Browsing by Author "Tryphone, George Muhamba"

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Characterization of the common bean host and Pseudocercospora griseola, the causative agent of angular leaf spot disease in Tanzania
(African Journal of Plant Science, 2016) Chilagane, Luseko Amos; Msolla, Susan Nchimbi; Kusolwa, Paul Mbogo; Porch, Timothy Gabriel; Diaz, Luz Miryam Serrato; Tryphone, George Muhamba
Angular leafspot (ALS), caused by the fungus, Pseudocercospora griseola, is one of the most important disease of common bean in Tanzania. Breeding for resistance to this disease is complicated by the variable nature of the pathogen. In Tanzania, a thorough analysis of the variability of this pathogen is lacking which limits breeding for durable resistance. This work aimed at characterizing P. griseola in relation to its host in Tanzania. A sample collection of both P. griseola and common bean was conducted in the 2013 and 2014 growing seasons from nine regions. Single spore isolation was performed for P. griseola isolates and DNA was extracted from both P. griseola mycelium and bean leaves from which the pathogen was collected. For characterization of the gene pool origin of the host, Phaseolin DNA marker was evaluated and for the pathogen, the Internal Transcribed Spacer region (ITS) and the Actin gene sequences were evaluated. Phylogenetic analysis showed the presence of 69.7% Andean and 30.3% Mesoamerican strains of P. griseola in Tanzania. The common bean host genotypes showed a similar distribution with 84.2% Andean and 15.8% Mesoamerican. In both cases, Andean strains of the pathogen and Andean bean genotypes outnumbered Mesoamerican. In relation to the common bean genotypes, Andean genotypes were more susceptible to ALS as compared to Mesoamerican genotypes. There were few strains that were of Andean origin but were pathogenic on Mesoamerican common bean genotypes, a group that has previously been termed Afro-Andean. Geographically, most of the regions of Tanzania had only Andean strains except for Kagera where 60% were Mesoamerican strains, and in Arusha and Tanga, where 50 and 33% were Mesoamerican, respectively. Only three regions, Kagera, Mbeya and Rukwa, were found to grow Mesoamerican beans. The findings of this study are important in setting basic objectives for breeding for angular leaf spot disease in Tanzania.
Development of multiple disease resistant common bean (phaseolus vulgaris L.) cultivars using marker assisted selection
(Sokoine University of Agriculture, 2014) Tryphone, George Muhamba
The work was undertaken to develop lines with multiple disease resistance incorporating ALS, BCMNV and CBB and characterization of resistance to ALS from bean landraces to improve yield of common bean in Tanzania. Single, double and three-way crosses were made between the susceptible recurrent parent, Kablanketi and resistant parents (Mexico 54, Vax 4 and MCM 5001). The Fa were screened for the presence of resistance markers through marker assisted selection using SNO2, SAP6 and ROC11 SCAR markers. Thirty five Fa lines had a combination of genes for ALS, CBB and BCMV while 11 had a combination of two genes for resistance which forms a good source for folia disease resistance in breeding programmes. Those lines making 120 plants were validated for the resistance by phenotyping with three pathogens (ALS, CBB and BCMV) in the screen house and 31 plants were found resistant to the three pathogens (P. griseola, Xap and BCMV). The performance of genotypes varied significantly for the disease reactions and yields. Yield varied from 484 to 3305 kgha'1 with a mean of 2042 kgha'1. The genotypes with combined resistance and high yields are recommended further for evaluation for release as a variety. Results also demonstrated that the heritability for disease in this study was moderate to higher indicating that the selection can be performed in early generation for some of the pathogens like ALS and BCMV traits. The study confirmed further that resistance of P. griseola is due to monogenic dominant gene for ALS and single recessive gene for BCMV. The CBB resistance was found to be conditioned by one major gene which had effects of partial resistance. The inheritance of ALS resistance in Beti-10, Nanka, Nanavala and Nkanamna landraces indicated that one single dominant gene controls the resistance. The heritability for ALS in the landraces was high indicating the additive genetic effect for that trait. SSR marker Pv-ag004 was found to be linked to resistance in Beti-10. This landrace can be used in pyramiding the ALS resistant genes iniii the farmers preferred varieties. However, detailed investigation is needed for the mechanisms of resistance of the four landraces.
