Influence Of Cutting Intensities On Species Diversity Of Longhorn Beetles (Coleoptera: Cerambycidae) In Broad-leaved Korean Pine Forests

The flight intercept traps baited with generic pheromones of Cerambycinae and ethanol lures were set up in broad-leaved Korean pine forest of Jiaohe Forestry experimental Region Administration of Jilin Province in 2013, 2014 and 2015 to discuss the influence on species diversity of longhorn beetles(Coleoptera:Cerambycidae) with different cutting intensity levels. The results showed that:1) This survey recorded 7 subfamilies, 32 genera, 44 species of Cerambycidae.2) With the increase of recovery time after cutting, the cutting samples in the number of Cerambycidae showed an increasing trend. The guild composition of Cerambycidae in the taxa of the families, genera and species appeared more obvious change in the plots along the cutting intensities gradient in 2013, 2014 and 2015.Relatived to the subfamily the response of genera and species on cutting intensities were more obvious.3) Lamiinae, Lepturinae and Cerambycinae had the most species and individual number in broad-leaved Korean pine forest. The species composition of Cerambycinae, Lamiinae and Lepturinae was sensitive to the cutting intensities. The number of species increased and the species turnovered distinctly with the increase of cutting intensity, the number of newly added species showed decreasing trend and the number of lost species was basically unchanged. With a view to the number of trapped species, the trapping efficiency had a little difference among lures, but the composition of trapped species was significantly different, and the lures were highly complementary. Part of the longhorn beetles showed prominent selectivity to lures.Plagionotus pulche and Anaglyptus colobotheoides were the dominant species in experimental stands.4) The both species and individual number of Cerambycidae showed distinctly seasonal dynamics. Number of species and individuals reached the peaks in the June and July, then fell sharply. On each sampling time, the number of species and individuals showed increased trend with the increase of cutting intensities. Most of the longhorn beetles adults had a long flying period, and a few of them had a short one.5) The trapping activity on Eutetrapha metallescens, Gaurotes ussuriensis,Macroleptura thoracica, Prionus insularis, Rhopalopus speciosus, Plagionotus pulcher, Xylotrechus cuneipennis, Anaglyptus colobotheoides was significantly different among lure and their combinations. The traps baited with different lure and their combinations caught different species of longhorn beetles, and average species and individual number had a significant difference among lure and their combinations.Compared with control, the traps baited with K6 and K8 caught more longhorn beetles, especially caught more Lamilnae, Lepturinae and Cerambycinae. The ethanol lures with high release rate and some host tree volatile lures were also attractive to bark beetles and other bored beetles. Using generic pheromones of Cerombycinae and specific host volatile lures can increase the monitoring efficiency of some longhorn beetle species, and contribute to controlling their damage.