Survival of Diapausing and Nondiapausing Boll Weevlls (Coleoptera: Curculionidae) Subjected to Freezing Temperatures

Influence of Feeding Status and Physiological Condition on Supercooling Points of Adult Boll Weevils (Coleoptera: Curculionidae)

“…In contrast, Slosser et al (1996) found that younger diapausing weevils could tolerate freezing conditions better than older weevils. However, they did not determine whether weevil mortality was caused by freezing, and secondly, exposures to freezing temperatures that produced mortality in their studies were of longer duration than those we examined.…”

“…Survival of weevils following exposure to subfreezing temperatures has been proposed as a method for distinguishing diapausing from nondiapausing boll weevils (Slosser et al 1996). We found that fat body content, a character often used to assess diapause Values followed by the same letter are not signiÞcantly different (␣ ϭ 0.05, Ryan-Einot-Gabriel-Welsch multiple range test).…”

A Predictive Model for the Survival of Overwintering Bean Leaf Beetles (Coleoptera: Chrysomelidae)

“…Collected beetles were placed individually in a sample bag and kept at 24ЊC for 100 h. Subsequently, beetle activity was examined. If the beetles were able to stand and walk, they were considered alive, otherwise they were counted as dead (Boiteau et al 1980, Slosser et al 1996. All beetles, including dead or alive, were stored in a refrigerator at Ϫ15ЊC for studies of entomogenous fungi and ectoparasitic mites.…”

Dispersal of Boll Weevils (Coleoptera: Curculionidae) from Cotton Modules Before Ginning

“…The weevils used in the caged survival study were from a laboratory-reared colony selected for low incidence of diapause. Although mortality because of acute freezing apparently is not related to diapause status (Suh et al 2002), diapause has been shown to confer an increase in survivability of subfreezing conditions over that of nondiapausing weevils (Slosser et al 1996). Thus, boll weevils from a natural population, which would contain a higher percentage of diapausing individuals than those tested in this study, might be even more likely than the latter to survive periods of cold temperature.…”