Não preferência para alimentação e antibiose em genótipos de feijão-caupi a Chrysodeixis includens (Walker, 1857) (Lepidoptera: Noctuidae)

• Ano de defesa: 2015
• Autor(a) principal: Diniz, Juno Ferreira Silva [UNESP]
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Feijão; Pragas agricolas; Lagarta; Plantas - Resistência aos insetos; Aspectos biologicos; Plants Insect resistance
• Link de acesso: http://hdl.handle.net/11449/126403; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/11-08-2015/000842911.pdf

The objective of this study was to evaluate the resistance of categories by non preference for feeding and antibiosis in five cowpea genotypes (BRS Tumucumaque, BRS Cauame, BRS Guariba, BR17 Gurgueia and BR3 Tracuateua) to Chrysodeixis includens (Walker, 1857). The experiments were conducted in the Departamento de Fitossanidade da Faculdade de Ciências Agrárias e Veterinárias, Campus Jaboticabal / SP, and tests conducted in the Laboratório de Resistência de Plantas a Insetos, under controlled environmental conditions (temperature: 25 ± 1 ° C, 70 ± 10 % RH and 14 hours photophase). In non preference for feeding assays were performed tests free-choice and no-choice for the evaluation of attractiveness, writing down the average number of larvae attracted to the leaf disks 1, 3, 5, 10, 15, 30, 60, 120, 360 and 720 minutes after its release and dry matter consumed, using 20 replications. In the evaluation of the biological aspects of C. includens were evaluted following biological parameters: larval period - duration, viability and weight of larvae at 10 days of age; pre-pupae duration of the period; pupal period - duration, viability, weight after 24 hours of age and sex ratio; adult period - longevity, adult weight and the total number of eggs per female; larva-adult period - duration and viability, using a randomized design with six replications. The genotypes BRS Guariba and BR3 Tracuateua were less attractive. In relation to biological parameters evaluated, the insects fed of the BR3 Tracuateua genotype presented the worst rates and can relate this genotype as the least suitable for the development of C. includens. On the other hand the genotype BR17 Gurgueia was the most attractive to the 3rd instar larvae of C. includens, and the best among the genotypes for the development of this species