Diversity of common bean (Phaseolus vulgaris L.) Genotypes in iron and zinc contents under screenhouse conditions
(2010) Tryphone, George Muhamba; Nchimbi-Msolla, Susan
Deficiencies in iron and zinc have health consequences for humans, such as anaemia, poor growth and development in children and low productivity in adults. To guarantee sufficient supply of iron and zinc through diet mainly consisting of staple foods, such as common bean (Phaseolus vulgaris L.), specific interventions in plant breeding are needed. However, seed mineral content has not been a selection criterion for plant breeding, although genetic variation for this trait is present in available germplasm collections. The aim of this study was to evaluate variability of iron and zinc concentrations among common bean genotypes grown in four major bean growing areas in Tanzania for breeding work. Ninety genotypes collected were evaluated under screen house at Sokoine University of Agriculture. A completely randomized design with three replications was used. Seeds and leaves were collected, dried, ground and the powder was used for iron and zinc determination using atomic absorption spectrophotometer. Variation in iron and zinc contents was observed among genotypes both in seeds and leaves and best genotypes identified. Results have shown a positive and significant correlation(r=o.416;P<0.001) between iron and zinc, suggesting that genetic factors for increasing iron and zinc are co-segregating with genetic factors for increasing zinc. Leaves of the studied varieties have moderate level of zinc (28.0 ppm) and high level of iron (310.0 ppm) forming good source of micronutrients in combating micronutrient malnutrition. Genotypes with high level of iron and zinc should be used as a gene source in future breeding work.
Effects of soil pH levels on iron and zinc concentrations of common bean (Phaseolus vulgaris L.) genotypes
(African Journal of Agricultural Research, 2024-07) Magomere, Kinguye Masamaki; Nchimbi-Msolla, Susan; Tryphone, George Muhamba
Plants grown in acid soils experience a variety of stresses which include aluminium, hydrogen and/or manganese toxicity, as well as nutrient deficiencies of calcium and magnesium. A study was carried out to determine the influence of soil pH levels on iron and zinc concentrations in leaves and seeds of twenty-five common bean genotypes. Plastic cups trial was carried out in the screen house to determine the actual amount of quick lime Ca(OH)2 required to reach a targeted soil pH level. In each pot, 4 kg soil was amended with Ca(OH)2 to obtain the target soil pH levels of 5.3, 5.5, 6.5 and 7.5. The experimental design followed a randomized complete block design in a split plot arrangement with three replications per treatment. The pH levels were treated as main factor and genotypes as sub plot. Data collected include leaf iron concentration, seed iron concentration, leaf zinc concentration, and seed zinc concentration and analysis of variance was performed for all data using GenStat statistical package 15th edition. The result demonstrated that soil pH affects absorption of micronutrients directly or indirectly by affecting the nutrients availability to common bean plants.
Effects of sowing dates and phosphorus levels on cotton growth and yield: soil analysis and implications
(Frontiers in Sustainable Food Systems, 2023-09-20) Tlatlaa, Jacob Shauri; Tryphone, George Muhamba; Nassary, Eliakira Kisetu
This study assessed the effects of sowing dates and phosphorus levels on cotton performance in Chato-Msilale village in Chato District, Tanzania. The soil analysis revealed that field exhibited slightly acidic soil with normal electrical conductivity but suffered from severe deficiencies in total nitrogen and organic carbon. The same field presents common issue of low cation exchange capacity, indicating limited nutrient-holding capacity. Furthermore, both fields displayed very low levels of total nitrogen (<0.1%), signaling a nitrogen deficiency. Available phosphorus was rated as medium (16.8 mg kg −1 soil). Trace elements fluctuated and could be managed based on specific crop requirements. The factors at different levels were: (1) sowing dates – (i) 25th November 2022, (ii) 15th December 2022, and (iii) 4th January 2023; and (2) Phosphorus levels – (i) control, (ii) 20 kg P ha −1 , (iii) 40 kg P ha −1 , and (iv) 60 kg P ha −1 . Regarding cotton growth and yield, sowing dates significantly (p < 0.001) influenced plant height, gin turnout, lint yield, number of bolls per plant, and boll weight while phosphorus levels did not exhibit significant effects. Earlier sowing dates resulted in higher yields, albeit with variations in yield components. Interactions showed that growth and yields were only numerically higher in the middle sowing date at higher levels of phosphorus applied. Overall, these insights offer valuable guidance for optimizing cotton cultivation in Chato District, emphasizing the importance of selecting appropriate sowing dates for improved yields.
