Evaluation of attractants and traps for monitoring small banded pine weevil Pissodes castaneus

Abstract

This study aimed to develop a semiochemical‐baited trapping system to monitor the populations of small banded pine weevil, Pissodes castaneus, a serious pest in Pinus sylvestris young stands that are weakened by biotic and abiotic factors. The scope of the work included the development of a dispenser for compounds (ethanol and α‐pinene) emitted by P. sylvestris and the pheromones of P. castaneus: grandisol and grandisal. Additionally, the effectiveness of beetle catches in different types of traps (unitrap, cross‐unitrap and long and short pipe traps) baited with a dispenser was assessed. The olfactometric studies showed that most of the newly hatched beetles that had not fed were attracted by a mixture of grandisol and grandisal. However, in the group of feeding beetles, half were attracted by a mixture of ethanol and α‐pinene. These results indicated that both pheromones and α‐pinene plus ethanol should be useful for capturing P. castaneus beetles. In the field trials, the highest efficiency was found in baited unitraps that caught up to several hundred P. castaneus beetles, while the baited cross‐unitraps caught up to a few dozen beetles. No insects were found in either type of baited pipe trap or in any of the unbaited control traps. The baited unitraps and cross‐unitraps also collected, with varied intensity, Hylobius abietis beetles, a serious pest of reforestations. These results indicate the possibility of using a unitrap baited with a 4‐component attractant for monitoring P. castaneus in integrated pest management for the protection of young forests.

Pest survey card on Pissodes cibriani, P. fasciatus, P. nemorensis, P. nitidus, P. punctatus, P. strobi, P. terminalis, P. yunnanensis and P. zitacuarense

“…pitfall traps baited with fresh pine billets > ethanol-and turpentine-baited flight traps > ethanol-and turpentine-baited pitfall traps. Skrzecz et al (2019) found that pheromone-baited unitraps (Figure 9) were particularly efficient for trapping P. castaneus in Poland, catching several hundreds of beetles.…”

“…Although both P. nemorensis and P. strobi produce the two components, only P. nemorensis has been demonstrated to respond to them in the field, although both species display electrophysiological responses to the semiochemicals (Hibbard and Webster, 1993). Grandisol and grandisal have also been identified in the European species, P. castaneus (Marques et al, 2011), and a combination of both semiochemicals has proven very efficient at trapping this species in Poland (Skrzecz et al 2019), although commercial products are not yet available. Furthermore, pheromones have not been identified for all Pissodes species (https://www.pherobase.com/).…”

“…pitfall traps baited with fresh pine billets > ethanol-and turpentine-baited flight traps > ethanol-and turpentine-baited pitfall traps. Skrzecz et al (2019) found that pheromone-baited unitraps (Figure 9)…”

Increased capture efficiency of Scolytinae with modified semi-funnel trap model

“…Monitoring of Scolytinae with pheromone-baited traps (Galko et al, 2016) or ethanol (Oliveira et al, 2017;Skrzecz et al, 2019) determines population density to assist in the integrated management of these forest pests (Carvalho and Trevisan, 2015;Borkowski, 2017). The fermentation of extractives from newly cut wood forms this compound (Lemos et al, 2020;González-Peñas et al, 2020) indicating plants suitable for colonization by Scolytinae and, therefore, used in traps to attract these beetles (Klingeman et al, 2017).…”

Host selection behaviour of the banded pine weevil, Pissodes castaneus (Coleoptera: Curculionidae)

“…The banded pine weevil, Pissodes castaneus (Coleoptera: Curculionidae), was first detected in Patagonia Argentina in 2005. Along its Eurasian natural distribution it is usually associated with Pinus sylvestris , P. pinaster and other European pine species (Skrzecz et al, 2019). However, this weevil has been able to invade different geographic areas in Latin America and successfully colonize several American pine species.…”