Cristina Schetino Bastos

Scopus Publications

Off-Season Diet and Ecology of the Boll Weevil Influence Long-Term Malathion Susceptibility
Karolayne L. Campos, Guilherme G. Rolim, Raquel S. Silva, Maria R. S. Soares, Cristina S. Bastos, Jorge B. Torres
Insects, 2026
Background: The cotton boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), is a major pest of cotton that causes significant yield losses and costly control measures. As a cotton-specialized species, its population dynamics are heavily influenced by environmental conditions and management practices during the off-season. This study examined the effects of off-season food sources on adult survival, reproductive capacity, and susceptibility to malathion in the last generation before the off-season and in the generation entering the next planting season. Methods: Females were fed diets representing off-season conditions (cotton terminals and pollen) and the standard diet (flower buds), and then evaluated for survival, copulation, sperm viability, and egg production. Concentration–mortality bioassays determined malathion susceptibility before and after the off-season. Results: Female survival was lowest in those fed cotton terminals, while pollen and flower buds supported higher survival rates. The likelihood of copulation and sperm viability remained similar among diets after 60 days, or up to 100 days in surviving females; however, females fed flower buds had more eggs in their oviducts. Females that mated early maintained viable sperm up to the end of the 100-day assessment period. Populations collected after the off-season were more susceptible to malathion than those collected at the end of the growing season. Conclusions: Food restrictions and reduced malathion exposure during the off-season may contribute to a reversion toward boll weevils’ susceptibility to malathion. Overall, the findings highlight the importance of the fallow period and proper management of residual off-season populations for effective long-term boll weevil control, confirming malathion’s continued viability as a management tool.
Artificial neural network model for predicting population dynamics of Anthonomus grandis grandis (Coleoptera: Curculionidae) in cotton fields, as a function of climatic elements
Andréa Aparecida Santos Oliveira, Cristina Schetino Bastos, Jhersyka da Silva Paes, Leticia Caroline da Silva Sant’Ana, Tamíris Alves de Araújo, Ana Caroline Alves de Araújo, Apurba Barman, Marcelo Coutinho Picanço
Theoretical and Applied Climatology, 2026
The cotton boll weevil Anthonomus grandis grandis Boh. (Coleoptera: Curculionidae) is a destructive pest of cotton and can cause losses of up to 100%. Understanding and predicting the seasonal dynamics of pests makes it possible to plan sampling and apply control methods more efficiently. Artificial neural networks (ANNs) are machine learning tools with high predictive power. Therefore, this work aimed to determine a prediction model for the seasonal dynamics of A. grandis grandis in cotton crops using ANN. We used pest density data obtained in fields located in Brazil that were collected for five years. 1716 ANN were determined. The selected ANN used meteorological data from 20 days before evaluating the pest density, six neurons in the hidden layer, logistic activation function and Rprop learning algorithm. ANN predictions showed a high correlation (Pearson correlation = 0.865) with crop pest densities. Among the ANN predictors, the duration of the reproductive stage, air temperature and rainfall had positive effects on pest density. The opposite occurred with relative air humidity. Thus, the ANN determined in this work is promising to be used to predict the seasonal dynamics of A. grandis grandis.
