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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.

Resumo. Coleoptera e a ordem mais numerosa e diversificada de Insecta. Possuem diversos tipos de alimentacao, sendo que os besouros herbivoros atacam cultivos agricolas e plantas ornamentais causando prejuizos aos agricultores. Conhecer as especies que afetam o cultivo local e uma forma de diminuir seu impacto e propor formas de manejo corretas. Os objetivos deste trabalho foram identificar os coleopteros coletados em armadilhas contendo o oleo de citronela ou seus componentes (citronelal, citronelol e geraniol) instaladas em Ponta Grossa, Parana e, caracterizar a coleopterofauna atraves de diferentes analises ecologicas. Somente os coleopteros foram identificados e contabilizados. O programa ANAFAU analisou: indices de frequencia, abundância, dominância e constância. Pelo PAST avaliou-se a diversidade, equitatividade e similaridade da comunidade atraida pelas armadilhas. Foram coletados 1269 coleopteros, distribuidos em 23 familias. Diabrotica speciosa (Germar)foi a unica especie superdominante, superabundante, superfrequente e constante ao longo de toda a amostragem, correspondendo a 54,68% das coletas. Citronela 1% (25,22%), citronelol 1% (25,06%) representaram 50,28% das capturas. Citronela 1% teve a maior diversidade e riqueza de especies e citronelol 0,5% a menor. O citronelal 1% e o citronelol 1% apresentaram maior similaridade entre as especies capturadas nestas duas armadilhas. E possivel inferir que a distribuicao dos coleopteros capturados nos compostos ocorreu devido a presenca de moleculas do atrativo tambem estarem presentes em seus feromonios. O elevado numero de D. speciosa coletadas confirma o potencial atrativo dos compostos testados que podem vir a auxiliar na reducao de pragas agricolas, diminuindo o uso de agrotoxicos. Coleopterofauna (Insecta: Coleoptera) collected in traps with essential oil of citronella or its components in the city of Ponta Grossa, Parana, Brazil Abstract. Coleoptera is the most numerous and diverse order of Insecta. They have various feeding behaviors, being that herbivorous beetles attack agricultural crops and ornamental plants, causing losses to farmers. Knowing the species that affect the local culture is a way to reduce its impact and to propose correct ways of handling them. The objectives of this research were to identify Coleoptera collected in traps containing citronella oil or its components (citronellal, citronellol and geraniol) installed in Ponta Grossa, Parana, and to characterize the coleopterofauna through different ecological analysis. Only beetles were identified and counted. The ANAFAU program analyzed: indices of frequency, abundance, dominance and constancy. For PAST, the diversity, equity and similarity of the community attracted by the traps was evaluated. A total of 1269 beetles were collected, distributed in 23 families. Diabrotica speciosa (Germar) was the only superdominant, superabundant, superfrequent and constant species throughout the whole sampling, corresponding to 54.68% of the captures. Citronella 1% (25.22%) and citronellol 1% (25.06%) represented 50.28% of the catches. Citronella 1% had the highest diversity and species richness and citronellol 0.5% the lowest. Citronellal 1% and citronellol 1% showed greater similarity between the species captured in these two traps. It is possible that the distribution of the Coleoptera captured in the compounds occurred due to the presence of attractive molecules also being present in their pheromones. The high number of D. speciosa collected confirms the attractive potential of the tested compounds that may help to reduce agricultural pests, reducing the use of agrochemicals.