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Entomotropica
Sociedad Venezolana de Entomologia
ISSN: 1317-5262
Vol. 16, No. 2, 2001, pp. 73-78
Bioline Code: em01010
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Entomotropica, Vol. 16, No. 2, 2001, pp. 73-78

 en Evaluation of the preference of the sweet potato whitefly Bemisia tabaci check for this species in other resources (Gennadius) (Hemiptera: Aleyrodidae) in five agricultural crops
Pedro Morales, Mario Cermeli

Abstract

Morales P, Cermeli M. 2001. Evaluation of the preference of the sweet potato whitefly Bemisia tabaci check for this species in other resources (Gennadius) (Hemiptera: Aleyrodidae) in five agricultural crops. Entomotropica 16(2):73-78.

The sweet potato whitefly, Bemisia tabaci (Gennadius, 1889)(Hemiptera: Aleyrodidae) has caused severe damage in many crops worldwide. Due to the large list of susceptible plants, it is important to evaluate its preference for oviposition and nymphal development in crop plants. In this study observations were performed in a greenhouse on sesame ( Sesamum indicum check for this species in other resources L.), field beans ( Phaseolus vulgaris check for this species in other resources L.), cucumber ( Cucumis pepo check for this species in other resources L.), cantaloupe ( Cucumis melo check for this species in other resources L.) and tomato ( Lycopersicon esculentum check for this species in other resources Mill.), in a randomized block design with five treatments (crop) and four repetitions. The numbers of eggs and live and death nymphs per cm2 on the underside of the leaves in up to 14 leaves per plant, were counted four times. The higest number of eggs and live nymphs per cm2 were observed in tomato with 12.967 and 6.125 respectively, being statistically different from field beans (0.950 egg/cm2 and 0.869 nymphs/cm2) and cucumber (4.389 eggs/cm2 and 3.480 nymphs/cm2). The order of preference for oviposition and nymphal development was tomato>melon = sesame < cucumber = beans.

Keywords
bean, cucumber, host plant preference, melon, sesami, tomato.

 
 es Evaluación de la preferencia de la mosca blanca Bemisia tabaci check for this species in other resources (Gennadius) (Hemiptera: Aleyrodidae) en cinco cultivos agrícolas
Pedro Morales, Mario Cermeli

Resumen

Morales P, Cermeli M. 2001. Evaluación de la preferencia de la mosca blanca Bemisia tabaci check for this species in other resources (Gennadius) (Hemiptera: Aleyrodidae) en cinco cultivos agrícolas. Entomotropica 16(2):73-78.

La mosca blanca Bemisia tabaci (Gennadius, 1889) (Hemiptera: Aleyrodidae), ha causado estragos en la producción de rubros agrícolas a nivel mundial. Debido a la gran cantidad de hospederos que presenta el insecto en Venezuela, se evaluó la preferencia para oviposición y desarrollo ninfal del insecto en los cultivos de ajonjolí ( Sesamum indicum check for this species in other resources L.), caraota ( Phaseolus vulgaris check for this species in other resources L.), pepino ( Cucumis pepo check for this species in other resources L.), melón ( Cucumis melo check for this species in other resources L.) y tomate ( Lycopersicon esculentum check for this species in other resources Mill.), utilizando un diseño en bloques al azar, con cinco tratamientos (cultivos) y cuatro repeticiones, en umbráculo. Se evaluaron las densidades poblacionales de huevos, ninfas vivas y muertas por cm2 en el envés de hasta 14 hojas por cada cultivo, por medio de troquel de 1,8 cm de diámetro, en cuatro muestreos. Los mayores promedios de huevos (h) y ninfas vivas (nv) los presentó el cultivo de tomate, con 12,967 y 6,125, respectivamente, diferenciándose estadísticamente de los cultivos de caraota (0,950 h/cm2 y 0,869 nv/cm2) y pepino (4,339 h/cm2 y 3,480 nv/cm2). El orden de preferencia en los cultivos evaluados fue tomate > melón = ajonjolí > pepino = caraota.

Palabras-clave
ajonjolí, caraota, melón, pepino, preferencia de plantas hospederas, tomate.

 
© © 2001- Sociedad Venezolana de Entomología
Alternative site location: http://www.entomotropica.org

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