Variabilité des descripteurs pluviométriques intrasaisonniers à impact agricole dans le bassin cotonnier de Côte d’Ivoire : cas des zones de Boundiali, Korhogo et Ouangolodougou

Dekoula, Charles Sékpa; Kouamé, B.; Ngoran, K.; Ehounou, Jean-Noël; Yao, Guy Fernand; Kassin, Koffi Emmanuel; Kouakou, J.B.; N'Guessan, Angelo Evariste Badou; Soro, Nagnin

doi:10.4314/jab.v130i1.7

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…The same results have been observed in recent publications on jassid and whiteflies [11,5] . The contrasting spatiotemporal evolution of rainfall in the cotton production area resulting from climate change [3] could partly explain this disparity between the North-East, North-West and South. The beginning of the rainy season is later in the Northeast and the end of the saiaon is earlier.…”

Section: Discussionmentioning

confidence: 99%

“…Firstly, there is the reduction of land and declining soil fertility. Secondly, climate change, through the variability of rainfall, has a negative effect, resulting in: disruption of the cropping season [3][4] , unsuitability of cotton varieties and modification of the spatiotemporal dynamics of pest and disease [11] . Cotton fields face attacks from many arthropod pests.…”

Section: Introductionmentioning

confidence: 99%

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New subdivision of cotton production area of Côte d’Ivoire based on the infestation of main arthropod pests

Kouakou¹,

Norbert²,

Mamadou³

et al. 2021

J. Entomol. Zool. Stud.

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Variations in populations of arthropod pests, under the influence of climate change, compromise the effectiveness of the cotton phytosanitary protection strategy in Côte d'Ivoire. This study aims to establish a new classification of cotton production areas, on the basis of predominant pests. A monitoring was therefore carried out from 2016 to 2019 in 400 farmers' fields. In these fields, surveys were conducted weekly, from the 30th to the 122nd day after emergence. Data analysis, through Principal Component Analysis, identified four groups of localities. The first group includes the northeastern localities (4°W to 5°W: 8°N to 10.5°N) such as Kong, Ouangolodougou, Sordi, Tiékpè, Kaouara. This area is characterized by high infestations of most pests (jassid, white flies, exocarpic lepidoptera, endocarpic lepidoptera, phyllophagous lepidoptera and mites). The second group is intermediate between northeast and central (5.5°W to 6.2°W: 8.3°N to 10.5°N). This area is characterized by infestations of jassid, white flies and exocarpic lepidoptera (H. armigera and D. watersi). It remains less infested by endocarpic lepidoptera (T. leucotreta and P. gossypiella). The third area is located in the South (4.5°W to 8.5°W: 6°N to 8.5°N). It is essentially infested by endocarpic lepidoptera T. leucotreta and P. gossypiella. Jassid and whitefly infestations are less important in this part, compared to the northern part. The fourth and last area extends from the center to the west (6°W to 8°W: 8°N to 10.5°N). Pest infestations are lower in this area compared to other areas.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New subdivision of cotton production area of Côte d’Ivoire based on the infestation of main arthropod pests

Kouakou¹,

Norbert²,

Mamadou³

et al. 2021

J. Entomol. Zool. Stud.

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“…The choice of this specific area of Côte d'Ivoire is based on the fact that climate forecasts indicate that it is very vulnerable to climate variability, particularly because of some of its biophysical and socio-economic characteristics. First, rainfall in this unimodal area, ranging from 400 mm to 1200 mm per year, is a limiting factor for agriculture [36] more exacerbated than elsewhere in the country. Secondly, it is subject to the continental influence of the harmattan (hot and dry wind) [37] and is marked by a water deficit greater than 500 mm due to a higher evapotranspiration (ETP) [25].…”

Section: Description Of the Study Sitesmentioning

confidence: 99%

“…Rainfall and temperature were investigated as they are recognized as the most important variables in climate science and hydrology and are frequently used to determine the extent and magnitude of climate change and variability [34]. In addition, their trends and variability are frequently mentioned as factors explaining various socio-economic problems such as food insecurity in countries where the economy is highly dependent on rain-fed agriculture [35,36]. Therefore, the analysis of changes in these meteorological variables coupled with the reactions of farmers is very crucial in order to provide policymakers and practitioners with information that would help in making accurate decisions beneficial for the sustainability of the environment and the welfare of farmers.…”

