Partitioning Boll Weevil (Coleoptera: Curculionidae) Mortality Associated with High Temperature: Desiccation or Thermal Death?

Sterling, W. L.; Dean, Allen; Hartstack, A. W.; Witz, J. A.

doi:10.1093/ee/19.5.1457

Cited by 5 publications

(4 citation statements)

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“…Life tables were constructed (Harcourt, 1969) for boll weevil at different temperatures, using the methodology of Sterling et al (1990) for mortality assessment. Cohorts of 168, 363, 660, 388, and 604 infested squares, each containing a single egg puncture, were held at 15, 20, 25, 30 and 35 , respectively.…”

Section: Immature Mortalitymentioning

confidence: 99%

Temperature-dependent development and reproduction of the boll weevil (Coleoptera: Curculionidae)

Greenberg

Sétamou²,

Sappington

et al. 2005

Insect Science

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Effects of temperature on development, survival, and fecundity of boll weevil, Anthonomus grandis grandis Boheman, were assessed at 10, 11, 12, 15,20,25,30,35,45, and 46 °C; 65% relative humidity; and a photoperiod of 13:11 (L: D) h. The mortality of boll weevil immature stages was 100% at 12°C and decreased to 36.4% as the temperature increased to 25°C. When the temperature increased from 30 °C to 45 °C, the mortality of weevils also increased from 50.1% to 100%. From 15°C to 35°C, the bollweevilpreimaginal development rate was linearly related to temperature. The average development time of total boll weevil immature lifestages decreased 3.6-fold and the preovipositional period decreased 3.3-fold when the temperature was increased from 15°C to 30°C. The lower threshold for development was estimated at 10.9, 6.6, 7.0, and 9.0 °C for eggs, larval, pupal, and total immature stages, respectively, with total thermal time requirement to complete immature stages of 281.8 DD (degree day) (15°C) and 247.8 DD (35 °C). At 1LC and 46°C, weevil females did not oviposit. Longevity of adult females decreased 4.6-fold with increasing temperatures from 15°C to 35°C. Fecundity increased with increasing temperatures up to 30°C and significantly decreased thereafter. These findings will be useful in creating a temperature-based degree-day model for predicting the occurrence of key life stages in the field. An accurate predictor of a pest's development can be very important in determining sampling protocols, timing insecticide applications, or implementing an integrated pest management control strategy targeting susceptible life stages. KeywordsAnthonomus grandis grandis, boll weevil, temperature, development, mortality, fecundity

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Section: Immature Mortalitymentioning

confidence: 99%

Temperature-dependent development and reproduction of the boll weevil (Coleoptera: Curculionidae)

Greenberg

Sétamou²,

Sappington

et al. 2005

Insect Science

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“…This hypothesis arose from the contrasting numbers of emerging adults from the abscised structures collected in the first planting date across seasons, which were ≈3× higher for the 2014/2015 season compared to the 2017/2018 season. There are many environmental conditions faced by weevils such as dryness [45], preceding and surrounding cultivated crops [35], and cultural practices adopted after cotton harvest [46] that severely impair survival during the offseason period and significantly reduce the numbers of adult weevils colonizing new cotton fields when a season begins. Therefore, when these conditions impair weevil survival and maintenance in the area, initial numbers of infesting adults are reduced resulting in lower numbers of infested reproductive structures and, as a consequence, in lower numbers of emerging adults from infested reproductive structures.…”

Section: Discussionmentioning

confidence: 99%

Planting Date of Cotton in the Brazilian Cerrado Drives Boll Weevil (Coleoptera: Curculionidae) Infestation

Santos

Dias

Campos

et al. 2023

Insects

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Although the boll weevil (BW), Anthonomus grandis grandis (Coleoptera: Curculionidae) has been attributed to the significant losses caused to cotton yield in the Americas, the categorization as a quarentenary pest in places where it is still not occurring has increased its relevance worldwide. In areas where it is widespread, pest suppression relies on many broad-spectrum insecticide applications. However, other control tactics are sought. Considering that early-flowering cultivars escape from boll weevil infestation, we investigated if three different planting dates (November, December, and January) could alter the plant life cycle, allowing the plants to escape from boll weevil infestation. Field trials were run in two seasons (2014/2015 and 2017/2018), and variables (days required to reach each flowering stage, fruiting plant structures—undamaged and damaged by the BW, and totals—number of boll weevils on plants and that had emerged from fallen structures on the ground) were assessed over 29 and 33 weeks, respectively. Based on the number of days required to initiate and terminate the flowering stage, the time to reach the economic threshold (ET), the number of undamaged, damaged, and the total reproductive structures, we concluded that planting dates in December for the Central Cerrado of Brazil should be preferred over the other two tested dates. Cultivations run at this planting date, anticipating the flowering period initiation and termination, reduced infested flowering structures, and delayed the decision making to control the pest, when compared to the other two planting dates.

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“…In the conventional tillage treatment, where squares and other plant parts are mostly buried (A.T.S., unpublished data), cords (2000, n ϭ 45; 2002, n ϭ 20) were buried 15Ð25 cm deep for 7 d in 1.1 by 0.5 by 0.25 m (length by width by depth) trenches at randomly selected sites. Boll weevil mortality was assessed by dissecting the squares to observe boll weevil larvae and pupae that died from heat or desiccation, or predation by ants (Curry et al 1982, Sturm and Sterling 1986, Sterling et al 1990). …”

Section: Boll Weevil Survival In Naturally Infestedmentioning

confidence: 99%

Effects of Burial and Soil Condition on Postharvest Mortality of Boll Weevils (Coleoptera: Curculionidae) in Fallen Cotton Fruit

Greenberg

Showler

Sappington

et al. 2004

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Partitioning Boll Weevil (Coleoptera: Curculionidae) Mortality Associated with High Temperature: Desiccation or Thermal Death?

Cited by 5 publications

References 0 publications

Temperature-dependent development and reproduction of the boll weevil (Coleoptera: Curculionidae)

Temperature-dependent development and reproduction of the boll weevil (Coleoptera: Curculionidae)

Planting Date of Cotton in the Brazilian Cerrado Drives Boll Weevil (Coleoptera: Curculionidae) Infestation

Effects of Burial and Soil Condition on Postharvest Mortality of Boll Weevils (Coleoptera: Curculionidae) in Fallen Cotton Fruit

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