Seleção De Isolados De Beauveria Bassiana Para O Controle De Adultos Do Bicudo-Do-Algodoeiro Anthonomus Grandis (Coleoptera: Curculionidae)

Giometti, C.S.; Almeida, José Eduardo Marcondes de; Leite, L. G.; Zappelini, L.O.

doi:10.1590/1808-1657v77p1672010

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…Thus, in addition to increasing the number of dry bolls, the boll weevil population is not reduced by the direct effect of defoliants. On the other hand, our results demonstrate that the defoliants drastically reduced the number of green leaves, squares and green bolls from 200 days of age (or 20 days after application), reducing the cotton plant structures that could be used as food and reproductive hosts by boll weevils (Azambuja & Degrande, 2015; Degrande, 1998; Gabriel, 2002). Such results demonstrate how agricultural practices in cotton production may influence boll weevil management throughout the off‐season (Greenberg, Showler, et al, 2004; Pires et al, 2017; Ribeiro et al, 2015; Showler, 2003).…”

Section: Discussionmentioning

confidence: 73%

“…In these treatments, 97% of the fruits were ready for harvest (open bolls) at 200 days of age. Thus, cotton can be harvested earlier with the use of these treatments, making it possible to extend the cotton off‐season, which is the main boll weevil reproductive host (Azambuja & Degrande, 2015; Gabriel, 2002; Showler, 2007). Moreover, on this date, all defoliants reduced the number of green leaves, squares and green bolls to values close to zero, making scarce the structures that can be used as reproductive hosts and foraging resources for boll weevil.…”

Section: Discussionmentioning

confidence: 99%

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Cotton harvest aid products can favour the formation of structures that protect Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae) from insecticide application

do Vale,

de Moraes,

dos Santos

et al. 2023

Agri and Forest Entomology

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Cotton, Gossypium hirsutum L., has an indeterminate growth habit. Therefore, the plant growing season leads to crops with a large amount of immature vegetative and reproductive structures, thus requiring the use of defoliants to promote the abscission of these structures and enable mechanical harvesting. However, the use of defoliants can negatively affect the development of immature fruits. This study examined the influence of defoliants, applied alone or in combination with each other, on the formation of dry and malformed reproductive structures of cotton, known as dry bolls, used as shelter by the boll weevil Anthonomus grandis grandis Boheman during cotton fallow periods. We investigated the influence of defoliants, applied alone, or combined with each other or with insecticide, on boll weevil mortality. In addition, we tested the susceptibility of boll weevils inside dry bolls to the action of insecticide. The results indicate that the defoliants can increase the number of dry bolls by up to 3.4 times, in relation to the control, 20 days after its application. The studied defoliants did not exert toxic effects on boll weevil when applied separately, nor synergistic effects of toxicity when combined with each other or with insecticides. At the end of the insecticide spraying experiments, the number of live boll weevils was 8.4 times greater when the insect was housed in dry capsules than when not housed. Defoliants can increase the formation of dry bolls, which can reduce boll weevil mortality due to insecticide application and hamper pest management.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Cotton harvest aid products can favour the formation of structures that protect Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae) from insecticide application

do Vale,

de Moraes,

dos Santos

et al. 2023

Agri and Forest Entomology

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Selection of Beauveria bassiana sensu lato and Metarhizium anisopliae sensu lato isolates as microbial control agents against the boll weevil (Anthonomus grandis) in Argentina

Nussenbaum

Lecuona

2012

Journal of Invertebrate Pathology

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Different strategies to kill the host presented byMetarhizium anisopliaeandBeauveria bassiana

et al. 2018

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Studies conducted over the last decades have shown the potential of entomopathogenic fungi for the biocontrol of some insect pests. Entomopathogenic fungi infect their host through the cuticle, so they do not need to be ingested to be effective. These fungi also secrete secondary metabolites and proteins that are toxic to insect pests. In this context, we analyzed the pathogenicity of Metarhizium anisopliae (Metschn.) strains IBCB 384 and IBCB 425 and Beauveria bassiana (Bals.-Criv.) Vuill. strains E 1764 and E 3158 against Galleria mellonella (Linn.) larvae, during pre-invasion and post-invasion phases. The results showed M. anisopliae, especially strain IBCB 384, was most virulent in the pre-invasion phase against G. mellonella, whereas B. bassiana, especially strain E 1764, was most virulent in the post-invasion phase. During in vivo development and in the production of toxic serum, B. bassiana E 3158 was the most virulent. Different fungal growth (or toxin) strategies were observed for studied strains. Metarhizium anisopliae IBCB 425 prioritizes the growth strategy, whereas strain IBCB 384 and B. bassiana strains E 1764 and E 3158 have a toxic strategy. All strains have pathogenicity against G. mellonella, indicating their possible use for biocontrol.

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Seleção De Isolados De Beauveria Bassiana Para O Controle De Adultos Do Bicudo-Do-Algodoeiro Anthonomus Grandis (Coleoptera: Curculionidae)

Cited by 6 publications

References 7 publications

Cotton harvest aid products can favour the formation of structures that protect Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae) from insecticide application

Cotton harvest aid products can favour the formation of structures that protect Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae) from insecticide application

Selection of Beauveria bassiana sensu lato and Metarhizium anisopliae sensu lato isolates as microbial control agents against the boll weevil (Anthonomus grandis) in Argentina

Different strategies to kill the host presented byMetarhizium anisopliaeandBeauveria bassiana

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