Reproductive Status of Boll Weevils During Season and Off-Season of Cotton in the Cerrado of Brazil
Karolayne Lopes Campos, Guilherme Gomes Rolim, Raquel Sales Silva, Maria Raquel Sousa Soares, Cristina Schetino Bastos, Jorge Braz Torres
Entomologia Experimentalis Et Applicata, 2026
The boll weevil, Anthonomus grandis grandis Boh., presents significant management challenges due to its persistent presence and prolonged cropping season. One hypothesis posits that favorable factors, such as host availability and climatic suitability, contribute to the ongoing reproductive populations throughout the agricultural year. This research assessed the reproductive status of weevils during both the cotton‐growing and off‐seasons, with a focus on adult populations and the reproductive condition of females. Monitoring occurred over two agricultural years in commercial fields. We performed weekly recordings, identifying weevils based on sex and evaluating the reproductive status of females, particularly concerning mating status, sperm viability, and egg development. A total of 94 180 weevils were collected, and the average weekly capture per trap during the cropping season was comparable to that of the off‐season. The percentage of females collected during the growing season was approximately 20% higher than that in the off‐season; however, the percentage of copulated females collected off‐season exceeded that of females collected during the growing season in both years. The spermatozoa in these females demonstrated comparable viability across both periods, with values ranging from 72.6% to 95.9% annually. The presence of different stages of egg development in the reproductive system suggests that females could be engaged in oviposition activities during both the growing and off‐season periods. The findings suggest that a substantial percentage of females continue to be active during the off‐season in the Cerrado from the last generation growing season or emerging in the off‐season from spontaneous cotton plants. The findings indicate that females detect cotton plants for oviposition during this timeframe. Contrary to expectations, the fallow period does not significantly affect the suppression of the weevil population.
Grain traits and ozone exposure shape maize resistance to Sitophilus zeamais
Ianne Lara O. de Meireles, Ana Caroline A. de Araújo, Catiane O. Souza, Fábio André G. S. Cavalcanti, Ernandes R. de Alencar, Jorge B. Torres, Raul Narciso C. Guedes, Cristina S. Bastos
Scientific Reports, 2025
Maize plays a pivotal role in global food security, but post-harvest losses due to storage pests, particularly the maize weevil (Sitophilus zeamais), remain a significant challenge. This study evaluated resistance in 15 maize genotypes, including sweet corn, popcorn, and non-transgenic and transgenic varieties, while exploring the potential for synergistic effects of ozone treatment (direct or residual) in enhancing host plant resistance. Choice and no-choice trials were conducted to identify resistant genotypes, and resistance causes were analyzed in relation to grain chemical composition, color characteristics, and dimensions. Three genotypes representing varying resistance levels (susceptible, moderately and highly resistant) were tested for their response to ozone exposure. Among the tested genotypes, BAS 5802 (popcorn), 30s31 (non-Bt), 30s31VYHR (Bt), KWX 1002-1008 (non-Bt), and KWX 1010 (non-Bt) showed higher resistance in choice trials, while KWX 1005, 1007, 1010, 30s31, and 30s31VYHR were most resistant in no-choice trials. Combining ozone treatment with intermediate or highly resistant genotypes enhanced protection against S. zeamais. Increased grain color saturation and carbohydrate content contributed to resistance, whereas higher lipid and ash content correlated with increased susceptibility. These findings highlight the potential for integrating host plant resistance with ozone treatment as an innovative strategy for sustainable pest management.
Direct defense of Solanum lycopersicum L. to Tetranychus urticae Koch (Acari: Tetranychidae) mediated by plant morphological and chemical traits
Rafaela Montagna Terenciano, Thyago Lima da Silva, Cristina Schetino Bastos, Flávio Lemes Fernandes, Jaqueline Pereira Dias, Maria Elisa de Sena Fernandes
Arthropod Plant Interactions, 2025
Boll weevils in dry bolls: is there a performance disadvantage?
