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Bragantia

versión impresa ISSN 0006-8705

Resumen

CAMPOS, Zeneide Ribeiro; BOICA JUNIOR, Arlindo Leal; LOURENCAO, André Luiz  y  CAMPOS, Alcebíades Ribeiro. Biological parameters of Bemisia Tabaci B biotype on cotton genotypes. Bragantia [online]. 2009, vol.68, n.4, pp. 1003-1007. ISSN 0006-8705.  http://dx.doi.org/10.1590/S0006-87052009000400021.

The silverleaf whitefly Bemisia tabaci B biotype is an important pest of many crops throughout the world. In Brazil, specifically in the Bahia State, this insect caused losses estimated to 30-70% on cotton crops. The purpose of this research was to investigate biological parameters of the silverleaf whitefly biotype B in genotype of cotton bush to verify a possible occurrence of antibiosis as resistance mechanism cotton, under greenhouse conditions. The duration of the egg and nymphal stages, and the adult longevity of B. tabaci biotype B were evaluated in the genotypes IAC-23, Coodetec 406, BRS Aroeira, Fabrika, Coodetec 407, IAC-24, Makina, IAC 20-233, Coodetec 401 and CNPA Acala I. Among those evaluated genotypes, Coodetec 406 increased the nymph stage (14.7 days) and IAC-23 reduced the nymphal viability (30.7%), suggesting the occurrence of antibiosis against this whitefly.

Palabras llave : silverleaf whitefly; Gossypium hirsutum L.; host plant resistance; antibiosis.

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