Comparison of four trap types for ambrosia beetles (Coleoptera, Scolytidae) in Brazilian Eucalyptus stands

Eucalyptus spp. plantations represent >60% of the reforested area in Brazil . Although ambrosia beetle attacks on live trees were at first nonexistent, they have begun to appear with greater frequency. Monitoring for pest inse cts is a key factor in integrated pest management, and baited traps are one of the most widely used methods for insect population detection and survey . We compared the efficiency of the most widely used trap in Brazil to surv ey for ambrosia beetles and other Scolytidae, the ESALQ-84 type, with other traditionally employed traps: the multiple funnel (Lindgren trap); drainpi pe; and slot (Theyson) traps, in a Eucalyptus grandis Hill ex Maiden stand in Brazil. The ESALQ-84 trap was the most efficient in trapping Hypothenemu s eruditus Westwood and Hypothenemus obscurus (F.); the multiple funnel tra p caught significantly more Cryptocarenus diadematus Eggers; whereas the sl ot trap caught more Premnobius cavipennis Eichhoff and Xyleborus affinis Ei chhoff than the other traps. The drainpipe trap was the least effective tra p overall. When corrected for number of beetles caught per trap surface are a, catches were significantly higher on the ESALQ-84 trap for the majority of the species analyzed, probably because of a smaller trap surface area. T he slot trap was recommended for it caught overall more beetles of the thre e most economically important scolytid species in eucalypt plantations in B razil, P. cavipennis, X. affinis, and X, ferrugineus.