No abstract

]. Available from: guiasdecampo.wordAvailable from: guiasdecampo.wordpress.com/2010/12/19/chave-para-as-principais-subfamilias-egeneros-de-formigas-hymenoptera-formicidae/.

Haemagogus leucocelaenus, which is considered a major vector of wild yellow fever, exhibits acrodendrophilic habits and mainly deposits its eggs in treeholes and bamboo internodes. The selection of nursery sites is essential in the life history and reproductive success of mosquitoes. The present work investigated the preferred oviposition height and period of Hg. leucocelaenus in an Atlantic forest area in Rio de Janeiro. Sampling was performed using oviposition traps that were placed on plant material at 0, 2, 4, 6, and 8 m above the ground, from August 2015 to July 2016. Eggs were more abundant during October and May, and the height of traps placement had no significant effect on the eggs number indicating that Hg. leucocelaenus explores different levels of forest habitats, a behavior that may favor the transmission of pathogens among arboreal animals including primates and humans. The findings of the present study are discussed from an ecological and epidemiological point of view.

RESUMO O objetivo deste estudo foi determinar as espécies de Tephritidae e Lonchaeidae (Diptera: Tephritoidea) de ocorrência em pomares de laranja doce (Citrus sinensisOsbeck

No abstract

Resumo. O pulgão Toxoptera citricida (Kyrkaldy) (Sternorrhyncha) é um potencial transmissor do vírus da tristeza cítrica sendo considerada uma praga importante para a cultura. Foi realizado monitoramento quinzenais no período entre outubro de 2002 a outrubro de 2003, com o objetivo de estudar a dinâmica populacional deste afídeo, incluindo predadores e a interação com formigas. Este levantamento foi realizado em cultivo orgânico de tangerina cv. Poncã, Fazendinha Agroecológica, Seropédica, RJ. A análise faunística dos formicídeos atendentes e dos predadores, foi através dos índices de diversidade . Ant-tending was considered medium to H' value (0.6585) and high to D value (0.9012). The equitability was considered medium too (e = 0.69). T. citricida populational dynamic is influenced to foliar shoot following predation and ant-tending. These two end factors are antagonist due to protection offer to ants at BCA.

No abstract

Resumo. Os aleirodídeos são atendidos por formicídeos, conferindo assim proteção e dispersão, o que dificulta o controle destes sugadores. A interação Formicidae-Sternorrhyncha ocorre, principalmente, devido à produção de uma substância açucarada denominada honeydew. O objetivo do trabalho foi realizar o levantamento, estudo da diversidade, frequência, constância e dominância das espécies de formigas atendente de aleirodídeos no período noturno e diurno. Interaction between and Whiteflies (Sternorrhyncha, Aleyrodidae) in Organic Cropping of the Tangerine cv. Ponkan (Citrus reticulata Blanco)Abstract. The whiteflies are tending by ants, which give protection and dispersion make the control of those suckers more difficult. The interaction ant-Sternorrhyncha occurs, mainly due to the production of a sugared material named honeydew. The aim of the study as realized sampling, diversity study, frequency, constancy and dominance of the ant's whiteflies tending species in night and day period. The sampling were conducted from October 2002 to October 2003. The species of whiteflies detected were Aleurothrixus floccosus Maskell, Aleurotrachelus cruzi Cassino, Singhiella citrifolii (Morgan) and Paraleyrodes bondari Peracchi. The study concluded that 12 species of ants were associated with A. floccossus, 4 species with A. cruzi and 3 species with P. bondari. Associations between ants and S. citrifolli where not observed. Among the species of ants associated with whiteflies, those ones associated with A. floccosus presented the major diversity (0.743) and the minor dominance (0.3194) and equitability J (0.6882). Brachymyrmex sp. was the most frequent species (31.94%) and also the most constant. P. bondari showed a diversity of 0.477, the dominance of 0.3333 and the equitability J 1. To A. cruzi, the diversity was of 0.422, dominance of 0.6098 e equitability J of 0.7013. This species of whiteflies show a dominance of the species Crematogaster sp. 1, with the frequency of 60.98% although it was secondary. The close relationship between A. floccosus and 12 ants demonstrates a preference for the excrements (honeydew) of the whiteflies, for the quantity as well as for the quality of the honeydew.Keywords: Ant-whiteflies interaction; Citriculture; Formicidae; Organic Cropping; Tending. _____________________________________A associação de formigas e aleirodídeos produtores honeydew (excreções açucaradas) são frequentes, devido à contínua coleta destes excrementos por parte dos formicídeos, o que beneficia os homópteros através da proteção. Entretanto, esta proteção não é absoluta, tendo em vista que os predadores e parasitóides desenvolvem estratégias sofisticadas para evitar a proteção das formigas (Way 1963). Desta forma o resultado do mutualismo, quando existente, proporciona benefícios recíprocos obtidos pela associação entre as espécies (addicott 1978).O número de espécies de formigas coletando honeydew em um pomar cítrico é relativamente considerável (123 espécies), ocasionado desta forma outbreaks de insetos prejudiciais a e...