Improvement of <i>Ips typographus</i> catches in pheromone trap barriers by altering of sex assigned pheromone blends

Abstract The present study was based on the idea of a pheromone trap barrier with alternating dispensers releasing different mixtures that affect males and females differently. We tested possibility increasing catch efficacy barriers by altering mixture low levels cis-Verbenol (cV, targeting males, BM), high cV (targeting females, BF) intermediate (SL). In addition, we were interested in lowering dispersion attracted bark beetles, especially which reduces risk attack trees surroundings. Significant highest absolute relative found combination BM–BF, 2.2-fold higher than control treated commercial IT Ecolure baits (Fytofarm, Slovakia). At same time, lowest dispersal surroundings BM–BF found, 2.5-fold lower barrier. performance proved field trial experiment where total season part caught 1.5-fold more beetles during dispensers. Furthermore, results confirm males) females) is complemented desired reduced around barrier,