Boll Weevil Immigration into Winter Habitat and Subsequent Spring and Summer Emergence123

Wade, L. J.; Rummel, D. R.

doi:10.1093/jee/71.2.173

Cited by 10 publications

(6 citation statements)

References 22 publications

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“…A number of investigators have used pheromone traps to estimate boll weevil emergence (Mitchell et al 1973, Wade and Rummel 1978, Leggett et al 1988, Fuchs and Minzenmayer 1990, and it is commonly accepted that patterns in spring trap captures reßect emergence patterns. Our results indicate that daily capture of weevils in the pheromone trap was significantly related with emergence of weevils in emergence cages, but peak values of these variables were often asynchronous.…”

Section: Discussionmentioning

confidence: 99%

Emergence of Overwintered Boll Weevils (Coleoptera: Curculionidae) in Relation to Microclimatic Factors

et al. 2003

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The boll weevil, Anthonomus grandis Boheman, enters a diapause state to survive winters in temperate regions and subsequently emerges from overwintering habitats to infest squaring cotton in the spring. Previous research has found that boll weevil overwintering emergence is closely associated with climatic patterns of temperature and precipitation. The objectives of this study were to determine the effects of temperature, humidity, and other meteorological factors on the temporal pattern of boll weevil emergence, and to compare the physiological and morphological conditions of emerged and trapped weevils. Emergence cages were infested with diapausing weevils in the fall. Daily emergence and microclimatic conditions of the leaf litter and air were monitored until the subsequent summer. Air temperature and relative humidity, incident solar radiation, and precipitation were signiÞcantly greater on emergence dates than on dates with no emergence. Emerged and trapped weevils were dissected to assess their morphology. Emerged weevils tended to exhibit greater fat body development, a higher frequency of testicular atrophy, and less ovary development than trapped weevils. None of the emerged weevils were rated extra lean and no trapped weevils were rated fat. These results are consistent with previously-reported effects of climatic factors on weevil emergence in other areas of the Cotton Belt, and add new information about the physiological and morphological characteristics of emerged weevils. This information on the dynamics and mechanisms of overwintering provides insight that should be helpful in formulating improved predictive models, risk assessments, and management strategies for the boll weevil.

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Section: Discussionmentioning

confidence: 99%

Emergence of Overwintered Boll Weevils (Coleoptera: Curculionidae) in Relation to Microclimatic Factors

et al. 2003

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“…There are numerous reports that only about 10% of the fall adults survive the winter (Hinds and Yothers, 1909;Price et al, 1985) and that those adults that emerge late in the fall are the most likely to survive (Hinds and Yothers, 1909;Wade and Rummel, 1978;Rummel and Carroll, 1983). Palmer and Cate (1992) monitored the effect of prior oviposition on winter survival and found that female boll weevils that had oviposited were much less likely to survive the winter than pre-reproductive animals, indicating that overwinter survival may be accomplished only by pre-reproductive animals, but the diapause syndrome can certainly be displayed by post-reproductive weevils.…”

Section: Introductionmentioning

confidence: 99%

Endocrine regulation of reproduction and diapause in the boll weevil, Anthonomus grandis Boheman

Taub-Montemayor

Palmer

Rankin

1997

Arch. Insect Biochem. Physiol.

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“…Although grandlure-based trap captures were often used to collect boll weevils in previous dispersal studies (Johnson et al 1975;Pieters and Urban 1977;Wade and Rummel 1978;Wolfenbarger et al 1982;Guerra 1986Guerra , 1988, the length of the attractive volatile pheromone plume can potentially attract boll weevils from areas away from the trap, thus inßuencing the results. The purposes of this study were to assess the shortrange dispersal of boll weevils from cotton Þelds during and after harvest without reliance on pheromone lures, to Þnd habitats where substantial populations persist during the noncotton-growing season, and to examine the inßuence of selected overwintering habitats on mating and fecundity in the absence of squaring cotton.…”

mentioning

confidence: 99%

Short-Range Dispersal and Overwintering Habitats of Boll Weevils (Coleoptera: Curculionidae) During and After Harvest in the Subtropics

Showler

2006

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Field experiments in the subtropical Lower Rio Grande Valley of Texas were conducted to determine the extent of adult boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), dispersal from cotton, Gossypium hirsutum L., fields during harvest operations and the noncotton-growing ("overwinter") period between 1 September and 1 February. Using unbaited large capacity boll weevil traps placed at intervals extending outward from commercial field edges, boll weevils did not move in substantial numbers during harvest much beyond 30 m, primarily in the direction of prevailing winds. From traps placed in fallow cotton; citrus; lake edge; pasture; treeline; sorghum, Sorghum bicolor (L.) Moench, and sugarcane, Saccharum spp., habitats during the overwinter period, the most boll weevils were collected in the fallow cotton fields and adjacent treelines during the fall. However, the greatest abundances of boll weevils were found in citrus orchards in the spring, before newly planted cotton fields began to square. One of the three lake edges also harbored substantial populations in the spring. Egg development in females was not detected between November and April, but in cotton fields most females were gravid between May and August when cotton fruiting bodies were available. Mated females, as determined by discoloration of the spermatheca, made up 80-100% of the female population during November and December but declined to approximately 50% in February. The lower incidence of mating indicates a reduction in physical activity, regardless of overwinter habitat, until percentages increased in March and April after cotton fields had been planted and squares were forming.

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Boll Weevil Immigration into Winter Habitat and Subsequent Spring and Summer Emergence123

Cited by 10 publications

References 22 publications

Emergence of Overwintered Boll Weevils (Coleoptera: Curculionidae) in Relation to Microclimatic Factors

Emergence of Overwintered Boll Weevils (Coleoptera: Curculionidae) in Relation to Microclimatic Factors

Endocrine regulation of reproduction and diapause in the boll weevil, Anthonomus grandis Boheman

Short-Range Dispersal and Overwintering Habitats of Boll Weevils (Coleoptera: Curculionidae) During and After Harvest in the Subtropics

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