Seasonal occurrence of bark and woodboring Coleoptera in stands of Pinus densiflora (Pinales: Pinaceae) and Larix kaempferi (Pinales: Pinaceae) and monitoring method using multifunnel traps baited with pine volatiles.

ABSTRACT

This study investigated the seasonal occurrence of bark and woodboring Coleoptera in Pinus densiflora (Pinales Pinaceae), and Larix kaempferi (Pinales Pinaceae) stands using multifunnel traps baited with pine volatiles in Korea. The number and species of bark and woodboring beetles caught in traps baited with ethanol, α-pinene, and ethanol+α-pinene were compared to determine the effective attractants. In addition, the effects of other pine volatiles, such as (-)-ß-pinene, ß-caryophyllene, (±)-limonene, ß-myrcene, and 3-carene, were investigated. A total of 13,134 woodboring beetles from 150 species were collected from pine and larch stands from 2019 to 2020. Tomicus minor (Hartig) (Coleoptera Curculionidae) adults were more attracted to traps baited with α-pinene, whereas Xyleborinus saxesenii (Ratzeburg) (Coleoptera Curculionidae), Cyclorhipidion pelliculosum (Eichhoff) (Coleoptera Curculionidae), and Phloeosinus pulchellus (Blandford) (Coleoptera Curculionidae) adults were more attracted to traps baited with ethanol. Hylurgops interstitialis (Chapuis) (Coleoptera Curculionidae), Shirahoshizo genus group, Rhagium inquisitor (Linne) (Coleoptera Cerambycidae), and Rhadinomerus maebarai (Voss & Chûjô) (Coleoptera Curculionidae) were more frequently attracted to traps baited with ethanol+α-pinene than to traps baited with other attractants. The addition of 3-carene to ethanol+α-pinene enhanced the capture of H. interstitialis, R. inquisitor, and Hylobius (Callirus) haroldi (Faust) (Coleoptera Curculionidae).