Climatic Data-Based Analysis of Boll Weevil (Coleoptera: Curculionidae) Overwintering Survival and Spring Emergence

Parajulee, Megha N.; Wilson, L. T.; Rummel, D. R.; Carroll, Stanley C.; Trichilo, P. J.

doi:10.1093/ee/25.5.882

Cited by 20 publications

(30 citation statements)

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“…2003. c of DD would require intimate knowledge of overwintering habitat and insulation, and ambient air temperatures overestimate positive DD by 6.5Ð15.7% (Parajulee et al 1997). Stone et al (1990) reported that, over a 7-yr study, the variation in emergence patterns can be Ͼ30 d. Although Parajulee et al (2001) developed a model for boll weevil survivorship on the Rolling Plains, overwintering habitats, food sources (Chandler and Wright 1991), the timing of weevil entry into overwintering habitat (Sterling 1971, Wade and, the date at which to begin calculating DD (Parajulee et al 1996), and the relative incidence of diapause, among other conceivable parameters, would differ in subtropical and tropical conditions where boll weevils are active and reproducing year-round (Guerra et al 1982).…”

Section: Discussionmentioning

confidence: 99%

Effects of Planting Dates on Boll Weevils (Coleoptera: Curculionidae) and Cotton Fruit in the Subtropics

Showler¹,

Greenberg²,

Scott³

et al. 2005

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The effects of planting dates 2-3-wk apart on boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), field-level populations, and feeding and oviposition damage to cotton, Gossypium hirsutum L., squares and bolls, were studied during 2002 and 2003 in the Lower Rio Grande Valley of Texas. Squares were 44-56% more abundant in some later planted treatments than in the earlier planted treatments, but mean cumulative numbers of oviposition- and feeding-damaged squares were 2.7 - 4.8-fold greater in some later planted treatments than in earlier treatments. Increased square production in later planted cotton was offset by boll weevil infestations that occurred when squares are most vulnerable and contribute most toward the pest's reproduction. Early planting avoided boll weevil population buildups in the field when large squares were abundant. Lint yields in 2002 did not differ significantly between the planting date treatments, but in 2003, mean yield in the middle treatment was 23% greater than in the early and late-planted treatments. Insecticide sprays in the earliest planted treatment of each year, based on the 10% damaged squares threshold, were >33% and >43% fewer than in the corresponding middle and latest planting treatments, respectively. Delayed planting, relative to the onset of favorable cotton-growing weather, at the field level, even when not applied uniformly on an areawide scale, is more cost-effective than planting too early or too late.

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Section: Discussionmentioning

confidence: 99%

Effects of Planting Dates on Boll Weevils (Coleoptera: Curculionidae) and Cotton Fruit in the Subtropics

Showler¹,

Greenberg²,

Scott³

et al. 2005

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“…Low winter temperatures in most of the boll weevilÕs distribution in the United States cause substantial mortality in overwintering populations (Stone et al 1990, Parajulee et al 1996 which has assisted control programs to eradicate or suppress boll weevil infestations (Smith 1998). The Lower Rio Grande Valley of Texas, however, is a subtropical region of the United States with active, breeding boll weevil populations year-round (Guerra et al 1982, Summy et al 1988).…”

mentioning

confidence: 99%

Relationships of Different Cotton Square Sizes to Boll Weevil (Coleoptera: Curculionidae) Feeding and Oviposition in Field Conditions

Showler

2005

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Feeding and oviposition preferences of the boll weevil, Anthonomus grandis grandis Boheman, for four different cotton square size classes in field conditions of the Lower Rio Grande Valley of Texas were studied during 2002 and 2003. Percentages of large (5.5-8-mm-diameter) squares used for oviposition and feeding were greater than pinhead or match-head squares. The preference for large squares as food and associated accelerated fecundity explain the substantial boll weevil population buildups that occur after large squares form. Medium-sized (3-5.5-mm-diameter) squares also were used but less than large squares. Feeding and oviposition on pinhead (1-2-mm-diameter) and match-head (2-3-mm-diameter) squares were negligible. Although planting date did not affect oviposition or feeding preferences for squares larger than pinhead and match-head sizes, the least amount of either damage to large squares was found in the earliest plantings during both years. This study indicates that pinhead and match-head squares, regardless of planting date, do not require pesticide applications to protect against boll weevil feeding and oviposition.

