The monoculture of eucalyptus species shows great expansion in the state of Pará, Brazil, so the culture presents high propensity to be a host species of both native and exotic entomological fauna. Commercial plantations of eucalyptus were monitored in a monthly basis from January 2015 to December 2016 through yellow sticky traps that were replaced in each observation. These traps were installed in the municipalities of Paragominas, Ulianópolis, Dom Eliseu, and Rondon do Pará, southeastern Pará, Brazil. The species Glycaspis brimblecombei (Moore, 1964) and Blastopsylla occidentalis (Taylor, 1985) were observed in all municipalities sampled, which becomes the first record of these species in the Brazilian Amazonian state of Pará. Therefore, these species have now their geographical distribution expanded in the Brazilian Amazon.
Thaumastocoris peregrinus (Hemiptera, Thaumastocoridae) is a phytophagous pest of eucalyptus plantations. It was introduced in Brazil in 2008, and expanded rapidly due to its adaptive capacity to different climatic conditions. Eucalyptus has been planted in the Brazilian Amazon since the 1980s, being used in silvopastoral systems and for cellulose production. Since its introduction in the southernmost Brazilian state of Rio Grande do Sul, T. peregrinus has expanded its geographical distribution to 117 municipalities in states in the south (Rio Grande do Sul, Santa Catarina and Paraná), southeast (São Paulo, Espirito Santo, Rio de Janeiro and Minas Gerais), mid-west (Mato Grosso do Sul and Goiás) and northeast (Sergipe) of the country. Here we report the first record of T. peregrinus in the Brazilian Amazonian state of Pará.
Plantios florestais homogêneos são comumente atacados por agentes bióticos devido à menor diversidade biológica. Este tipo de plantio, especialmente de eucalipto, se intensificou no sudeste do estado do Pará, Brasil, a partir dos anos 1990. Desta forma, o objetivo deste estudo foi prospectar a diversidade da entomofauna aérea, avaliar suas respostas à sazonalidade e detectar a ocorrência de possíveis insetos praga importantes para monocultivos de Eucalyptus spp. Foram utilizadas armadilhas amarelas adesivas para a amostragem em plantios de E. urophylla e do híbrido E. grandis x E. urophylla. No total, foram realizadas 12 coletas, com 27 armadilhas cada, divididas em estação seca e chuvosa, durante dois anos em três municípios do Sudeste do Pará. Foram calculados os índices de diversidade de Shannon-Wiener e Pielou. As famílias foram classificadas quanto à diversidade faunística, através dos índices de dominância, frequência, abundância e constância. O teste de análise Fatorial 2 x 2 foi realizado para comparar o efeito da sazonalidade entre os eucaliptos. Foram coletados 10.280 indivíduos, distribuídos em oito ordens e 68 famílias. As ordens mais abundantes foram Hemiptera, Coleoptera e Diptera, onde Hemiptera foi a mais abundante na estação seca, e Diptera na estação chuvosa. As famílias Aphalaridae e Thaumastocoridae foram as mais importantes. Também foi registrada a ocorrência das espécies praga Blastopsylla occidentalis, Glycaspis brimblecombei e Thaumastocoris peregrinus.
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