Influence of photoperiod in the attack of Dinoderus minutus Fabricius (Coleoptera: Bostrichidae) in rotary cut veneers of tropical species

Abstract

This research had as objective to evaluate the influence of photoperiod to the attack of borers Dinoderus minutus (Coleoptera: Bostrichidae) in wood rotary cut veneers of six tropical species: axixá (Sterculia sp.), amescla (Trattinickia burseraefolia (Mart.) Wild), bandarra (Cedrelinga catenaeformis Ducke), copaíba (Copaifera sp.), sumaúma (Ceiba pentandra) and tauari (Couratari sp.) used in the manufacture of plywood panels. Two experiments were carried out, in conditions of laboratory, testing the species of isolated form and grouped form, induced to the attack of this insect, simulating its storage. The period of assay was of 20 weeks, in adaptation to European norm DIN EN 20-1 (1992), observing the index of mortality and the quantification of the perforations. The species sumaúma was the only one attacked and infested by the insect. Amongst the other tested species, tauari detached by the biggest insect mortality between veneers (samples) showing its resistance to D. minutus.