Nontarget lepidoptera species found in the pheromone traps for selected Tortricid species in 2002 and 2003 years

Pheromone traps were used to monitor the following tortricid moths, i.e. Adoxophyes orana, Archips podanus, A. rosanus, Hedya nubiferana, Pandemis heparana, Spilonota ocellana, Cydia pomonella, Cydia funebrana and Cydia molesta in the localities Brno-Tuřany (Brno-město), Nebovidy (Brno-venkov) and Prakšice (Uherské Hradiště). Other Lepidoptera non-target species were present in these target-species pheromone traps, i.e. Adoxophyes orana, Agrotis segetum, Amphipoea oculaea, Archips rosanus, Celypha striana, Cydia coronillana, Enarmonia formosana, Epiblema scutulanum, Epinotia huebneriana, Eucosma fervidana, Euxoa tritici, Hedya pruniana, H. nubiferana, Lymantria dispar, Noctua pronuba, Notocelia rosaecolana, N. roborana, Pammene albuginana, P. suspectana, Pandemis cerasana, Pyrausta rectefascialis, P. aurata, Spilonota ocellana, Yponomeuta malinellus and Zygaena purpuralis.

SEX PHEROMONE COMPONENTS OF ENARMONIA FORMOSANA (LEPIDOPTERA: TORTRICIDAE)

Abstract(E)-9-Dodecenyl acetate (E9-12:OAc) and (Z)-9-dodecenyl acetate (Z9-12:OAc) are major components of the sex pheromone of the cherry bark tortrix (CBT), Enarmonia formosana (Scopoli), in British Columbia. The compounds were identified in extracts of female pheromone glands by coupled gas chromatographic – electroantennographic detection (GC–EAD) and coupled GC – mass spectrometry. In field experiments, traps baited with E9-12:OAc or Z9-12:OAc singly were unattractive to male CBT, but in combination at ratios of 50:50 or 40:60 captured numerous males. Increasing quantities of this two-component pheromone blend resulted in increasing captures of male CBT. This binary blend at a 10-mg dose caught more CBT males that did caged virgin CBT females. Eight other EAD-active acetates identified in extracts of pheromone glands failed to enhance attractiveness of the pheromone blend. These compounds may serve to reduce cross-attraction of heterospecific male moths or may play a role in courtship behaviour. Formulations of synthetic pheromone are being evaluated for management of the CBT using mass trapping or disorientation of male CBT moths.

TOWARD PHEROMONE-BASED MATING DISRUPTION OF ENARMONIA FORMOSANA (LEPIDOPTERA: TORTRICIDAE) ON ORNAMENTAL CHERRY TREES

The potential for pheromone-mediated mating disruption of the cherry bark tortrix (CBT), Enarmonia formosana (Scopoli), was evaluated by attaching PVC tube dispensers to the trunks of mature (> 40 cm diameter at breast height) ornamental cherry trees, Prunus cvs., lining suburban streets of New Westminster and Vancouver, British Columbia. Dispensers released either a blend of (E)-9-dodecenyl acetate (E9-12:OAc, 49.5%), (Z)-9-dodecenyl acetate (Z9-12:OAc, 49.5%), and (Z)-7-decenyl acetate (Z7-10:OAc, 1%) at a rate of 29 mg/day (Exp. 1), or E9-12:OAc alone at 27 mg/day (Exp. 2), 4 mg/day (Exp. 3), or 0.5 mg/day (Exp. 4). A sticky Delta trap baited with a grey rubber septum impregnated with CBT pheromone components E9-12:OAc (40 μg), Z9-12:AOc (60 μg), and Z7-10:OAc (1 μg) was placed in each tree. Captures of male CBTs in treatment trees were significantly reduced compared with control trees in all experiments. Results suggest that disruption of pheromone-based communication in CBT around individual cherry trees is feasible with a pheromone blend or with E9-12:OAc alone, and could become part of an integrated management strategy for CBT in urban environments.