Article
Agronomy
Janaina C. S. Cunha, Loren J. Rivera Vega, Jorge B. Torres, Charles P. C. Suh, Gregory A. Sword
Summary: Fungal treatments significantly reduce boll weevil reproduction on cotton plants, with fewer larvae hatching and fewer adults emerging. The developmental time from oviposition to adult emergence is also delayed in the fungal-treated plants. Additionally, B. bassiana-treated plants show increased tolerance against boll weevil attacks.
PEST MANAGEMENT SCIENCE
(2023)
Article
Entomology
Patricia J. Santos, Antonio M. Dias, Karolayne L. Campos, Ana C. A. Araujo, Andrea A. S. Oliveira, Fabio A. Suinaga, Jorge B. Torres, Cristina S. Bastos
Summary: Cotton is commonly cultivated in subtropical and seasonally dry tropical regions. The boll weevil, a beetle, poses a significant threat to cotton crops in the Americas, causing substantial yield losses. The planting dates of cotton plants can affect boll weevil infestation, with mid-planting dates being less favorable for weevil damage. Alternatives to broad-spectrum insecticide applications need to be explored for boll weevil management.
Article
Agronomy
Lucas S. Arruda, Jorge B. Torres, Guilherme G. Rolim, Christian S. A. Silva-Torres
Summary: Boll weevil adults exhibit within-plant distribution that minimizes contact with insecticide residue on plant foliage. Short residual control with malathion, the most commonly used insecticide, and low susceptibility to pyrethroids pose challenges for boll weevil control in Brazilian cotton fields.
PEST MANAGEMENT SCIENCE
(2021)
Article
Agronomy
Elcio Antonio Paim, Antonio Macedo Dias, Allan T. Showler, Karolayne Lopes Campos, Andrea Aparecida Santos Oliveira, Pedro Paulo Castro Grillo, Cristina Schetino Bastos
Summary: The study demonstrates that altering row spacing can effectively reduce boll weevil infestations and improve yield and fiber quality in low-input systems in Brazil. Narrow row spacing was the least effective, while conventional and wide spacings delayed boll weevil control interventions and resulted in lower numbers of boll weevils early in the season.
Article
Entomology
Cristina Jensen Vasconcelos Marquesini, Daniela Hipolito Maggio, Raul Narciso Carvalho Guedes, Alberto Soares Correa
Summary: The research revealed low genetic diversity of the cotton boll weevil in Brazil with only two haplotypes. These haplotypes are genetically related to individuals from the eastern region of the USA and Mexico, suggesting a recent invasion event in Brazil. The genetic structure of the cotton boll weevil in different regions of Brazil shows low dispersion, explained by genetic drift and low gene flow.
JOURNAL OF APPLIED ENTOMOLOGY
(2022)
Article
Evolutionary Biology
Tyler J. Raszick, C. Michael Dickens, Lindsey C. Perkin, Ashley E. Tessnow, Charles P. -C. Suh, Raul Ruiz-Arce, Theodore N. Boratynski, Marcelo R. Falco, J. Spencer Johnston, Gregory A. Sword
Summary: This study used a high-throughput sequencing approach to investigate the population genomic structure of the boll weevil in the southern United States, northern Mexico, and Argentina, revealing two main lineages with sub-structuring. The geographic structure of the populations was consistent with the isolation by distance model, suggesting that geographic distance plays a key role in driving divergence in this species. The boll weevil populations from Argentina were found to be more closely related to the eastern lineage, indicating a recent colonization of South America by this lineage, but further sampling across Mexico, Central America, and South America is needed for clarification. Additionally, an instance of population turnover or replacement was uncovered, indicating temporal instability of the population structure.
EVOLUTIONARY APPLICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Daniel D. N. Vasquez, Daniele H. Pinheiro, Lays A. Teixeira, Clidia E. Moreira-Pinto, Leonardo L. P. Macedo, Alvaro L. O. Salles-Filho, Maria C. M. Silva, Isabela T. Lourenco-Tessutti, Carolina V. Morgante, Luciano P. Silva, Maria F. Grossi-de-Sa
Summary: This study investigated the potential of nanoparticles as a dsRNA carrier system to improve RNAi efficiency in cotton boll weevil (CBW). It was found that polyethylenimine (PEI) nanoparticles significantly increased gene silencing, while chitosan-tripolyphosphate (CS-TPP) nanoparticles did not effectively enhance RNAi efficiency.
