Data/hora: 12/06/2024 00:26:59

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 24/01/2020
Data da última atualização: | 20/04/2020
Autoria: | NASCIMENTO, P. T.; VON PINHO, R. G.; FADINI, M. A. M.; SOUZA, C. S. F.; VALICENTE, F. H.
Afiliação: | Universidade Federal de Lavras; Universidade Federal de Lavras; Universidade Federal de São João del-Rei; Universidade Federal de Lavras; FERNANDO HERCOS VALICENTE, CNPMS.
Título: | Does singular and stacked corn affect choice behavior for oviposition and feed in Spodoptera frugiperda (Lepidoptera: noctuidae)?
Ano de publicação: | 2020
Fonte/Imprenta: | Neotropical Entomology, v. 49, p. 302-310, 2020.
DOI: | 10.1007/s13744-019-00750-0
Idioma: | Inglês
Conteúdo: | Little is known about the effects of genetically modified corn plants on the foraging of Spodoptera frugiperda (J.E. Smith). Therefore, this study examines whether singular herbicide-tolerant and insect-resistant plants and their stacked events interfere with food reference and oviposition of S. frugiperda. Two non-Bt corn hybrids and three Bt-hybrids, some of them with glyphosate tolerance (GT), were evaluated. Food preference of larvae and biological parameters were assessed. Oviposition preference bioassays involved choice and no choice condition in plants uninfested and previously infested by larvae in a greenhouse and in the field. The results indicate that there is no relationship between preference of larvae and adult moths. Adult females selected preferentially transgenic hybrids, while larvae selected non-Bt hybrid. Fall armyworm larvae avoid Bttoxin-expressing leaf tissues, survived only on the non-Bt leaf tissues, and showed minor differences in other life-history traits reared on GT and non-transgenic corn leaf tissues. Female moths showed preference for transgenic plants to lay eggs, but with variable output between previously infested and uninfested plants with larvae. The fact that moths preferred Ag 3700RR2 and non-Bt hybrids for oviposition supports the refuge?s strategy aiming at producing susceptible individuals. The use of this hybrid must be integrated with a program of control. The results showed also the importance of correct hybrid selection as part of insect resistance management to Bt-plants. The implications of these findings for understanding the impacts of plant-mediated cues on pest behavior in transgenic crop systems are discussed.
Palavras-Chave: | Desempenho reprodutivo; Interação inseto-planta; Verme.
Thesagro: | Planta Transgênica; Praga de Planta.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/212315/1/Does-singular.pdf
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (29127-1) - UPC - AP - DD -  -  -  - DIS