Abstract
Laboratory-caged bud worm adults readily imbibed water droplets adhering to balsam fir foliage, as well as honey-sweetened and nonsweetened water in foam-latex sponges. Performance in six aspects of reproduction improved 27 to 108% when adults imbibed water compared with nothing, and 15 to 72% when they imbibed sweetened water compared with nonsweetened water. Respective gains in total fecundity including unlaid eggs were 27 and 20%; in number of eggs laid, 56 and 64%. Imbibing water increased oocyte maturation after eclosion, and imbibing sweetened water both increased oocyte production and further increased oocyte maturation after eclosion, phenomena not previously documented for tortricines. Precipitation provides water for natural imbibing, and a possible sweetener is honeydew of the balsam twig aphid, Mindarus abietinus Koch.
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