Antixenosis of bean genotypes to Chrysodeixis includens (Lepidoptera: Noctuidae)

Pesquisa Agropecuária Brasileira

Rafaela Morando¹  Edson Luiz Lopes Baldin¹  Patrícia Leite Cruz¹  André Luiz Lourenção¹  Alisson Fernando Chiorato¹ 

关键词: common bean;    host plant resistance;    nonpreference;    resistance mechanisms;    soybean looper.;    feijão-comum;    resistência de plantas hospedeiras;    não preferência;    mecanismos de resistência;    lagarta-falsa-medideira.;   

DOI  :  10.1590/S0100-204X2015000600003

来源: SciELO

【 摘 要 】

The objective of this work was to evaluate bean genotypes for resistance to soybean looper (Chrysodeixis includens). Initially, free-choice tests were carried out with 59 genotypes, divided into three groups according to leaf color intensity (dark green, light green, and medium green), in order to evaluate oviposition preference. Subsequently, 12 genotypes with high potential for resistance were selected, as well as two susceptible commercial standards. With these genotypes, new tests were performed for oviposition in a greenhouse, besides tests for attractiveness and consumption under laboratory conditions (26±2ºC, 65±10% RH, and 14 h light: 10 h dark photophase). In the no-choice test with adults, in the greenhouse, the 'IAC Jabola', Arcelina 1, 'IAC Boreal', 'Flor de Mayo', and 'IAC Formoso' genotypes were the least oviposited, showing antixenosis-type resistance for oviposition. In the free-choice test with larvae, Arcelina 4, 'BRS Horizonte', 'Pérola', H96A102-1-1-1-52, 'IAC Boreal', 'IAC Harmonia', and 'IAC Formoso' were the less consumed genotypes, which indicates antixenosis to feeding. In the no-choice test, all genotypes (except for 'IAPAR 57') expressed moderate levels of antixenosis to feeding against C. includens larvae.

【 授权许可】

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