Beatriz S. Coelho, Suzany A. Leite, Mateus P. dos Santos, Eloito C. de Mates, Beatriz M. L. de Moraes, Cristina S. Bastos, Raul N. C. Guedes, Aldenise A. Moreira, Maria A. Castellani
Journal of Cotton Research, 2024
Background Anthonomus grandis grandis is the main cotton pest in the Americas, with the potential to become a pest in other continents. The insect uses the plant’s reproductive organs for feeding, oviposition, and survival strategies in the off-season, sheltering in dry bolls. This study aimed to know the reproductive potential, feeding, longevity, and morphometric characteristics of boll weevils from dry bolls, squares, and traps. Adults were obtained from infested squares, dry bolls, and traps installed in cotton fields and the Caatinga area. Thirty weevil pairs were maintained in the laboratory to assess the oviposition, feeding holes, longevity, and morphometric measurements of the parental and F1 generations. Results In the parental generation, boll weevils from traps (the Caatinga area and cotton cultivation) showed greater reproductive potential. Boll weevils from squares and the Caatinga area showed greater feeding activity compared with those from cotton cultivation. Greater rostrum length, thorax + abdomen length, and abdomen width were observed in boll weevils from cotton cultivation and dry bolls. The origin of boll weevils parental generation did not affect progeny emergence time. The F1 generation of boll weevils showed significant differences in average longevity depending on the origin of different microhabitats. Furthermore, differences in rostrum lengths were observed, with the boll weevils coming from traps installed in cotton cultivation, the Caatinga area, and dry bolls being the largest. Regarding thorax + abdomen length and abdomen width, the highest values were observed in those from the Caatinga area and cotton cultivation. Conclusion It was proven that dry bolls did not affect the reproductive, feeding, and longevity performance of boll weevils, enabling better insect fitness (reproduction and size) in relation to those coming from squares. The use of dry bolls as off-season shelter is an important survival strategy for the boll weevil.
Sweet corn genotypes and ear insect infestations cultivated under different weed management regimes
Marcos V. Zanon, Ana C. A. Araújo, Ana P. Perotto, Patrícia J. Santos, Fábio A. Suinaga, Jorge B. Torres, Cristina S. Bastos
Arthropod Plant Interactions, 2024
Infestation of Anthonomus grandis grandis (Coleoptera: Curculionidae) contributes to forming shelter structures in cotton plants
Willian S. do Vale, Laélcio N. Ribeiro Filho, Iuri dos Santos, Benício de M. Santos Neto, Lilian R. Araújo, Henrique J. C. Santana, Thainara F. G. da Silva, Cristina S. Bastos, Carlos A. D. da Silva, José C. Zanuncio, Suzany A. Leite, Maria A. Castellani
Journal of Applied Entomology, 2024
Herbivorous arthropods can induce their host to form structures where they shelter during unfavourable periods. The boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), can spend the off‐season inside cotton plant structures, known as dry bolls, protected from pesticides, natural enemies and heat and desiccation on the soil surface, thereby increasing its survival and preserving its reproductive capacity. However, the relationship between the boll weevil and dry boll formation is not fully understood and requires further study. The formation and external and internal characteristics of dry bolls on cotton plants infested with different densities of boll weevils, and the emergence and survival of this insect from these structures, were evaluated. Compared with non‐infested control plants, plants infested with boll weevil formed almost twice as many dry bolls, which were 2.3 times heavier and with a diameter 1.7 times larger than those on non‐infested plants. Boll weevil infestation reduces the number of bolls and commercial mass of fibre + seeds, reducing productivity and increasing cotton harvest contaminants. However, dry bolls on non‐infested plants demonstrate that other factors are involved in their formation.
Cotton harvest aid products can favour the formation of structures that protect Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae) from insecticide application
Willian Santos do Vale, Beatriz M. L. de Moraes, Iuri dos Santos, Beatriz S. Coelho, Ana Carolina P. Cardoso, Benício de M. Santos Neto, Lilian R. Araújo, Cristina S. Bastos, Carlos A. Domingues da Silva, Maria Aparecida Castellani
Agricultural and Forest Entomology, 2024
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.
