Soil carbon accumulation in cotton production systems in the Brazilian Cerrado

Ferreira, A. C. de B.; Borin, A. L. D. C.; Lamas, F. M.; Bogiani, Júlio César; Silva, Mellissa Ananias Soler da; Filho, J. L. da Silva; Staut, L. A.

doi:10.4025/actasciagron.v42i1.43039

Cited by 10 publications

(2 citation statements)

References 25 publications

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“…Brazil is one of the largest cotton producers in the world, with an estimated cultivated area of 1.1 million hectares (IBGE, 2020) mainly in the Cerrado Biome with rainfed conditions (Ferreira et al, 2020). However, this culture is expanding with areas irrigated, mainly small properties in the semi-arid region of the Northeast Brazil (Bezerra et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Mortality of the cotton boll weevil in drip and sprinkler irrigated cotton crops

et al. 2023

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The cotton boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), is a key cotton crop pest in Brazil. Adverse climatic factors, such as high temperatures and low soil moisture, dehydrate oviposited cotton squares (bud flowers) on the ground and cause high mortality of its offspring within these plant structures. The objective of this research was to evaluate the mortality of the cotton boll weevil in drip and sprinkler irrigated cotton crops. The experimental design was in randomized blocks with two treatments: drip (T1) and sprinkler (T2, control) irrigated cotton crops with sixteen replications. Each parcel had one emergence cage, installed between two cotton rows per irrigation system, with 37 cotton squares with opened oviposition punctures and yellowish bracts, to capture adult cotton boll weevils. The average number of boll weevils that emerged from the cotton squares and the causes of mortality at different development stages were determined per treatment. Third-generation life tables of the boll weevil were prepared using the natural mortality data in drip and sprinkler irrigation treatments and plus actual, apparent and indispensable mortality rates and the lethality of each mortality cause. We conclude that the application of water directly to the root zone of the plants in a targeted manner, using the drip irrigation system, can cause high mortality of the cotton boll weevil immature stages inside cotton squares fallen on the ground. This is because the cotton squares fallen on the drier and hotter soil between the rows of drip-irrigated cotton dehydrates causing the boll weevils to die. This is important because it can reduce its population density of the pest and, consequently, the number of applications of chemical insecticides for its control. Thus, contributing to increase the viability of cotton production, mainly in areas of the Brazilian semiarid region where the cotton is cultivated in organic system.

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Section: Introductionmentioning

confidence: 99%

Mortality of the cotton boll weevil in drip and sprinkler irrigated cotton crops

et al. 2023

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“…: Brachiaria) are the most important crops, with U. brizantha and U. ruziziensis being the most widely used species. These species can be cultivated either individually or in combination with maize (Ferreira et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

GROWTH AND DEVELOPMENT OF COTTON CULTIVATED AFTER Urochloa spp.

Asmus

Lamas

2023

Rev. Agric. Neotrop.

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No-tillage systems (NTSs) are generally known for their beneficial effects, whether on soil attributes or the yield of the target crop. For instance, research has explored the benefits of growing target crops, such as soybean or cotton, on soil previously occupied by a cover crop. However, fewer studies have investigated the potential negative implications of NTSs. Since, certain cover crops can release exudates harmful to other plants, there is a need to fill this knowledge gap. To this end, this study used four experiments to investigate the effects of two species of Urochloa on cotton germination, plant emergence, and biomass production. In the first two experiments, cotton germination was evaluated by placing seeds on paper rolls moistened with different concentrations of root washings of Urochloa plants cultivated for 45 days in tubes kept in a greenhouse, and desiccated with or without glyphosate. In the other two experiments, the emergence and biomass production of cotton were evaluated, which was sown in pots where two species of Urochloa were previously grown and subsequently desiccated or not with glyphosate, and managed in three ways: a) the entire plant of Urochloa spp. was kept in the pot (shoots and roots in the soil), b) only the aerial parts of Urochloa spp. were kept on the soil surface, and c) only the roots of Urochloa spp. were kept in the soil. Cotton seed germination was negatively affected by Urochloa spp. root washings. Both the emergence percentage and emergence speed index of the cotton plants were negatively affected when only the leaves of Urochloa spp. were kept in the soil with and without glyphosate desiccation. No adverse effect of the treatments (pre-cultivation and management of Urochloa spp.) on the production of cotton shoot and root biomass was observed.

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