Use of etanol in the collector recipiente of ethanolic traps as attractive bait for Scolytinae (Coleoptera:Curculionidae) in eucalyptus stands in region of Cerrado

Abstract

Trap models for Scolytinae generally use attractive bait-holders and a collector with ethanol to store the insects. The aim of this paper was verify if the ethanol in the container insect collector can be used as an attractive substance, without need of an extra compartment. The study was carried out in Cuiabá, state of Mato Grosso, Brazil, between June 2009 and May 2010 in stands of Eucalyptus camaldulensis, Eucalyptus urophylla x Eucalyptus camaldulensis, Eucalyptus urophylla x Eucalyptus grandis and native cerrado. Eight escolitídeo-curitiba model traps were installed in each environment, four with 96% ethanol bait holders and the others without attractive. In all traps 70% ethanol was used in the insect collecting container. In the bait traps 2,246 insects and 2100 insects were collected in the no bait, totaling 4,436 insects distributed in 13 genus and 24 species. The use of traps with ethanol baits had no significant effect on insect collection during the evaluated period and regardless of the environments.