Occurrence and bionomy of Barbitistes constrictus (Orthoptera: Tettigoniidae) in the eastern part of the Czech Republic
J. Holuša | P. Heralt | K. Drápela
The bionomy of Barbitistes constrictuswas studied using emergence traps, sticky bands, sweeping and counting of females in two localities and Malaise traps in 27 localities in spruce forests in the eastern part of the Czech Republic in 1998-2004. It is a common species there but with a low population density. It has five instars (based on the length of femur and tibia) and 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. Traps are generally less effective (emergence trap, Malaise trap). The use of cut trees during thinning and principal felling is possible.
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