Avaliação da diversidade genética, prospecção de cairomônios e formulações de sordidina como alternativas ao controle do Cosmopolites sordidus (Germar, 1824) (Coleoptera: Curculionidae)

Abstract

The banana has become of great importance in the world, being directly linked to social and economic relevance, generating income for both family and corporate agriculture. The C. sordidus is a key pest of banana, reducing yields by up to 90%. Therefore, the aim of this study was to evaluate the genetic diversity of C. sordidus, prospect molecules kairomones and test the location of traps and synthetic pheromone formulations for integrated field management. This work was carried out through institutional partnership between the Federal University of Alagoas LPqRN, Chemistry LTDA Interacta and Farm-Cooperative Bonsucesso Pindorama.In the first study genetic variability was detected intra and inter-population for this insect among three studied populations originated from regions of banana producers in the state of Alagoas. This result indicates the feasibility studies for exploring the possible variability in proteomic and metabolomic diversity in populations, especially related to communication insect/insect and insect/plant chemical systems. In the second study, was detected variation in the chemical profile of the volatile atmosphere, the rhizome and pseudostem. Metabolites with functionality in insect/plant interaction and potential application as kairomones for management of C. sordidus were observed. Among these α-pinene, β-pinene,α-copaene, eukaliptol and limonene. In the third stage, the experiment evaluated trap locations in the field installing these on the edge of the field, and internal traps are recommended in order to enhance the control and monitoring of the arthropod population. In the final study, which evaluated the formulation of pheromone was observed greater efficiency in relation to the amount of sordidina versus capture C.sordidus with 78.06 mg of this semiochemical. However, this efficiency was promoted when associated with mineral oil adjuvant dose 100.8 μL and isoamyl acetate kairomone in the amount of 700 ul per trap.