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“…Boll weevils move in the spring from overwintering habitats to young squaring cotton (Smith et al 1965, White andRummel 1978) in response to the cotton plant volatiles, including ethylene (Duffey and Powell 1979), and aggregation pheromone from boll weevils already in the Þeld (Parajulee and Slosser 2001). After overwintering mortality caused by low temperatures and reduction of food (Parajulee et al 1996), boll weevil populations are sparse.…”

Section: Differences In Mean (؎ Se) Percentage Variation Between Prmentioning

confidence: 99%

“…Low winter temperatures in most of the boll weevilÕs distribution in the United States cause mortality in overwintering populations (Stone et al 1990, Parajulee et al 1996 and this mortality has assisted control programs to eradicate or suppress boll weevil infestations (Smith 1998). The Texas Lower Rio Grande Valley, however, is a unique subtropical region of the United States that supports active, breeding boll weevil populations year round , Summy et al 1988) despite mandatory cotton stalk destruction before 1 September and prohibition on planting until 1 February (Texas Department of Agriculture 1998).…”

mentioning

confidence: 99%

Effects of Routine Late-Season Field Operations on Numbers of Boll Weevils (Coleoptera: Curculionidae) Captured in Large-Capacity Pheromone Traps

Showler¹

2003

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Flat and cylindrical adhesive boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), pheromone traps captured significantly more (P < or = 0.05) boll weevils than the Hercon (Hercon Environmental, Emigsville, PA) trap during the late cotton-growing season, and larger adhesive areas were associated with higher captures; a flat plywood board collected the most boll weevils because it had the largest surface area. The flat board trap, chosen for measuring large late-season adult boll weevil populations common to the Lower Rio Grande Valley of Texas in 2000 and 2001, collected more (P < or = 0.05) weevils when deployed in proximity to natural and cultivated perennial vegetation, and mean numbers of captured boll weevils were higher (P < or = 0.0001) on the leeward sides of the board traps than on the windward sides. The board trap had an estimated potential capacity of approximately 27,800 boll weevils, and the large capacity of the board trap allowed for more accurate measurements of large adult boll weevil populations than the more limited Hercon trap. Measurement of adult boll weevil numbers after the routine field operations of defoliation, harvest, shredding, and stalk-pulling, demonstrated that large populations of boll weevils persist in cotton fields even after the cotton crop has been destroyed. Increases (P < or = 0.05) in the percentage variation of trapped boll weevils relative to the numbers collected just before each field operation were observed after defoliation, harvest, shredding, and stalk-pulling, but the percentage variations followed a quadratic pattern with significant correlation (P < 0.0001; 0.59 < adjusted r2 < 0.73). Numbers of adult boll weevils caught on board traps deployed at 15.24-m intervals on windward and leeward edges of cotton fields suggested that boll weevil populations in flight after field disturbances might be affected by large-capacity trapping.

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Climatic Data-Based Analysis of Boll Weevil (Coleoptera: Curculionidae) Overwintering Survival and Spring Emergence

Cited by 20 publications

References 0 publications

Effects of Planting Dates on Boll Weevils (Coleoptera: Curculionidae) and Cotton Fruit in the Subtropics

Effects of Planting Dates on Boll Weevils (Coleoptera: Curculionidae) and Cotton Fruit in the Subtropics

Relationships of Different Cotton Square Sizes to Boll Weevil (Coleoptera: Curculionidae) Feeding and Oviposition in Field Conditions

Effects of Routine Late-Season Field Operations on Numbers of Boll Weevils (Coleoptera: Curculionidae) Captured in Large-Capacity Pheromone Traps

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