Título:	Fitness cost of resistance to bacillus thuringiensisin velvetbean caterpillar anticarsia gemmatalishübner (lepidoptera, noctuidae).
Autor:	SOSA-GÓMEZ, D. R. MIRANDA, J. E.
Afiliación:	DANIEL RICARDO SOSA GOMEZ, CNPSO; JOSE EDNILSON MIRANDA, CNPA.
Año:	2012
Referencia:	Revista Brasileira de Entomologia, v. 56, n. 3, p. 359-362, Set. 2012.
Descripción:	Selection pressure to obtain resistant genotypes can result in fitness cost. In this study, we report the effects of the selection pressure of a commercial formulation of Bacillus thuringiensis on biological aspects of a Dipel-resistant strain of velvetbean caterpillar, Anticarsia gemmatalis Hübner. Comparisons of Dipel-resistant and susceptible individuals revealed significant differences in pupal weight and larval development time. Both strains (Dipel-resistant and susceptible) were susceptible to Cry1Ac toxin expressed in foliar cotton tissues. Resistant and susceptible strains showed low survival rates of 22.5% and 51.2%, respectively, when fed with Greene diet containing Bt-cotton. Larvae bioassayed after three laboratory generations presented lower survival and less instar numbers than individuals maintained in the laboratory for more than 144 generations. Pupal weight was 9.4% lower and larval development time was 1.9 days longer in the resistant population than in the susceptible strain. Other parameters, such as duration of pupal stage, adult longevity, number of eggs per female, oviposition period, and egg fertility, remained unaffected. Keywords: Anticarsia gemmatalis; toxin; Cry1Ac; Dipel-resistant; strain.
Thesagro:	Soja Raça Toxina Anticarsia Gemmatalis
NAL Thesaurus:	Toxins Soybeans Anticarsia
Palabras clave:	Cry1 Ac Dipel
Citación:	0085-5626
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPSO)