Factors affecting attack rate of whitefly on the eggplant

Abstract

The objective of this study was to determine the effects of weather, predators and parasitoids, canopy height and plant age, leaf chemical composition, levels of leaf N and K and leaf trichomes on the intensity of Bemisia tabaci attack on Solanum melongena. A higher density of nymph and whitefly adults was recorded at the base and medium of the plant compared to the apex. A higher number of eggs was observed on the medium part than on the apical and base part of the plants dossel. An increase in the density of whitefly is associated with an increase in temperature.Index terms: Bemisia tabaci, Solanum melongena, allelochemicals, parasitoids, air temperature. Fatores que influenciam a taxa de ataque de mosca-branca em berinjelaResumo O objetivo deste estudo foi determinar os efeitos de clima, predadores e parasitóides, altura de dossel e idade de plantas, composição química foliar, níveis foliares de N e de K e tricomas foliares na intensidade de ataque de Bemisia tabaci em Solanum melongena. A maior densidade de ninfas e de adultos de mosca-branca foi observada nos terços basal e mediano, comparada ao ápice da planta. O maior número de ovos foi observado no terço mediano comparado aos terços apical e basal do dossel das plantas. Um aumento na densidade de mosca-branca está associado com um aumento na temperatura.Termos para indexação: Bemisia tabaci, Solanum melongena, aleloquímico, parasitóide, temperatura do ar.

Breeding for Enhancing Legumovirus Resistance in Mungbean: Current Understanding and Future Directions

“…Feeding of whiteflies may vary depending on the angle of trichome to the leaf surface, as well as varying based on leaf color, length, and plant variety [73]. Leite et al [74] reported a non-occurrence of oviposition by B. tabaci on the apical leaves of eggplant with high trichome density. A significant negative correlation between the number of leaf hairs per unit area and whitefly count has also been reported in pumpkin [75].…”

Hosting Capacity of Horticultural Plants for Insect Pests in Brazil

“…Nutritional and morphological features, organic compound levels, and natural enemies do not explain the highest density of B. tabaci on eggplant because none of these characteristics are unique for these plants. The highest occurrence of B. tabaci in eggplant can be due to planting time because the warmer periods of the year were positively correlated with this pest in most crops (r = 0.49, P = 0.0000) as found by Leite et al (2003). This agrees with the survival rate of 88.7, 60.2, 67.5, 46.4, and 45.8% of B. argentifolii juveniles on S. melongena, L. esculentum, Ipomoea batatus (L.), C. sativus, and P. vulgaris, respectively (Tsai and Wang, 1996).…”

Review of the tribe Chilocorini Mulsant from Iran (Coleoptera, Coccinellidae)

“…Nontheless, there are some reports about some species of the genus feeding on aleyrodids e.g., Exochomus bimaculosus Mulsant which feeds on Bemisia tabaci (Gennadius) (Yigit 1992, Leite et al 2003, Hodek and Honěk 2009). …”