Pseudexentera oregonana

May be distinguished from congeneric species by pheromone specificity: males are attracted to Z8-14:Ac but not to pheromones of Pseudexentera spoliana (Z10-16:Ac) or P. mali (Z,Z-8,10-16:Ac). As an early-season flier, adult activity timing may aid separation from later-emerging tortricids.

Recorded from Alberta, Manitoba, and Saskatchewan in Canada, and from Vermont in the United States.

Adults are early-season fliers.

• Populus - hostaspen

Males are attracted to synthetic Z8-14:Ac. Addition of secondary pheromone components (Z8-14:OH, 14:Ac) to the principal component does not increase male attraction.

Defoliator

Considered an economic defoliator of aspen. Pheromone-based monitoring using Z8-14:Ac lures has been developed for population detection.

• Pseudexentera spolianaBoth are early-season Pseudexentera leafrollers, but P. spoliana occurs on oak (Quercus) and uses Z10-16:Ac as its principal pheromone component. Pheromone lures are not cross-attractive.
• Pseudexentera maliBoth are economic Pseudexentera defoliators, but P. mali occurs on apple (Malus) and uses Z,Z-8,10-16:Ac as its pheromone. Pheromone lures are not cross-attractive.

• defoliator
• aspen pest
• sex pheromone
• early-season flier
• economic importance
• Tortricidae
• Olethreutinae
• Populus
• pheromone specificity

• BugGuide
• GBIF taxonomy match
• NCBI Taxonomy
• Catalogue of Life
• IDENTIFICATION OF SEX PHEROMONE COMPONENTS FOR TWO LEPIDOPTERAN DEFOLIATORS, THE OAK OLETHREUTID LEAFROLLER, PSEUDEXENTERA SPOLIANA (CLEMENS), AND THE ASPEN LEAFROLLER, PSEUDEXENTERA OREGONANA (WALSINGHAM)