Section: Introductionmentioning

confidence: 99%

Climate Variability in the Sudanian Zone of Côte d’Ivoire: Weather Observations, Perceptions, and Adaptation Strategies of Farmers

et al. 2022

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Located in the extreme north of Côte d’Ivoire, the Sudanian zone is an area where 95% of the population depends on agricultural activities, particularly rain-fed agriculture. Given the serious threats that climate variability poses to food security and household incomes, it is important to understand the evolution of climate variables and their impacts on crops, perceptions, and adaptation measures taken by farmers. To do this, various statistical analyses were conducted using rainfall and temperature data from 1987 to 2018. These analyses were coupled with a survey of 287 farmers. The results showed a strong variability of precipitation marked by the succession of deficit and surplus periods with a return to wetter conditions since 2008. At the same time, an increase in temperature was observed. These phenomena have been perceived by farmers. Thus, to cope with the adverse effects of climate variability, farmers have developed numerous adaptation strategies that include the use of organic manure, agroforestry, changing planting dates, and introducing new crops, notably cashews.

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Assessment of soil fertility status in cotton-based cropping systems in Cote d’Ivoire

Koné

Kouadio

et al. 2022

Front. Soil Sci.

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Cotton is the main cash crop in northern Côte d’Ivoire, where intensive cultivation along with low external inputs has led to a decline in crop yields due to soil degradation. The present study aims to assess the evolution of soil fertility during the 2013 and 2021 periods in the cotton basin area of Côte d’Ivoire. More specifically, the study (i) identified the limiting physico-chemical parameters of soil fertility, and (ii) analysed the state of evolution of soil fertility in 2013 and 2021 in the cotton basin of Côte d’Ivoire. For this purpose, a total of 64 soil samples were taken in 2013 and in 2021 on the same cotton plots on the 0-20 cm horizon. Chemical analyses of the soil samples in the laboratory were carried out on the following parameters: particle size distribution, pH water, total nitrogen (NT), Potassium (K+), Calcium (Ca2+), Magnesium (Mg2+), Sodium (Na+) and Cation exchange capacity (CEC). The results of the soil analyses showed that the sandy-clay textured topsoils dominate the whole study area in both years. This leads to a low retention capacity of exchangeable bases. Determination of the soil pH showed that the pH varies from slightly acidic to neutral (6.5<pH<7). The most limiting chemical properties are Cation exchange capacity (CEC) and the sum of the exchangeable bases (SEB) in the department of Korogho, Boundiali, and Ferkessedougou and the most limiting chemical properties in the department of Mankono are CEC. However, during the period from 2013 to 2021 the content of exchangeable cations (Ca2+, Mg2+ and K+) and the base saturation (BS) increased significantly in all the departments, more precisely in the department of Mankono. Although we observed a slight increase in the chemical properties of the soils in 2021 compared to 2013, the values were still below the minimum required threshold. This result implies that the soils have poor physico-chemical properties and consequently a low level of fertility, which compromises the sustainability of the cotton production system. The application of organic and mineral amendments is therefore essential to increase the nutrient content of these soils.

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Variabilité des descripteurs pluviométriques intrasaisonniers à impact agricole dans le bassin cotonnier de Côte d’Ivoire : cas des zones de Boundiali, Korhogo et Ouangolodougou

Cited by 5 publications

References 13 publications

New subdivision of cotton production area of Côte d’Ivoire based on the infestation of main arthropod pests

New subdivision of cotton production area of Côte d’Ivoire based on the infestation of main arthropod pests

Climate Variability in the Sudanian Zone of Côte d’Ivoire: Weather Observations, Perceptions, and Adaptation Strategies of Farmers

Assessment of soil fertility status in cotton-based cropping systems in Cote d’Ivoire

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