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Resumo. Este estudo teve como objetivo obter uma formulacao atrativa a base de oleo de citronela e seus componentes volateis para captura de Diabrotica speciosa (Germar). Tres experimentos sequenciais foram realizados em culturas de abobrinha ou pepino. Os insetos foram coletados por armadilhas de garrafa PET com tres aberturas laterais, contendo um volume de 200 ml de cada formulacao, suspensas a 10 cm do nivel do solo numa area experimental de 30 m2. No primeiro experimento foram testados oleo de citronela em 1, 2 e 4%. No segundo investigou-se tambem a acao de citronelal, citronelol e geraniol a 1%. E, o citronelol a 0,5, 1 e 2% foi testado no terceiro experimento. Como resultado observou-se que a formulacao contendo citronelol a 0,5% foi estatisticamente superior as demais. Outros insetos foram capturados pelas armadilhas como coleopteros Diabrotica viridula (Fabricius)e Astylus variegatus (Germar), e tambem exemplares de Diptera, Hemiptera e Hymenoptera. Considerando a alta demanda por alimentos orgânicos e da preocupacao com o ambiente e a saude, a emulsao a base de citronelol em 0,5% cumpre adequadamente o seu objetivo, garantindo uma boa capacidade atrativa para D. speciosa . Esta formulacao pode ser usada paralelamente com outros metodos alternativos para reduzir a presenca desse inseto nas culturas. Citronella (Poaceae) essential oil and its components for the control of brasileirinho (Coleoptera: Chrysomelidae) in vegetable crops Abstract. The present study aimed to get an attractive formulation of oil-based citronella and its volatile components to capture Diabrotica speciosa (Germar). Three sequential experiments were performed in zucchini or cucumber crops. The insects were collected in PET bottle traps with three lateral apertures, containing a volume of 200 ml of each formulation, suspended 10 cm above the ground level in an experimental area of 30 m2. In the first experiment citronella essential oil was tested at 1, 2 and 4%. In the second experiment the action of citronellal, citronellol and geraniol at 1% were investigated. Furthermore, citronellol at 0.5, 1 and 2% has been tested in the third experiment. As a result it was observed that the formulation containing 0.5% citronellol was statistically higher than the other tested formulations. Other insects were captured by the traps as the beetles of Diabrotica viridula (Fabricius)and Astylus variegates (Germar), and also copies of Diptera, Hemiptera and Hymenoptera. Considering the high demand for organic food, and concern for the environment and health, the citronellol emulsion at 0.5% adequately fulfilled its goal, ensuring a good attractive capacity for D. speciosa . This formulation can be used simultaneously with other alternative methods to reduce the presence of such insects in crops.

Óleo essencial de citronela (Poaceae) e seus componentes para controle do brasileirinho (Coleoptera: Chrysomelidae) em olerícolas