Abstract

CHALE-CARRILLO, V. Manuel et al. Growth and response to Bemista tabaci in diferent Capsicum annuum genotypes inoculated with Brevibacillus brevis CBTC1. Agrociencia [online]. 2016, vol.50, n.3, pp.323-334. ISSN 2521-9766.

The plant growth promoting rhizobacteria are an alternative to reduce the use of chemical fertilizers as well as induce some degree of resistance to phytophagous insects. In this study the effect of the inoculation with the rizobacteria Brevibacillus brevis CBTC1 on growth and response to whitefly (Bemisia tabaci) in different genotypes of Capsicum annuum was evaluated. Experiments were established in a randomized design. In 15 repetitions (plants) the plant growth promoting variables were evaluated, and in four (composed by mixing foliage of five plants) foliar N evaluations were made. To assess the response of plants to B. tabaci, 20 repetitions (leaves) were used. The rizobacteria B. brevis CBTC1, an indole acetic acid producer, was isolated from soil from the state of Yucatan, Mexico. Inoculating the strain in four genotypes of C. annuum (Simojovel, Amaxito, Jalapeño and Х-kat ik) had significant effects on stem diameter, plant height, biomass, leaf number and root biomass in the Simojovel and Amaxito genotypes. Rizobacteria inoculation did not change the foliar N concentration or the attraction of B. tobaci adults in the evaluated genotypes. In contrast, the eggs density decreased in the Simojovel variety, and nymphal mortality increased in the Jalapeño.

Keywords : Rizobacteria; growth promoting; phytophagous insect.

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