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

Suh, Charles P.-C.; Spurgeon, D. W.; Westbrook, John K.

doi:10.1603/0046-225x-31.5.754

Cited by 13 publications

(11 citation statements)

References 21 publications

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“…A similar relationship between presence of food in the gut and supercooling capacity has been documented in unfed females of the ectoparasitoid Habrobracon hebetor (Say) (Hymenoptera: Braconidae) which displayed a significantly lower (∼ 8°C) mean SCP in comparison with honey‐fed females . Furthermore, the presence of solid food in the midgut significantly raised the SCP of the boll weevil, Anthonomus grandis Boheman (Coleoptera: Curculionidae) …”

Section: Discussionsupporting

confidence: 58%

Factors influencing supercooling capacity of the koinobiont endoparasitoid Venturia canescens (Hymenoptera: Ichneumonidae)

Andreadis

Spanoudis

Athanassiou

et al. 2013

Pest Management Science

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Section: Discussionsupporting

confidence: 58%

Factors influencing supercooling capacity of the koinobiont endoparasitoid Venturia canescens (Hymenoptera: Ichneumonidae)

Andreadis

Spanoudis

Athanassiou

et al. 2013

Pest Management Science

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“…This is supported by the finding that, after a 4‐day period of starvation at room temperature, during which the beetles voided their gut contents (as evidenced by faecal pellets in their vials), no significant differences were found in the SCPs of beetles collected from different crops. Studies of other insects have similarly shown that gut contents can influence their SCPs (Bale, 1980; Sømme & Block, 1982; Lee et al., 1996; Worland & Lukešová, 2000; Suh et al., 2002; Worland, 2005). Nucleation in a supercooled insect usually occurs in the gut content; less cold‐hardy food in the digestive tract freezes at a higher temperature than other body parts (Salt, 1953, 1968).…”

Section: Discussionmentioning

confidence: 96%

Factors affecting cold hardiness in the small striped flea beetle, Phyllotreta undulata

Hiiesaar¹,

Williams

Luik

et al. 2009

Entomologia Exp Applicata

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The striped flea beetle, Phyllotreta undulata Kutschera (Coleoptera: Chrysomelidae), is a pest of cruciferous crops. It overwinters as an adult. During winter in northern European countries, such as Estonia, it is subject to sometimes severe temperatures that may fluctuate daily, over the season, and between seasons. The objective of this study was to investigate factors that affect its cold hardiness. In a series of five experiments, the effects of food plant, starvation, and acclimatization on the beetles’ ability to supercool and survive exposure to sub‐zero temperatures was investigated. The supercooling points (SCP) of overwintered beetles field‐collected from white mustard and Indian mustard differed from those caught from white cabbage and oilseed rape, but these differences disappeared after a 4‐day period of starvation at room temperature, indicating that gut content probably influences the potential to supercool. The duration and temperature of acclimation affected SCP in overwintered beetles. The decrease in SCP was more rapid at 22 °C than at 0 °C, probably because of faster dehydration and gut evacuation at the higher temperature. Acclimation at 0 °C for a week increased the ability of overwintered beetles to survive sub‐zero temperatures, lowering both SCP and lower lethal temperature (LLT50). Some pre‐freeze mortality occurred; SCP and LLT50 were correlated but the latter was a constant 3 °C higher than the former. The SCP of field‐collected pre‐winter beetles decreased gradually during the autumn. It also decreased when field‐collected pre‐winter beetles were acclimated at 0 °C in the laboratory, attaining its lowest level after 18 days. Phyllotreta undulata is well‐adapted to unstable and sometimes severe winter conditions; its high potential to supercool enhances its cold hardiness and ability to survive short periods at sub‐zero temperatures although it cannot survive freezing of its body fluids.

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“…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.…”

Section: Discussionmentioning

confidence: 62%

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

Sappington

Arnold

Brashears

et al. 2006

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We characterized the level of risk of boll weevil, Anthonomus grandis grandis Boheman, reintroduction to an eradication zone posed by dispersal from cotton modules during and after transport to the gin. Mark-release-recapture experiments in August and September in Texas indicated that most weevils disperse rapidly from the module surface, temperature permitting, unless confined under a module tarp, where most died. Nevertheless, 1-5% of released weevils were recovered alive after 24 h on the side and top surfaces of modules, representing potential dispersants. Mortality of boll weevils caged on the top surface of a module was 95-100% after 1-4 d when maximum air temperatures were > or = 33 degrees C and 72-100% when minimum temperatures were -7 degrees C or lower, but a few survived even after experiencing a minimum daily temperature of -12 degrees C. Under warm (daily maximum temperatures > or = 25 degrees C) and cold (daily minimum temperatures < or = 0 degrees C) weather conditions, survival was higher under the tarp than on the open surface of the module (20 versus 7% and 42 versus 26%, respectively), but mortality was 100% in both locations when temperatures reached 34 degrees C. Our results indicate that although the threat to an eradication zone posed by boll weevil dispersal from an infested module is very low under most environmental conditions, it is probably greatest when 1) a module is constructed and transported from an infested zone during weather too cool for flight, followed by warm weather favorable for flight at the gin yard; or 2) such a module is transported immediately after construction in moderate-to-warm weather.

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

Cited by 13 publications

References 21 publications

Factors influencing supercooling capacity of the koinobiont endoparasitoid Venturia canescens (Hymenoptera: Ichneumonidae)

Factors influencing supercooling capacity of the koinobiont endoparasitoid Venturia canescens (Hymenoptera: Ichneumonidae)

Factors affecting cold hardiness in the small striped flea beetle, Phyllotreta undulata

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

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