Resumo

MANZANO MARTINEZ, María del Rosario; MOSOS MARTINEZ, William Andrés  e  VELEZ MERA, Cristian Andrés. Bemisia tabaci biotype B in bean. Acta Agron. [online]. 2009, vol.58, n.4, pp.251-259. ISSN 0120-2812.

Life-history parameters of the whitefly Bemisia tabaci biotipo B were determined at laboratory conditions at 26 °C ± 2 °C y 80 ± 5 % de RH on bean ICA-Pijao. Mean longevity of the whitefly was 34 ± 1,64 days, mean total fecundity was 211,4 ± 15,1 eggs per female with a daily oviposition rate of 6,1 ± 0,28 eggs per day. Net reproduction rate was 137,8. Generation Time was 43,8 days and the intrinsic rate of population increase r_m was 0,125. These values are according to previous ones reported and support usefulness of ICA-Pijao bean for B. tabaci rearing. It was not possible to rear Amitus fuscipennis from B. tabaci. Behaviour studies showed that the parasitoid stayed only average 617,3 s on whitefly infested leaflets. It invested most of the time walking (46,4%), preening (35,6%) and standing still (16,7%). A. fuscipennis just touched accidentally one nymph once but it neither drummed it with the antenna nor laid an egg. Results indicated that A. fuscipennis is not a potential natural enemy of B. tabaci biotipo B.

Palavras-chave : Bemisia tabaci; sweet potato whitefly; population increase; biological control.

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