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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 71, No. 3, 2011, pp. 383-389
Bioline Code: cj11046
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 71, No. 3, 2011, pp. 383-389

 en HOSTING CAPACITY OF HORTICULTURAL PLANTS FOR INSECT PESTS IN BRAZIL
Leite, Germano L.D.; Picanço, Marcelo; Zanuncio, José C.; Moreira, Márcio D. & Jham, Gulab N.

Abstract

Factors such as fertilization, allelochemicals, trichomes, weather, and natural enemies can influence pest populations. Thus, it is necessary to understand the factors that predispose vegetable species to pests and the role of polyculture, crop rotation, and neighboring plants. The objective of this research was to study the hosting capacity for pests of Abelmoschus esculentus check for this species in other resources (L.), Brassica oleracea check for this species in other resources L. vars. acephala and capitata, Capsicum annuum check for this species in other resources L., Cucurbita moschata check for this species in other resources (Duchesne), Cucurbita maxima check for this species in other resources Duchesne and Cucumis sativus check for this species in other resources L., Lycopersicon esculentum check for this species in other resources Mill., Solanum gilo check for this species in other resources Raddi and Solanum melongena check for this species in other resources L., and Phaseolus vulgaris check for this species in other resources L. The higher density of Bemisia tabaci check for this species in other resources (Genn.) adults on C. sativus can be due to the higher amount of pentacosane and octacosane in this plant. The occurrence of Brevicoryne brassicae check for this species in other resources (L.) only in Brassica spp. can be accounted for by the nonacosane of these plants. The low trichome density and greater palmitic acid level can explain the greatest damage by Aphis gossypii check for this species in other resources Glover in A. esculentum. Empoasca sp. was more frequent in P. vulgaris followed by A. esculentum, which are plants with lower K content. Solanum melongena check for this species in other resources was attacked more by Hydrangea similis check for this species in other resources (Walker) and Epitrix sp. perhaps because of higher palmitic acid and 11,14,17-eicosatrienoic methyl ester concentrations in their leaves. Frankliniella sp. exhibited more damage in C. sativus probably owing to higher pentacosane and octacosane in its leaves. Sistena sp. was more frequent in C. maxima and had higher octadecane levels and trichome density. The presence of ∞-humulene and hexacosane can explain the damage by Tuta absoluta check for this species in other resources (Meyrick) on L. esculentum.

Keywords
Trichomes, allelochemicals, nitrogen, potassium, insects

 
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