Diagnóstico da ocorrência de cupins xilófagos em árvores urbanas do bairro de Higienópolis, na cidade de São Paulo. / Diagnosis of the occurrence of xylophagous termites in urban trees of a neighborhood of São Paulo city, Brazil.

AUTOR(ES)

Raquel Dias de Aguiar Moraes Amaral

DATA DE PUBLICAÇÃO

2002

RESUMO

The problem of xylophagous termites in the edifications and historical buildings of the city of São Paulo, Brazil, is not confined to these structures, but also to the trees which, besides being attacked can shelter these insects of subterranean habit. The dispersion capacity of these termites can jeopardize the biological sanity of other trees and also of buildings. As in Brazil there is a lack of criteria to correctly detect and verify termite infestation in trees, this work aims at determining the existence of a correlation between external indicators and the internal presence of xylophagous termites in urban trees, in addition to estimating the intensity of the termite infestation by means of non-destructive evaluation. Forty-nine trees were examined for external signs of the presence of termites, tunnels or vestiges in the bark or inner bark of the trees, in the soil around the base of the trees, the general conditions and the site where the trees were planted. In addition to the external analysis, an internal search in the trunk was carried out through a non-destructive method to estimate the intensity of the possible attack by termites.Of the trees inspected, 28,60% presented live termites or signs that indicated their presence, and the species found was Coptotermes havilandi Holmgren. An existing correlation between one indicator of the external analysis and the internal analysis was detected in 50% of the cases. When the indicator at external analysis of the trunk with the intensity degrees "attack" and "intense attack" was detected, the "intense decline" loss on wood strength meant that interns of internal biological sanity, the tree had been affected by termite action.

ASSUNTO(S)

arborization of street arborização de rua harmful insect inseto nocivo cupim xilófago trees. diagnosis árvores – diagnóstico

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