Pest categorisation of Anthonomus grandis

Jeger, Michael; Bragard, Claude; Caffier, David; Candresse, Thierry; Chatzivassiliou, Elisavet; Dehnen‐Schmutz, Katharina; Gilioli, Gianni; Grégoire, Jean‐Claude; Miret, Josep Anton Jaques; Navarro, María Navajas; Niere, Björn; Parnell, Stephen; Potting, Roel; Rafoss, Trond; Rossi, Vittorio; Urek, Gregor; Bruggen, Ariena Van; Werf, Wopke Van der; West, Jon S.; Winter, Stephan; Gardi, Ciro; Bergeretti, Filippo; MacLeod, Alan

doi:10.2903/j.efsa.2017.5074

Cited by 6 publications

(4 citation statements)

References 23 publications

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“…A notable example is the cotton boll weevil, Anthonomus grandis Boheman (Coleoptera: Curculionidae), which is considered the most damaging pest, causing substantial economic losses to the cotton industry in the Americas [ 11 ]. Its behavior, protecting larvae from insecticides, is significant, since fertilized females lay eggs (around 200 per female) on cotton flower buds, where the main damage occurs during egg laying and larval feeding [ 12 ]. In addition, some populations in Brazil have shown resistance to certain insecticides, such as beta-cyfluthrin [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Bacillus thuringiensis Bt_UNVM-84, a Novel Strain Showing Insecticidal Activity against Anthonomus grandis Boheman (Coleoptera: Curculionidae)

Sauka,

Peralta,

Pérez

et al. 2023

Toxins

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Bacillus thuringiensis is a Gram-positive bacterium known for its insecticidal proteins effective against various insect pests. However, limited strains and proteins target coleopteran pests like Anthonomous grandis Boheman, causing substantial economic losses in the cotton industry. This study focuses on characterizing a Bacillus sp. strain, isolated from Oncativo (Argentina), which exhibits ovoid to amorphous parasporal crystals and was designated Bt_UNVM-84. Its genome encodes genes for the production of two pairs of binary Vpb1/Vpa2 proteins and three Cry-like proteins showing similarity with different Cry8 proteins. Interestingly, this gene content was found to be conserved in a previously characterized Argentine isolate of B. thuringiensis designated INTA Fr7-4. SDS-PAGE analysis revealed a major band of 130 kDa that is proteolytically processed to an approximately 66-kDa protein fragment by trypsin. Bioassays performed with spore-crystal mixtures demonstrated an interesting insecticidal activity against the cotton boll weevil A. grandis neonate larvae, resulting in 91% mortality. Strain Bt_UNVM-84 is, therefore, an interesting candidate for the efficient biological control of this species, causing significant economic losses in the cotton industry in the Americas.

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Section: Introductionmentioning

confidence: 99%

Bacillus thuringiensis Bt_UNVM-84, a Novel Strain Showing Insecticidal Activity against Anthonomus grandis Boheman (Coleoptera: Curculionidae)

Sauka,

Peralta,

Pérez

et al. 2023

Toxins

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“…Boll weevil is the main pest of cotton in the Americas and a continuous threat to other cotton-growing areas [13]. The substantial economic losses caused, and the challenges faced by growers to achieve its control, categorize boll weevil as an A1 quarantine pest by the EPPO [13] or a quarantine pest in other countries and continents [14]. Boll weevil adult males and females rely on the cotton reproductive structures (buds, flowers, and bolls) for food and reproduction.…”

Section: Introductionmentioning

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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“…Among the various cotton pest species, the occidental boll weevil form Anthonomus grandis grandis Boheman, 1843 (Coleoptera: Curculionidae) (KUESTER et al, 2012;ALVARADO et al, 2017;JEGER et al, 2017) after infesting a cotton field, curative control is achieved mostly using nonselective broad-spectrum insecticides. New materials offering less impact on non-target organisms, and overall less ecotoxicity should be prioritized in a pest management program (TORRES; BUENO, 2018); however, they usually do not restrain boll weevil population growth like broad-spectrum insecticides do, considering that only the adult stage of the pest is exposed to sprays.…”

Section: Introductionmentioning

confidence: 99%

Susceptibility of boll weevil to ready-to-use insecticide mixtures

et al. 2019

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Boll weevil is the major cotton pest in Brazil, and insecticides are widely recommended against it. We determined the susceptibility of boll weevil to insecticides either in single or in mixture ready-to-use formulations, which are registered to spray cotton fields under the hypothesis that mixtures are more toxic to the target pest. Concentration-mortality curves were determined to adult species, simultaneously through dried residues and ingestion. Ten insecticide formulations were studied with five in mixture (lambda-cyhalothrin + thiamethoxam, lambda-cyhalothrin + chlorantraniliprole, thiamethoxam + chlorantraniliprole, and fenitrothion + esfenvalerate) and their five respective single formulations. Cotton leaf discs and cotyledons were dipped into insecticide dilutions prepared by diluting the commercial products into distilled water. Adult mortality was assessed 48 hours after caging adults on treated and untreated materials. The LC50s-concentrations varied from 0.004 to 0.114 g a.i./L, with a relative potency between single and mixture ones, varying from 1.37- to 29.59-fold. Furthermore, lambda-cyhalothrin and thiamethoxam in single formulation were the most toxic insecticides to boll weevil. Among insecticide mixtures, only lambda-cyhalothrin + chlorantraniliprole resulted in a synergic effect; whereas the remaining mixtures showed an antagonistic effect. Therefore, except for the mixture of lambda-cyhalothrin + chlorantraniliprole, the remaining mixtures did not enhance toxicity against the boll weevil and should be recommended only when aimed at different purposes.

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Pest categorisation of Anthonomus grandis

Abstract: The European Commission requested EFSA to conduct a pest categorisation of Anthonomus grandis (Coleoptera: Curculionidae

Cited by 6 publications

References 23 publications

Bacillus thuringiensis Bt_UNVM-84, a Novel Strain Showing Insecticidal Activity against Anthonomus grandis Boheman (Coleoptera: Curculionidae)

Bacillus thuringiensis Bt_UNVM-84, a Novel Strain Showing Insecticidal Activity against Anthonomus grandis Boheman (Coleoptera: Curculionidae)

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

Susceptibility of boll weevil to ready-to-use insecticide mixtures

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