Determination of the types of resistance of bean genotypes to the attack of Zabrotes subfasciatus (Boh.) (Coleoptera: Bruchidae)

Fábio Mazzonetto Arlindo L. Boiça Jr About the authors

With the purpose of looking for alternative means for the control of Zabrotes subfasciatus (Boheman) (Coleoptera: Bruchidae), that work had for objetive, to determine the resistance types involved in bean genotypes to its attack. It was realized no choice and free choice tests and the treatments were arranged in a completely randomized design with four and five replications, respectively, with samples of 10g of seeds. In no choice test was sampled the parameters total number of eggs, number of viable eggs, viability of eggs, dry wieght of the consumed food, biological cycle of egg to adult, number and percentage of emerged insects and weigth and longevity of females and males. For the free choice test, was evaluated the number of insects attract for the genotypes, total number of eggs and number of egg for female. With the obtained results, it can be concluded that the genotypes Preto 143 present resistance of the type nonpreference for oviposition in test free choice; and, the genotypes 2374, 2395, 2174, 133 and 155, present resistance of the type nonpreference for feeding and/or antibiosis.

Insecta; host plant resistance; stored bean

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