Circadian rhythms of feeding, oviposition, and emergence of the boll weevil (Coleoptera: Curculionidae)

Greenberg, S. M.; Armstrong, J. Scott; Sétamou, Mamoudou; Sappington, Thomas W.; Coleman, R. J.; Liu, Tong‐Xian

doi:10.1111/j.1744-7917.2006.00116.x

Cited by 6 publications

(2 citation statements)

References 20 publications

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“…For example, photoperiod may not be the best cue for synchronizing with the environment if an insect develops in a lightrestricted environment. Some data support this hypothesis in insects that pupate below ground, where thermoperiod cues were shown to regulate emergence (Zdarek and Denlinger, 1995;Short et al, 2016;Miyazaki et al, 2011;Watari and Tanaka, 2014;Greenberg et al, 2006). Insects that pupate in other types of light-restricted habitats such as nests, natural or artificial cavities, and brood cells may also rely on thermoperiod cues.…”

Section: Introductionmentioning

confidence: 90%

Cues for cavity nesters: investigating relevant zeitgebers for emerging leafcutting bees, Megachile rotundata

Bennett

Rinehart

Yocum

et al. 2018

Journal of Experimental Biology

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Photoperiod is considered the universal zeitgeber, regulating physiological processes in numerous animals. However, for animals in light-restricted habitats (e.g. burrows or cavities), thermoperiod may be a more important cue. Our study tested this hypothesis in the alfalfa leafcutting bee, , which nests in cavities and undergoes development within a brood cell. We assessed the role of environmental cues (thermoperiod and photoperiod) on the process of adult emergence by examining: (1) whether those cues direct circadian rhythms, (2) which cue is more dominant and (3) how sensitive developing bees and emergence-ready adults are to cues. Although we found that 20% of light penetrates the brood cell, and bees respond to photoperiod by synchronizing emergence, thermoperiod is the dominant cue. When presented with a conflicting zeitgeber, bees entrained to the thermophase instead of the photophase. When temperature cues were removed, we observed free-running of emergence, indicating that underlying circadian mechanisms can be synchronized by daily fluctuations in temperature. We also found that emerging bees were highly sensitive to even small increases in temperature, entraining to a ramp speed of 0.33°C h The response and sensitivity to temperature cues suggest that evolved a temperature-mediated clock to time emergence from light-restricted cavities.

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Section: Introductionmentioning

confidence: 90%

Cues for cavity nesters: investigating relevant zeitgebers for emerging leafcutting bees, Megachile rotundata

Bennett

Rinehart

Yocum

et al. 2018

Journal of Experimental Biology

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“…This nocturnal adherence of unfamiliar sVOCs on the host plant may affect oviposition of herbivorous insects that lay eggs during colder evening dusk or early morning dawn or during total darkness such as many moth species (Uematsu and Yoshikawa 2002;Graf et al 2015;Sambaraju et al 2016). In theory, oviposition of insect species that prefer to lay eggs in daytime such as weevils (Greenberg et al 2006) or plant bugs (Egonyu 2013) will be less affected, because unfamiliar sVOCs will have already evaporated from the plant surfaces. Limited evidence (Himanen et al 2015) suggests that orientation of natural enemies on herbivore-damaged plants is not influenced by adhered compounds.…”

Section: Introductionmentioning

confidence: 99%

Foliar behaviour of biogenic semi-volatiles: potential applications in sustainable pest management

Mofikoya

Bui

Kivimäenpää

et al. 2019

Arthropod-Plant Interactions

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Plants emit an extremely diverse bouquet of volatile organic compounds (VOCs) from their above-ground and below-ground parts. Emissions are constitutive or induced, e.g. by herbivores. VOCs can be classified as highly volatile, volatile and semivolatile compounds. Sesquiterpenes (SQTs) are typical semi-volatile organic compounds (sVOCs) released by plants. Similarly, herbivore-induced homoterpenes and methyl salicylate also have relatively low volatility. SVOCs have a high boiling point (> 240 °C) and a vapour pressure below 0.005 kPa at 25 °C. Glandular trichomes on plant surfaces can store SQTs in mixtures with more volatile VOCs, which are released into the air by diffusion or after gland rupture. The sVOCs stored in glandular trichomes often have repellent effects on herbivores, while herbivore-induced sVOCs are known for their attractiveness to natural enemies of herbivores, i.e. they act in indirect chemical defence of plants. Due to their low volatility, sVOCs produced by plants may easily adhere to the surfaces of emitter and neighbouring plants during the colder temperatures that plants face, e.g. at night. On the foliage of neighbouring receiver plants, sVOCs may act in direct and indirect defence of that plant species. When the temperature rises again, sVOCs are released into the atmosphere. The semi-volatile reaction products of highly volatile plant monoterpenes and photochemical pollutants such as ozone could constitute further sVOCs on plant leaf surfaces. Here, we review recent literature of the plant surface-environment interaction of biogenic sVOCs and particularly evaluate potential crop protection strategies such as intercropping and companion planting using sVOC-emitting species. Foliage typically forms the widest surfaces on crop plants, and foliar herbivory is a major type of pest damage during the vegetative stage of crop plants. Foliage is also a major source of herbivore-induced VOC emissions. Consequently, we focus on foliage-mediated sVOCs and their potential in pest management.

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Dispersal of boll weevil toward and within the cotton plant and implications for insecticide exposure

Arruda

Torres

Rolim³

et al. 2020

Pest Management Science

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BACKGROUND Immature stages of boll weevil complete development endophytically leaving only the adult stage accessible for chemical control. We tested the hypothesis that boll weevil colonization of the cotton plants significantly affects their exposure to sprayed insecticides. We determined the adult dispersal toward and within cotton plants, lethal time (LT), and residual control by recommended insecticides (malathion, carbosulfan, thiamethoxam, fipronil, beta‐cyfluthrin, lambda‐cyhalothrin, and thiamethoxam + lambda‐cyhalothrin) through dried residue exposure and residual control regarding the leaf position in the upper and the lower thirds of the treated plant canopy. RESULTS Newly emerged adults from fallen buds reached the cotton plants by walking (80%) and most of the time settling on cotton bolls in the lower part of the plants (78%). Irrespective of sex and mating status, adults released on the upper part of the plant remained longer on the same release site than the lower part, with some individuals remaining up to 50 h on the same flower bud. The shortest LT90 was found with thiamethoxam (106 h). Fipronil and malathion, respectively, provided the longest (>144 h) and shortest (24 h) residual control times and caused boll weevil mortality above 80%. CONCLUSIONS These findings suggest that weevils accessing the cotton plants exhibited within‐plant distribution that minimizes their contact with insecticide residue on plant foliage. Furthermore, short residual control with malathion, the most used insecticide against boll weevil, and the low susceptibility exhibited by the tested population to pyrethroids highlight the current challenges faced for boll weevil control in Brazilian cotton fields. © 2020 Society of Chemical Industry

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Circadian rhythms of feeding, oviposition, and emergence of the boll weevil (Coleoptera: Curculionidae)

Abstract: Circadian rhythm of feeding, oviposition, and emergence of boll weevil adults were determined at five different photophases (24, 14, 12, 10, and 0 hours) and a constant 27°C temperature, 65%

Cited by 6 publications

References 20 publications

Cues for cavity nesters: investigating relevant zeitgebers for emerging leafcutting bees, Megachile rotundata

Cues for cavity nesters: investigating relevant zeitgebers for emerging leafcutting bees, Megachile rotundata

Foliar behaviour of biogenic semi-volatiles: potential applications in sustainable pest management

Dispersal of boll weevil toward and within the cotton plant and implications for insecticide exposure

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