Late Season Immigration of Boll Weevils into an Isolated Cotton Plot12

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

doi:10.1093/jee/68.5.616

Cited by 9 publications

(2 citation statements)

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“…Late-season weevil immigration into an isolated cotton plot and pheromone traps in northern Texas indicated that some of the immigrant weevils may have emigrated more than 5 km (3 miles) (Rummel et al 1975). Spurgeon et al (1997) captured unmarked weevils in pheromone traps in northeastern Mexico that were 144 to 240 km from the nearest cotton.…”

Section: Introductionmentioning

confidence: 99%

A model for long-distance dispersal of boll weevils (Coleoptera: Curculionidae)

Westbrook¹,

Eyster²,

Allen³

2010

Int J Biometeorol

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The boll weevil, Anthonomus grandis (Boheman), has been a major insect pest of cotton production in the US, accounting for yield losses and control costs on the order of several billion US dollars since the introduction of the pest in 1892. Boll weevil eradication programs have eliminated reproducing populations in nearly 94%, and progressed toward eradication within the remaining 6%, of cotton production areas. However, the ability of weevils to disperse and reinfest eradicated zones threatens to undermine the previous investment toward eradication of this pest. In this study, the HYSPLIT atmospheric dispersion model was used to simulate daily wind-aided dispersal of weevils from the Lower Rio Grande Valley (LRGV) of southern Texas and northeastern Mexico. Simulated weevil dispersal was compared with weekly capture of weevils in pheromone traps along highway trap lines between the LRGV and the South Texas/Winter Garden zone of the Texas Boll Weevil Eradication Program. A logistic regression model was fit to the probability of capturing at least one weevil in individual pheromone traps relative to specific values of simulated weevil dispersal, which resulted in 60.4% concordance, 21.3% discordance, and 18.3% ties in estimating captures and non-captures. During the first full year of active eradication with widespread insecticide applications in 2006, the dispersal model accurately estimated 71.8%, erroneously estimated 12.5%, and tied 15.7% of capture and non-capture events. Model simulations provide a temporal risk assessment over large areas of weevil reinfestation resulting from dispersal by prevailing winds. Eradication program managers can use the model risk assessment information to effectively schedule and target enhanced trapping, crop scouting, and insecticide applications.

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Section: Introductionmentioning

confidence: 99%

A model for long-distance dispersal of boll weevils (Coleoptera: Curculionidae)

Westbrook¹,

Eyster²,

Allen³

2010

Int J Biometeorol

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“…The boll weevil pheromone trap plays a key role in population monitoring and detection in eradication and management programs. In addition, these traps have been used in a wide range of ecological investigations including the seasonality of diapause (Graham et al 1979, Keeley et al 1977, Paula et al 2013, Sivasupramaniam et al 1995, utilization of alternative feeding hosts (Benedict et al 1991, Hardee et al 1999, Jones et al 1993, de Ribeiro et al 2010, emergence from overwintering and colonization of fields (Bariola et al 1984, Fuchs and Minzenmayer 1990, Leggett et al 1988, Stone et al 1990, Westbrook et al 2003, and dispersal (Guerra 1986, 1988, Pieters and Urban 1977, Rummel et al 1975. Interpretations of trap captures that rely on characters of the captured weevils are typically subject to the assumption that observations from captured weevils are representative of the larger population.…”

mentioning

confidence: 99%

Starvation-Induced Morphological Responses of the Boll Weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae)

Spurgeon¹,

Suh²

2017

JCS

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Status of the boll weevil, Anthonomus grandis grandis Boheman, as a pest of cotton (Gossypium spp.) in the United States has diminished because of progress by eradication programs. However, this pest remains of critical importance in South America, and intractable populations in extreme South Texas and northern Mexico persistently threaten reinfestation of adjoining eradicated regions. The pheromone trap is an essential tool for detecting boll weevil infestations in eradication and management programs, and captures by the traps are also used to infer aspects of weevil ecology. Information provided by traps might be more interpretable if reliable morphological indicators can be identified from captured weevils, and less ambiguous if appropriate trapping intervals were identified to maximize the usefulness of those characters. Because captured boll weevils are isolated from food, key aspects of internal morphology were observed for informational potential based on their sensitivity to change in response to starvation. Condition of the midgut, presence of well-developed accessory glands in males, and presence of eggs as well as oosorption of vitellogenic oocytes in females, were particularly responsive to starvation. However, utility of these characters in interpretation of trap captures will require assessment of weevils that have been in the traps for no more than 1–2 d. Provided recently captured weevils are assessed, the characters we identify as indicative of a local source of weevils could improve the ecological information inferred from trap captures, and improve the effectiveness and cost-efficiency of remedial actions in eradication programs.

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The ecological basis of boll weevil (Anthonomus grandis Boheman) management

Bottrell¹

1983

Agriculture, Ecosystems & Environment

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Late Season Immigration of Boll Weevils into an Isolated Cotton Plot12

Cited by 9 publications

References 0 publications

A model for long-distance dispersal of boll weevils (Coleoptera: Curculionidae)

A model for long-distance dispersal of boll weevils (Coleoptera: Curculionidae)

Starvation-Induced Morphological Responses of the Boll Weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae)

The ecological basis of boll weevil (Anthonomus grandis Boheman) management

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