Pre-Oviposition Period, Egg Production and Mortality of Six Species of Hibernating Sap Beetles (Coleoptera: Nitidulidae)

Egg production and mortality of six spp. of hibernating sap beetles (Coleoptera: Nitidulidae), Glischrochilus fasciatus (Olivier), G. quadrisignatus (Say), G. sanguinolentus (Olivier), Lobiopa undulata (Say), (Carpophilus brachypterus (Say), and Phenolia grossa (F.), were studied. Hibernating beetles captured in October oviposited under laboratory conditions without cold treatment. Pre-oviposition periods ranged from 0–14 weeks from date of capture. Five of six spp. maintained on apple laid eggs; the exception was G. sanguinolentus, which laid eggs when maintained on tomato. G. fasciatus and G. quadrisignatus exhibited significantly increased egg production on tomato, but also demonstrated significantly higher adult mortality than on apple.