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Chilean Journal of Agricultural Research
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0718-5820
EISSN: 0718-5839
Vol. 72, No. 4, 2012, pp. 516-522
Bioline Code: cj12078
Full paper language: English
Document type: Research Article
Document available free of charge

Chilean Journal of Agricultural Research, Vol. 72, No. 4, 2012, pp. 516-522

 en ASSESSING Bemisia tabaci check for this species in other resources (GENN.) BIOTYPE B RESISTANCE IN SOYBEAN GENOTYPES: ANTIXENOSIS AND ANTIBIOSIS
da Silva, José Paulo Gonçalves Franco; Baldin, Edson Luiz Lopes; de Souza, Efrain Santana & Lourenção, André Luiz

Abstract

Since it was first reported in Brazil in the 1990s, the B biotype of silverleaf whitefly ( Bemisia tabaci check for this species in other resources [Genn.], Hemiptera: Aleyrodidae) has been recognized as an important pest in soybeans ( Glycine max check for this species in other resources L.), reducing the productivity of this legume species in some areas of the country. As an alternative to chemical control, the use of resistant genotypes represents an important tool for integrated pest management (IPM). This study evaluated the performance of 10 soybean genotypes prior to whitefly infestation, by testing attractiveness and preference for oviposition in the greenhouse and antibiosis in the laboratory. In a multiple-choice test, 'IAC-17' was the least attractive to insects. In a no-choice test, 'IAC-17' was the least attractive for egg deposition, indicating the occurrence of non-preference for oviposition on this genotype. Trichome density was positively correlated with the oviposition site and may be associated with the resistance of 'IAC-17' to infestation. The genotypes 'IAC-PL1', 'IAC-19', 'Conquista', 'IAC-24' and 'IAC-17' extended the insect's life cycle, indicating the occurrence of a small degree of antibiosis and/or non-preference for feeding.

Keywords
Glycine max, silverleaf whitefly, host plant resistance, attractiveness, non-preference, trichome

 
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