Occurrence and bionomy of Barbitistes constrictus (Orthoptera: Tettigoniidae) in the eastern part of the Czech Republic
Holusa, J.(Vyzkumny Ustav Lesniho Hospodarstvi a Myslivosti, Frydek-Mistek (Czech Republic)) E-mail:[email protected] | Heralt, P. | Drapela, K.(Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Lesnicka a Drevarska Fakulta)
The bionomy of Barbitistes constrictus was studied using emergence traps, sticky bands, sweeping and counting of females in 2 localities, and Malaise traps in 27 localities in spruce forests in the eastern part of the Czech Republic from 1998 to 2004. It is a common species there but with a low population density. It has five instars (based on the length of femur and tibia), the larval development lasts 10-12 weeks. Nymphs climb up to crowns after hatching. Adulthood extends from July to October. Abundance of eggs in the ground is very low. The most effective and exact monitoring method seems to be the method of sticky bands. It is also easy to catch nymphs on forest edges with low branchiness and southern or south-eastern exposition. To catch adults, the transect method and observation of trees are the most suitable, whereas emergence and Malaise traps are generally less effective. It is also possible to use cut trees during thinning and principal felling.
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