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

Showler, Allan T.

doi:10.1603/0022-0493-98.5.1572

Cited by 24 publications

(15 citation statements)

References 24 publications

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“…Additionally, all genotypes showed a positive correlation between boll weevil fresh body weight and size of cotton squares. This result is consistent with the fact that the boll weevil prefers to lay eggs on squares larger than 6 mm in diameter (Showler, 2005), which contain more nutrients for the developing larvae. Similarly, Michelotto et al (2007) found that cotton squares with larger diameters produced larger boll weevils.…”

Section: Discussionsupporting

confidence: 88%

Interaction ofAnthonomus grandisand cotton genotypes: biological and behavioral responses

Silva

Silva-Torres

Moraes

et al. 2015

Entomologia Exp Applicata

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The boll weevil, Anthonomus grandisBoheman (Coleoptera: Curculionidae), is a key pest of cotton, Gossypium hirsutumL. (Malvaceae). Knowledge about boll weevil feeding and oviposition behavior and its response to plant volatiles can underpin our understanding of host plant resistance, and contribute to improved monitoring and mass capture of this pest. Boll weevil oviposition preference and immature development in four cotton genotypes (CNPA TB90, TB85, TB15, and BRS Rubi) were investigated in the laboratory and greenhouse. Volatile organic compounds (VOCs) produced by TB90 and Rubi genotypes were obtained from herbivore‐damaged and undamaged control plants at two phenological stages – vegetative (prior to squaring) and reproductive (during squaring) – and four collection times – 24, 48, 72, and 96 h following herbivore damage. The boll weevil exhibited similar feeding and oviposition behavior across the four tested cotton genotypes. The chemical profiles of herbivore‐damaged plants of both genotypes across the two phenological stages were qualitatively similar, but differed in the amount of volatiles produced. Boll weevil response to VOC extracts was studied using a Y‐tube olfactometer. The boll weevil exhibited similar feeding and oviposition behavior at the four tested cotton genotypes, although delayed development and production of smaller adults was found when fed TB85. The chemical profile of herbivore‐damaged plants of both genotypes at the two phenological stages and time periods (24–96 h) was similar qualitatively, with 30 identified compounds, but differed in the amount of volatiles produced. Additionally, boll weevil olfactory response was positive to herbivory‐induced volatiles. The results help to understand the interaction between A. grandis and cotton plants, and why it is difficult to obtain cotton genotypes possessing constitutive resistance to this pest.

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Section: Discussionsupporting

confidence: 88%

Interaction ofAnthonomus grandisand cotton genotypes: biological and behavioral responses

Silva

Silva-Torres

Moraes

et al. 2015

Entomologia Exp Applicata

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“…Boll weevils have long been known to feed and reproduce on cotton squares and bolls (Hunter & Pierce, 1912;Burke et al, 1986). Large squares, however, are preferred under field conditions for feeding and oviposition more than smaller sizes (Showler, 2005), in part because large squares as a food source are associated with enhanced gravidity and fecundity (Showler, 2004) and because the reproductive portion is of sufficient size for larvae to complete development within. Cate & Skinner (1978) claimed that boll weevils are primarily pollen feeders although studies have not demonstrated the capacity of pollen alone to sustain them, nor have digestive tracts been examined for non-pollen food sources.…”

Section: Discussionmentioning

confidence: 99%

“…Under field conditions, adult boll weevils feed more on large squares (5.5-8 mm in diameter) than on pinhead-(1-2 mm in diameter) or match head-sized (2-3 mm in diameter) squares (Showler, 2005). Young (5-10-day-old) bolls, however, were fed on more often than large squares, but feeding on large squares was associated with greater fecundity ( ≥ 2.7-fold) than in boll weevils fed match-head squares or bolls of any age (Showler, 2004).…”

Section: Introductionmentioning

confidence: 96%

Longevity and egg development of adult female boll weevils fed exclusively on different parts and stages of cotton fruiting bodies

Showler¹

2008

Entomologia Exp Applicata

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The capacities of the rind (i.e., the developing calyx and petals of squares; and the outer casing, or husk, of bolls) and the internal reproductive portion of cotton, Gossypium hirsutum L. (Malvaceae), squares of three sizes, and bolls of three ages to influence adult female boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), longevity and egg production were evaluated in laboratory bioassays. While feeding on the reproductive portion of squares was expected to support adult boll weevils for considerable periods of time (e.g., medium square reproductive portion: ≈185 days), feeding on rinds also resulted in substantial longevity (e.g., medium square rind: ≈120 days). As anticipated, feeding on the reproductive portion of squares resulted in formation of chorionated eggs in mated females, but a diet comprised exclusively of rinds, particularly from large squares, was associated with gravidity and high fecundity relative to rinds of young and mature bolls. The reproductive portion and rind of post‐bloom and young bolls as sources of food resulted in limited gravidity while mature bolls were not associated with any egg formation. These findings further our understanding of how boll weevils feed on different parts of the cotton plant and how those parts as food sources are related to the biology and ecology of the boll weevil.

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“…During the evaluations, five plants per plot were uprooted and analyzed by dividing them into three parts (upper, middle and lower), to record the vertical distribution of squares punctured by the boll weevil for feeding and oviposition in the plant canopy. The number of squares used for feeding and oviposition of the pest was recorded in view of the preference of A. grandis for this plant part (SHOWLER, 2005).…”

Section: Methodsmentioning

confidence: 99%

“…The damage caused by the pest results from the use of cotton flower and fruit structures for oviposition of adults and feeding of both larvae and adults of A. grandis. The boll weevil prefers to feed and lay eggs on developed squares, with a diameter of 5.5 to 8 mm (SHOWLER, 2005). It was observed that fecundity and oviposition of the weevil females are higher after feeding on these developed buds (SHOWLER, 2004).…”

Section: Introductionmentioning

confidence: 99%

Within plant distribution of Anthonomus grandis (Coleoptera: Curculionidae) feeding and oviposition damages in cotton cultivars

et al. 2013

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The feeding and oviposition behavior of boll weevil in new cotton cultivars is essential for an adequate management. The objective of this study was to evaluate the vertical distribution of squares punctured for feeding and oviposition of the pest in the cultivars NuOPAL, DeltaOPAL, FMT-701, FMX-910 and FMX-993, and record the most and least preferred times of feeding and oviposition. The number of squares used for boll weevil feeding and oviposition were evaluated weekly in three parts of plant canopy. It was observed that, regardless the cultivar, A. grandis preferred to lay eggs in squares located in the upper part and feed on squares in the middle and upper parts. The boll weevil preferred to feed on cultivar FMT-701 in the beginning of the period of cotton flowering and fruiting, and the cultivars NuOPAL, DeltaOPAL, FMX-910 and FMX-993 throughout the whole period of flowering and fruiting. A. grandis preferred to lay eggs on cultivars NuOPAL, FMT-701 and FMX-993 at the beginning and end of flowering and fruiting of plants, while the cultivars DeltaOPAL and FMX-910 are used for oviposition throughout the period of flowering and fruiting.

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

Cited by 24 publications

References 24 publications

Interaction ofAnthonomus grandisand cotton genotypes: biological and behavioral responses

Interaction ofAnthonomus grandisand cotton genotypes: biological and behavioral responses

Longevity and egg development of adult female boll weevils fed exclusively on different parts and stages of cotton fruiting bodies

Within plant distribution of Anthonomus grandis (Coleoptera: Curculionidae) feeding and oviposition damages in cotton cultivars

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