Infoquímicos no controle de Rhynchophorus palmarum (L., 1758) e Metamasius hemipterus L., 1758 (COL.: CORCULIONIDAE): formulação de feromônio; monitoramento; manejo do subproduto da casca do coco

Abstract

The coconut crop is damaged by several diseases that vary in importance from region to region. The main diseases include red ring, caused by the nematode Bursaphelenchus cocophilus (Cobb) Baujard. Rhynchophorus palmarum (L.,1758) (Col.: Curculionidae) can cause direct damage because its larvae open galleries in palm tree tip merystem. Metamasius hemipterus Linnaeus, 1758 (Col.: Curculionidae), commonly called `striped borer´ is found associated to various hosts agricultural and ornamental importance. Monitoring is the main component of Integrated Pest Management and is essential for rationalizing insect control, following the variation in the number of individuals over time and defining critical areas, which is relevant information to administer control measures. The insects perform their ecological relationships with the environment and other organisms in several ways and one of the most important is communication through chemical compounds. Phermones are substances secreted by an individual that cause a reaction in the receptor individual of the same species, causing a specific reaction. Aeration is the most common technique for collecting volatile plant compounds. Through this process, the compounds emitted are collected. Semiochemicals are identified using the chromatography technique, for example, gas chromatography, gas chromatography coupled to spectrometry (CG-MS) and gás chromatography coupled to electroantennography. Chitosan can be applied in biotechnology and in manufacturing microspheres for controlled release. This residue can be raw material in the manufacture of various industrial products and craft creating jobs and income, or even used as agricultural input and up to biomass, generating energy. This work had as objective: to evaluate the use of different releasers attractant of aggregation for pest control of coconut; studying the population fluctuation of R. palmarum and M. hemipterus in planting of coconut and analyze the effects of the management of by-product of the coconut shell in the attractiveness of R. palmarum.