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Temporal Variations of Lepidoptera Collected in an Eucalyptus Plantation in the State of Goiás, Brazilt†

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image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

Lepidopterans are considered an important group of Eucalyptus pests in Brazil due to severe losses in wood production arising from defoliation. Biweekly collections were made in the State of Goiás, Brazil as part of a study of the population dynamics and the effects of temperature and rainfall on Lepidoptera pests of Eucalyptus. Lepidoptera were collected with five light traps installed at two meters high with black light and powered by a 12 volt battery. These insects were divided into groups according to their importance as pests of Eucalyptus: group 1: 11 primary pests; group 2: 10 secondary pests; group 3: 64 species without defined importance to Eucalyptus; and group 4: non-identified species. Among the primary pests, Thyrinteina arnobia (Geometridae), Eupseudosoma aberrans (Arctiidae) and Sarsina violascens (Lymantriidae) were the most frequent, the last two being constant (> 50% of collections) and the first one accessory (25-50%). Idalus admirabilis (Arctiidae) and Eacles imperialis magnifica (Saturniidae) were the most frequent secondary pests, the first being constant and the second accessory. Most of the Lepidoptera species were collected during the coldest and driest months, which indicates that these conditions could favour the occurrence of Lepidoptera outbreaks in plantations of Eucalyptus in this region of Brazil. For this reason, population monitoring of these species should be intensified during these periods.

Affiliations: 1: Departamento de Biologia Animal/Bioagro, Universidade Federal de Viçosa, 36571-000 Viçosa, Minas Gerais, Brazil. br, Email: zanuncio@mail.ufv; 2: Departamento de Engenharia Florestal, Universidade Federal de Viçosa, 36571-000, Viçosa, Minas Gerais, Brazil; 3: Empresa Brasileira de Pesquisa Agropecudria - EMBRAPA, Rua Oswaldo Cruz 1143. Caixa Postal 174. 58107-720- Campina Grande, Paraíba, Brazil


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