Ocorrência e Distribuição de Coccinelídeos (Coleoptera, Coccinellidae) Associados às Plantas Cítricas no Estado do Rio de Janeiro

Abstract

Resumo. O estudo objetivou registrar a ocorrência, fl utuação populacional das espécies de coccinelídeos e delinear a distribuição geográfi ca (Coleoptera, Coccinellidae) associados as plantas cítricas no Estado do Rio de Janeiro. Abstract. This work aimed to register the occurrence, study the population fl uctuation the ladybeetles species and to delineate the geographic distribution (Coleoptera, Coccinellidae) associated at citrus plants in Rio de Janeiro State. 11 districts situated in two regions of the Rio de Janeiro State were visited: "Baixada Fluminense" and "Região das Baixadas Litorâneas (Região Citrícola)". The study period was January 2000 to June 2001. The coccinellids was observed, collected, conserved, and identifi ed. This way 11 species they were observed on State. The districts to larger species occurrence were Seropédica, and Araruama and to species lower was São Pedro da Aldeia, Iguaba Grande, Tanguá, Itaboraí, Natividade e Porciúncula. The species that it was verifi ed in larger distribution were Pentilia egena (Mulsant, 1850), present in 10 districts, and with smaller distribution it was Curinus coeruleus Mulsant 1850, present in just only one district. When evaluated population fl uctuation, there was a tendency in the reduction of the population in coldest (winter) moths, being P. egena the specie with average larger populational (40%) and dominant specie together with Azya luteipes Mulsant 1850. In study period the species diversity was high (α= 3.91) when evaluated through Margalef and Shanon-Wiener index's (H'=0.81), being considered a relatively high diversity.

Levantamento populacional de inimigos naturais na cultura da manga (Mangifera indica L.)

“…Assim, ficou caracterizada a dominância deste artrópode no referido pomar; a espécie também foi classificada como muito abundante, muito frequente e constante porém, apresenta, normalmente, baixa ocorrência para muitos agroecossistemas (Cividanes, 2002;Guerreiro, 2005;Duarte et al, 2012;Harterreiten-Souza et al, 2012), divergindo dos resultados encontrados. A resposta observada no presente experimento pode estar intimamente relacionada com a presença de espécies de presas preferenciais por este predador (diaspidídeos) (Rodrigues et al, 2008b).…”

Population Fluctuation of Selenaspidus articulatus Morgan (Hemiptera: Diaspididae) in Rubber Tree

“…The different insect population densities throughout the year are directly related to the climatic conditions, the characteristics of the studied region, and possibly due to the presence of natural enemies that can act in naturally controlling this species. Coccinellids, such as Pentilia egena Mulsant, Coccidophilus citricola Brèthes, Azya luteipes Mulsant, Cycloneda sanguinea L. and Scymnus spp., are important natural enemies of S. articulatus in citrus (Rodrigues et al, 2008).…”

Distribution and Habitat Preference of Carabidae and Staphylinidae (Coleoptera) in an Orange Orchard and a Forest Fragment

“…Studies dealing with the occurrence of arthropod predators in citrus orchards are rare in Brazil. The information available is related to coccinellids, lacewings, and syrphids (Rodrigues et al 2004), ants (Carvalho et al 2000), wasps (Galvan et al 2002), and mites (Silva & Oliveira 2006). Some studies have reported on the occurrence of parasitoids in orchards (Garcia et al 2001;Jahnke et al 2005).…”