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BioMed Research International
Volume 2013 (2013), Article ID 184756, 7 pages
http://dx.doi.org/10.1155/2013/184756
Research Article

Beauveria bassiana Strains for Biological Control of Cosmopolites sordidus (Germ.) (Coleoptera: Curculionidae) in Plantain

1Embrapa Cassava & Fruits, C.P. 7, 44380-000 Cruz das Almas, BA, Brazil
2Federal Institute of Education, Science and Technology of Bahia–Campus Catu, R. Barão de Camaçari 118, 48100-000 Catu, BA, Brazil
3ESALQ/USP, C.P. 9, 13418-900 Piracicaba, SP, Brazil
4Embrapa Cassava & Fruits, UFRB, Rua Rui Barbosa 710, 44380-000 Cruz das Almas, BA, Brazil

Received 1 May 2013; Revised 25 July 2013; Accepted 13 August 2013

Academic Editor: Jacques Cabaret

Copyright © 2013 Marilene Fancelli et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The objective of this study was to select strains of Beauveria bassiana for controlling Cosmopolites sordidus (Germ.) in plantain farms (cv. Terra) of the “Recôncavo” and southern regions in the state of Bahia, Brazil. The virulence of 32 B. bassiana isolates against C. sordidus was determined under laboratory conditions. Three isolates (CNPMF 407, CNPMF 218, and CNPMF 416) were selected for evaluation under field conditions in plantations located in the counties of Mutuípe and Wenceslau Guimarães. Population of C. sordidus was estimated every 15 days by using pseudostem traps. The efficiency of the three strains of B. bassiana was compared to chemical control (carbofuran, 4g/trap) and absence of control. Carbofuran caused around 90% of adult mortality after 12 months, with a reduction in the population of C. sordidus since the first evaluation. A low number of trapped insects was observed in the fungus-treated plots, suggesting the efficiency of the isolates in controlling the C. sordidus population. The strain CNPMF 218 was the most efficient in controlling C. sordidus adults in both locations, causing around 20% mortality, leading to 40% population size reduction after 12 months.