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Seasonal phenology and mating frequency of moths in the genus Dioryctria found sympatrically in north Okanagan Valley, British Columbia seed orchards were assessed. Female moths in the abietella, auranticella, ponderosae and schuetzeella species groups were trapped in Douglas-fir, lodgepole pine and interior spruce stands. Most species were univoltine based on one peak of flight activity per season. There is evidence that the abietella group are bivoltine in this region. Females in the abietella and auranticella groups are polyandrous; ponderosae and schuetzeella females are monandrous. The sole abietella species, D. abietivorella, recorded in British Columbia can have substantial economic impacts on seed production in commercial seed orchards. Factors influencing reproductive behaviour, longevity and fecundity of D. abietivorella were investigated. Females are synovigenic and have an income-breeding mating strategy. Reproductive behaviours are delayed post-eclosion and signalling receptivity by females coincides with egg maturation, increasing with age. Female D. abietivorella experience trade-offs between reproduction and longevity. / Ecology