FRONTIERS IN MOLECULAR BIOSCIENCES
(2023)
Article
Entomology
Thiele da Silva Carvalho, Carlos Alberto Domingues da Silva, Celso Feitosa Martins, Laryssa Lemos da Silva, Jose Cola Zanuncio, Jose Eduardo Serrao
Summary: The main cotton pest in the Americas is the cotton boll weevil. Reproductive diapause can be induced in these weevils when they feed on alternative diets. This study found that prolonged feeding on alternative diets affects the reproductive tract of female and old male weevils differently, and these individuals may not be able to reverse the atrophy of their reproductive organs even after accessing cotton squares.
Article
Agriculture, Multidisciplinary
Chenghai Yang, Charles P. -C. Suh
Summary: Early identification of cotton fields is crucial for boll weevil eradication programs. This study proposes a field-level classification method using field boundary data and early-season Sentinel-2 imagery. Machine learning classifiers and dimensionality reduction techniques are used to effectively identify cotton fields.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2023)
Review
Agronomy
Irish Lorraine B. Pabuayon, Brendan R. Kelly, Donna Mitchell-McCallister, Cade L. Coldren, Glen L. Ritchie
Summary: This paper discusses the environmental factors affecting boll production and distribution, reviews methods of measuring and analyzing boll distribution, and discusses the comparative advantages and drawbacks of these methods. By combining the positive elements in the different studies, significant progress can still be made in the area of boll distribution measurement.
Article
Virology
Leonardo Assis da Silva, Marcos Fernando Basso, Bergmann Morais Ribeiro
Summary: The cotton boll weevil is a major pest of cotton, causing significant losses in yield and fiber quality. In this study, a new virus, named Anthonomus grandis iflavirus 1 (AgIV-1), was discovered in apparently healthy native adult cotton boll weevils using a metagenomic approach. The complete genome sequence of AgIV-1 was obtained, and it could potentially be used for developing control tools for cotton boll weevils.
ARCHIVES OF VIROLOGY
(2023)
Proceedings Paper
Computer Science, Theory & Methods
Raul Toscano-Miranda, William Hoyos, Manuel Caro, Jose Aguilar, Anibal Trebilcok, Mauricio Toro
Summary: This paper compares five machine-learning models to classify the population of the boll weevil in cotton into three classes based on weather data. The results show that XGBoost obtains the highest accuracy of 88%, indicating the feasibility of using weather data for pest classification.
2022 XVLIII LATIN AMERICAN COMPUTER CONFERENCE (CLEI 2022)
(2022)
Article
Agronomy
Guilherme G. Rolim, Roberta R. Coelho, Jose D. Antonino, Lucas S. Arruda, Alice S. Rodrigues, Eduardo M. Barros, Jorge B. Torres
Summary: Insecticide resistance in arthropods, especially boll weevils, is a major cause of control failure. This study in Brazil found that boll weevils have high levels of resistance to beta-cyfluthrin through a kdr mutation mechanism. Caution is advised against further use of beta-cyfluthrin due to potential resistance, and monitoring studies are recommended to determine the extent of pyrethroid resistance in boll weevil populations.
PEST MANAGEMENT SCIENCE
(2021)
Article
Agronomy
Minzhi Chen, Yali Zhang, Fubin Liang, Jiyuan Tang, Pengcheng Ma, Jingshan Tian, Chuangdao Jiang, Wangfeng Zhang
Summary: High planting density can increase total boll number per unit ground area, thus boosting cotton yield, while maintaining stable single boll weight. The main-stem leaf plays a crucial role in sustaining photosynthesis of the boll-leaf system, and photosynthetic performance in sympodial leaves can be adjusted to enhance overall photosynthesis of the system.
EUROPEAN JOURNAL OF AGRONOMY
(2021)
Article
Agriculture, Multidisciplinary
Bruna Lais Nascimento Alves, Carlos Alberto Domingues da Silva, Jose Eduardo Serrao, Jose Cola Zanuncio
Summary: This study aimed to evaluate cotton cultivars based on their compensatory increase in response to boll weevil damage, finding that the TMG81WS cultivar exhibited greater compensatory growth after removal at 50 and 70 days after emergence. These findings could aid in the selection of cultivars tolerant to boll weevil damage.