First report of feeding injury of Proba fraudulenta Stäl (Hemiptera: Miridae) to Cynara cardunculus (L.) Fiori (Asterales: Asteraceae) in Brazil
Maria Luiza Mimbú Osako, Paulo Sergio Fiuza Ferreira, Luciano Santana Fiuza Ferreira, Guilherme Rodrigues Tomé, Flávio Gabriel Bianchini, Arthur Vieira Ribeiro, Cristina Schetino Bastos, Ricardo Siqueira da Silva, Tamíris Alves de Araújo
Crop Protection, 2024
Associational Resistance Using Wild and Commercial Tomato Genotypes Employed in the Management of Tomato Virus Vectors
Donald Manigat, Karolayne L. Campos, Joyce S. dos Santos, Catiane O. Souza, Jorge B. Torres, Fábio A. Suinaga, Cristina S. Bastos
Agriculture Switzerland, 2024
Risk of control failure to insecticides malathion, profenophos + cypermethrin mixture, and fipronil in boll weevil (Coleoptera: Curculionidae) populations from Bahia, Brazil
Beatriz S. Coelho, Suzany A. Leite, Mateus P. dos Santos, Raul N. C. Guedes, Cristina S. Bastos, Aldenise A. Moreira, João E. V. Bonfim, Maria A. Castellani
Journal of Cotton Research, 2023
Systemic insecticides in cotton plants: seed treatment, protection against early-season sucking insects, and their ecological selectivity with predatory insects of different feeding habits
Karolayne Lopes Campos, Cristina Schetino Bastos, Richard V. Sequeira, Jorge Braz Torres
Arthropod Plant Interactions, 2023
Planting Date of Cotton in the Brazilian Cerrado Drives Boll Weevil (Coleoptera: Curculionidae) Infestation
Patrícia J. Santos, Antônio M. Dias, Karolayne L. Campos, Ana C. A. Araújo, Andréa A. S. Oliveira, Fábio A. Suinaga, Jorge B. Torres, Cristina S. Bastos
Insects, 2023
Where and How to Sample Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) in Solanum tuberosum
Flávia M. Alves, Alfredo H. R. Gonring, Maria E. de S. Fernandes, Cristina S. Bastos, Flávio Lemes Fernandes
Potato Research, 2022
Spatio-temporal distribution of Anthonomus grandis grandis Boh. in tropical cotton fields
Andréa A. S. Oliveira, Tamíris A. Araújo, Allan T. Showler, Ana C. A. Araújo, Igor S. Almeida, Renata S. A. Aguiar, José E. Miranda, Flávio L. Fernandes, Cristina S. Bastos
Pest Management Science, 2022
Arthropod food webs associated with cotton: Does Bt cotton mediate community stress?
Carlos Eduardo Almeida Luz, Vitor Zuim, Andréa Aparecida Santos Oliveira, Patrícia de Jesus dos Santos, Karolayne Lopes Campos, Marcelo Mendes Haro, Lúcia Madalena Vivan, Cristina Schetino Bastos, Raul Narciso Carvalho Guedes
Journal of Applied Entomology, 2022
Physiological Quality of Corn Seeds Treated with Gaseous Ozone
Caio César Rosa, Ernandes Rodrigues De Alencar, Nara Oliveira Silva Souza, Cristina Schetino Bastos, Fábio Akiyoshi Suinaga, Wallas Felippe De Souza Ferreira
Ozone Science and Engineering, 2022
Cotton row spacing for boll weevil management in low-input production systems
Elcio Antonio Paim, Antônio Macedo Dias, Allan T. Showler, Karolayne Lopes Campos, Andréa Aparecida Santos Oliveira, Pedro Paulo Castro Grillo, Cristina Schetino Bastos
Crop Protection, 2021
Economic injury levels and economic thresholds for Diceraeus (Dichelops) melacanthus (Hemiptera: Pentatomidae) in vegetative maize
Paulo R. da Silva, Ademar Novais Istchuk, Josemar Foresti, Thomas E. Hunt, Tamíris Alves de Araújo, Flávio Lemes Fernandes, Ernandes Rodrigues de Alencar, Cristina Schetino Bastos
