Data/hora: 01/06/2024 04:41:53

Provedor de dados: 	Acta Scientiarum: Agronomy	
País: 	Brazil	
Título: 	Morphological and chemical characteristics of onion plants (Allium cepa L.) associated with resistance to onion thrips	
Autores: 	Silva, Vitor Cezar Pacheco da; Bettoni, Marcelle Michelotti; Bona, Cleusa; Foerster, Luís Amilton.	
Data: 	2014-11-25	
Ano: 	2014	
Palavras-chave: 	5.01.02.02-8 Thrips tabaci; Thysanoptera; Thripidae; Onion; Plant resistance to insects Entomologia Agrícola.	
Resumo: 	Thrips tabaci Lindeman is the main pest of onion crops, and chemical control is the main method adopted by farmers. Alternative control methods should be prioritised to reduce the amount of insecticides used. Resistant cultivars are one efficient way to control thrips in the field. Our aim was to assess the influence of morphological and chemical characteristics of seven onion cultivars and their resistance to T. tabaci. The number of thrips and the morphological and chemical characteristics of the plants were assessed. Among the evaluated cultivars, Alfa São Francisco RT, BR 29 and Sirius showed resistance to T. tabaci, as indicated by the lower number of thrips observed during the cycle (64, 87, and 74 thrips, respectively). Morphological and chemical characteristics were associated with onion’s resistance to T. tabaci. For the cultivar Alfa São Francisco RT, a wider central angle (16.4°), a thinner cuticle, a larger amount of epicuticular waxes, and stomata on the surface of leaves accounted for resistance. For the cultivars BR 29 and Sirius, the resistance was likely due to the presence of resistance-conferring substances or high amounts of some component in the chemical composition of plants. 	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17436

10.4025/actasciagron.v37i1.17436	
Editor: 	Universidade Estadual de Maringá	
Relação: 	http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/17436/pdf_56	
Formato: 	application/pdf	
Fonte: 	Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 85-92

Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 85-92

1807-8621

1679-9275