ _ a| Septiembre 2004
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| CRIIS
905 _ _ a| Biblioelectrónica
LNG eng
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*En hemeroteca, SIBE-Tapachula
Effect of weeds on insect pests of maize and their natural enemies in Southern Mexico
Penagos Torres, Dora Isabel (autor)
Magallanes Cedeño, Ricardo (autor)
Valle Mora, Javier Francisco (autor)
Cisneros Hernández, Juan (autor)
Martínez, A. M. (autor)
Goulson, D. (autor)
Chapman, Jason W. (autor)
Caballero, P. (autor)
Cave, Ronald D. (autor)
Williams, Trevor (autor)
Contenido en: International Journal of Pest Management. Vol. 49, no. 2 (Abril-June 2003), p. 155-161. ISSN: 0967-0874
Bibliotecas:
Tapachula
No. de sistema: 33467
Tipo: - Artículo con arbitraje
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Inglés

"A pilot study performed on the Pacific coastal plain of Chiapas, Mexico, focused on the prevalence of maize crop infestation by insect pests, parasitism of pests and the abundance of insect predators in maize plots with weeds compared with plots under a regime of rigorous manual weed control. Sampling was conducted on four occasions at 20, 32, 44 and 56 days post-planting. Infestation of maize by fall armyworm larvae, Spodoptera frugiperda (Lepidoptera: Noctuidae), was more than twice as great in plots with strict weed control compared with weedy plots at 20 days post-planting, but declined thereafter in both treatments. The prevalence of aphid infestation and the abundance of nitidulid beetles were consistently greater in weed-controlled plots. In contrast, the density of beneficial predatory Coleoptera increased significantly in plots with weeds, and it is suggested that this probably explains the lower incidence of pests. S. frugiperda egg masses placed in experimental plots suffered a significantly higher incidence rate of parasitism by Chelonus insularis (Hymenoptera: Braconidae) in clean plots (42.0%) compared with those placed in weedy plots (3.75%); it is suspected that weeds may hinder the location of egg masses by parasitoids. Overall, the presence or absence of weeds had a marked influence on the arthropod community present in maize fields. The weeds did not affect maize plant height, the levels of plant damage or the yield of grain from plants under each type of weed regime, implying that competitive effects of weeds may be offset by greater numbers of beneficial insects in weedy plots. Our pilot study indicates that strict weed control in maize may be unnecessary."

SIBE Tapachula
Codigo de barra
Estado
Colección
B3103
(Disponible)
Artículos de investigación ECOSUR

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