Crop Protection, 2021
Spatial distribution and colonization pattern of Bemisia tabaci in tropical tomato crops
Arthur V Ribeiro, Rodrigo S Ramos, Tamíris A de Araújo, João RS Soares, Jhersyka da S Paes, Vitor CR de Araújo, Cristina S Bastos, Robert L Koch, Marcelo C Picanço
Pest Management Science, 2021
Development and validation of sampling plans for Frankliniella schultzei on tomato
Tamíris A. de Araújo, Daniela T. Pezzini, Rodrigo S. Ramos, Marcelo C. Picanço, Cristina S. Bastos, Thomas E. Hunt, William D. Hutchison
Crop Protection, 2020
Susceptibility of corn to stink bug (Dichelops melacanthus) and its management through seed treatment
Paulo Roberto da Silva, Ademar Novais Istchuk, Thomas E. Hunt, Cristina Schetino Bastos, Jorge Braz Torres, Karolayne Lopes Campos, Josemar Foresti
Australian Journal of Crop Science, 2019
Insecticide resistance and control failure likelihood among populations of the boll weevil (Anthonomus grandis) from mato grosso (brazil)
Sharrine Omari Domingues Oliveira-Marra, Raul Narciso Carvalho Guedes, Cristina Schetino Bastos, Pedro Henrique Alves Marra, Lucia Madalena Vivan, Anderson de Moura Zanine
Acta Scientiarum Agronomy, 2019
Standardized sampling plan for Aphis gossypii based on the cotton cultivar, plant phenology and crop size
Tamíris A. Araújo, Lúcia Helena A. Araújo, Nilson R. Silva, Carlos Eduardo A. Luz, Ézio M. da Silva, Márcio D. Moreira, Fábio A. Suinaga, Marcelo C. Picanço, Cristina S. Bastos
Journal of Applied Entomology, 2019
Economic injury levels and economic thresholds for Leptoglossus zonatus (Dallas) (Hemiptera: Coreidae) infesting seed maize
Josemar Foresti, Cristina S Bastos, Flávio L Fernandes, Paulo R da Silva
Pest Management Science, 2018
A RAPD-PCR-based genetic diversity analysis of helicoverpa armigera and H. Zea populations in Brazil
H M Lopes, C S Bastos, L S Boiteux, J Foresti, F A Suinaga
Genetics and Molecular Research, 2017
Toxicity of botanical and synthetic formulations to the maize weevil, Sitophilus zeamais (Coleoptera: Curculionidae)
Arthur Vieira Ribeiro, Carlos Eduardo Almeida Luz, Cristina Schetino Bastos, Yann Schmidt Teichmann Krieger, Nathalia Henriques Da Silva, Weslley Brandão Da Silva
Revista Colombiana De Entomologia, 2017
Development of cotton pests exhibiting different feeding strategy on water-stressed and kaolin-treated cotton plants
Luziani R. Bestete, Jorge B. Torres, Rebecca B. B. Silva, Christian S. A. Silva-Torres, Cristina S. Bastos
Journal of Pest Science, 2017
Resistance of important bean genotypes to the Mexican bean beetle [Zabrotes subfasciatus (Bohemann)] during storage and its control with chemical synthetic and botanical insecticides
Departamento de Entomologia (DDE), Universidade Federal de Viçosa (UFV), Campus Universitário s/no., 36570-000, Viçosa, MG, Brazil, Carlos E.A. Luz, Tamíris A. Araujo, Departamento de Entomologia (DDE), Universidade Federal de Viçosa (UFV), Campus Universitário s/no., 36570-000, Viçosa, MG, Brazil, Arthur V. Ribeiro, Departamento de Entomologia (DDE), Universidade Federal de Viçosa (UFV), Campus Universitário s/no., 36570-000, Viçosa, MG, Brazil, Cristina S. Bastos, Universidade de Brasília (UnB), Faculdade de Agronomia e Medicina Veterinária (FAV), Instituto Central de Ciências Ala Sul (ICC-SUL), Campus Darcy Ribeiro, 70910-900, Asa Norte, Brasilia, DF, Brazil, Jorge B. Torres, Universidade Federal Rural do Pernambuco (UFRPE), Departamento de Agronomia-Entomologia (DEPA), 52171-900, Dois Irmãos, Recife, PE, Brazil, Yann S.T. Krieger, Universidade Federal Rural do Pernambuco (UFRPE), Departamento de Agronomia-Entomologia (DEPA), 52171-900, Dois Irmãos, Recife, PE, Brazil
