Pest Management Science (2022) 78, 2492-2501
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 and Cristina S. Bastos (2022)
Spatio-temporal distribution of Anthonomus grandis grandis Boh. in tropical cotton fields
Pest Management Science 78 (6), 2492-2501
Abstract:
BACKGROUND
Knowledge of the spatio-temporal distribution of pests is important for the development of accurate management approaches. The boll weevil, Anthonomus grandis grandis Boh., is a deleterious cotton, Gossypium hirsutum L., pest in the western hemisphere. The spread of boll weevils across cotton fields remains poorly understood. We assessed the dispersal pattern of adult weevils through cotton fields cultivated in a tropical area during dry and wet seasons using geostatistics for the number of adults and infested reproductive structures (buds, bolls and total).
RESULTS
Adult weevils and infested reproductive structures increased across both seasons despite the prevailing climatic variables. In both seasons, boll weevil adults and infested reproductive structures followed an aggregated distribution. The distances over which samples maintained spatial dependence varied from 0.7 to 43.4 m in the dry season and from 6.0 to 614.4 m in the wet season. Boll weevil infestations started at field borders and the infested reproductive structures (oviposition and/or feeding punctured) were greater than the adults regardless of cotton growth stage.
CONCLUSION
Sampling for boll weevils in cotton fields should start at the field borders and focus on total infested reproductive structures (buds + bolls) and as cotton plants develop, sampling should focus on the field as a whole. Distances among samples will vary from 6 to 470 m. Thus, despite the cotton phenological stage or growing season, monitoring of boll weevil should be done by sampling total infested reproductive structures with a minimum distance of 6 m among samples.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Tamiris Araujo, Allan T. Showler, Cristina S. Bastos
Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
Pest and/or beneficial records:
Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
---|---|---|---|---|
Anthonomus grandis | Cotton (Gossypium) |