Australian Journal of Crop Science, 2017
Susceptibility of bemisia tabaci biotype B to insecticides
Danilo AS Esashika, Miguel Michereff-Filho, Cristina S Bastos, Alice K Inoue-Nagata, Antônio M Dias, Matheus GPM Ribeiro
Horticultura Brasileira, 2016
Rational practices to manage boll weevils colonization and population growth on family farms in the Semiárido region of Brazil
Robério Neves, Felipe Colares, Jorge Torres, Roberta Santos, Cristina Bastos
Insects, 2014
Reducing boll weevil populations by clipping terminal buds and removing abscised fruiting bodies
Robério C.S. Neves, Allan T. Showler, Ézio S. Pinto, Cristina S. Bastos, Jorge B. Torres
Entomologia Experimentalis Et Applicata, 2013
The lesser cotton leafworm, Anomis impasta (Guenée) (Lepidoptera, Noctuidae), in cotton
Revista Brasileira De Entomologia, 2012
Economic injury level for the coffee berry borer (Coleoptera: Curculionidae: Scolytinae) using Attractive traps in Brazilian coffee fields
F. L. Fernandes, M. C. PicanÇo, S. O. Campos, C. S. Bastos, M. Chediak, R.N.C. Guedes, R. S. Da Silva
Journal of Economic Entomology, 2011
Grasshopper injury to potato: Consumption, effect on photosynthesis, and economic injury level
Cristina Bastos, Sean D. Whipple, W. Wyatt Hoback, Leon G. Higley
Agronomy Journal, 2011
Parasitism of cotton leafworm Alabama argillacea eggs by Trichogramma pretiosum in commercial cotton fields
C. S. Bastos, J. B. Torres, F. A. Suinaga
Journal of Applied Entomology, 2010
Second generation European corn borer injury and Irish potato physiology, yield, and quality
Jesse R. Ziems, W. Wyatt Hoback, Leon G. Higley, Thomas E. Hunt, Odair A. Fernandes, Cristina Bastos, Adeney de Freitas Bueno
Agronomy Journal, 2008
Development and population growth of Alabama argillacea on cotton of white and colored fibers
Roberta Leme dos Santos, Jorge Braz Torres, Cristina Schettino Bastos
Pesquisa Agropecuaria Brasileira, 2008
Occurrence of Planococcus minor Maskell (Hemiptera: Pseudococcidae) in cotton fields of northeast region of Brazil
Cristina S. Bastos, Raul P. de Almeida, Francisco das C. Vidal Neto, Gildo P. de Araújo
Neotropical Entomology, 2007
Nutrient content affecting Spodoptera frugiperda and Dalbulus maidis occurrence in corn
CRISTINA SCHETINO BASTOS, JOÃO CARLOS CARDOSO GALVÃO, MARCELO COUTINHO PICANÇO, PAULO ROBERTO GOMES PEREIRA, PAULO ROBERTO CECON
Insect Science, 2007
Selectivity of pesticides used on cotton (Gossypium hirsutum) to Trichogramma pretiosum reared on two laboratory-reared hosts
Cristina S Bastos, Raul P de Almeida, Fábio A Suinaga
Pest Management Science, 2006
Photosynthetic Responses of Soybean to Soybean Aphid (Homoptera: Aphididae) Injury
T. B. Macedo, C. S. Bastos, L. G. Higley, K. R. Ostlie, S. Madhavan
Journal of Economic Entomology, 2003

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