Effects of sowing dates and phosphorus levels on cotton growth and yield: soil analysis and implications
(Frontiers in Sustainable Food Systems, 2023-11-20) Tlatlaa, Jacob Shauri; Tryphone, George Muhamba; Nassary, Eliakira Kisetu
This study assessed the effects of sowing dates and phosphorus levels on cotton performance in Chato-Msilale village in Chato District, Tanzania. The soil analysis revealed that field exhibited slightly acidic soil with normal electrical conductivity but suffered from severe deficiencies in total nitrogen and organic carbon. The same field presents common issue of low cation exchange capacity, indicating limited nutrient-holding capacity. Furthermore, both fields displayed very low levels of total nitrogen (<0.1%), signaling a nitrogen deficiency. Available phosphorus was rated as medium (16.8 mg kg−1 soil). Trace elements fluctuated and could be managed based on specific crop requirements. The factors at different levels were: (1) sowing dates – (i) 25th November 2022, (ii) 15th December 2022, and (iii) 4th January 2023; and (2) Phosphorus levels – (i) control, (ii) 20 kg P ha−1, (iii) 40 kg P ha−1, and (iv) 60 kg P ha−1. Regarding cotton growth and yield, sowing dates significantly (p < 0.001) influenced plant height, gin turnout, lint yield, number of bolls per plant, and boll weight while phosphorus levels did not exhibit significant effects. Earlier sowing dates resulted in higher yields, albeit with variations in yield components. Interactions showed that growth and yields were only numerically higher in the middle sowing date at higher levels of phosphorus applied. Overall, these insights offer valuable guidance for optimizing cotton cultivation in Chato District, emphasizing the importance of selecting appropriate sowing dates for improved yields.
Genetic characterization of angular leaf spot resistance in selected common bean landraces from Tanzania
(African Journal of Biotechnology, 2015-10-28) Tryphone, George Muhamba; Chilagane, Luseko Amos; Nchimbi-Msolla, Susan; Kusolwa, Paul Mbogo
Angular leaf spot disease (ALS) caused by Pseudocercospora griseola is one of the most important bean diseases in Tanzania. The bean landraces Beti-10, Nanka, Nanavala and Nkanamna used in this study have been identified as resistant to ALS but the nature of inheritance and mechanisms of resistance against ALS in those potential sources has not been elucidated. This information is crucial and a necessary first step for a successful breeding programme. The objective of this work was to study the inheritance of ALS resistance in those landraces and to identify the mechanisms of genetic resistance using Simple Sequence Repeat (SSR) markers. Crosses were made between resistant bean landraces and a susceptible bean cv Kablanketi. The parents, F1, F2 and backcrosses derived plants were used for inheritance studies and for molecular marker screening using 30 SSR markers. Results indicate that, a single dominant gene control resistance against ALS in each of the four landraces; also the SSR marker Pv-ag004 was found to be polymorphic between Beti-10 and Kablanketi and linked to the disease resistance. The resistance were validated by checking the F2 population of the cross between Kablanketi × Beti-10. Therefore, since marker Pv-ag004 is polymorphic and linked to ALS resistance, the Beti-10 landrace might be a potential source of ALS resistance. However, a detailed study with more markers need to be done on these landraces with a view to opening the possibilities of identifying new markers linked to ALS resistance and mapping of genes associated with resistance to ALS.
Genetic parameters estimate of iron and zinc nutrients in common bean genotypes
(African Journal of Agricultural Research, 2024-06) Magomere, Kinguye Masamaki; Nchimbi-Msolla, Susan; Tryphone, George Muhamba
There is need to know the heritability of different traits for the effective selection of parents for future breeding activities. A study was carried out to determine heritability of iron and zinc in common bean. Crosses were made with each donor and recipient parents to obtain four different types of crosses. Part of the F1 seed from each cross was sown in the screen house to produce F2 seeds and also backcrossed to both parents. Heritability was estimated using backcross method for high broad sense heritability and narrow-sense heritability. Broad sense heritability for progenies of NUA 11 × Zawadi (56%), NUA 11 × Pesa (76%), NUA 17 × Zawadi (57%) and NUA 17 × Pesa (59%) were obtained. Narrow sense heritability estimates for progenies of NUA 11×Zawadi, NUA 11 × Pesa, NUA 17 ×Zawadi and NUA 17 × Pesa were 65%, 71%, 79% and 63%, respectively. Genetic advance (GA) values for NUA 17 × Zawadi, NUA 11 × Pesa, NUA 17 × Pesa and NUA 11 × Zawadi was 35, 12.3, 3.5 and 1%, respectively. This study demonstrates that there is a potential for improvement of concentration of iron and zinc in common bean genotypes. Therefore, selection of a superior genotype on the basis of its phenotypic performance, heritability of traits could be well exploited.
Impact of cucurbit crop management techniques on the foraging behavior of honeybees and hoverflies in Morogoro, Tanzania
(BMC Ecology and Evolution, 2024) Rweyemamu, Elvillah William; Mwatawala, Maulid Walad; Tryphone, George Muhamba; Meyer, Marc De; Kabota, Sija; Bwire, Patroba Masatu
Background Poor agricultural practices have drastically threatened insect pollinators’ biodiversity. Little is known in Tanzania about how different agricultural practices affect pollinators’ foraging behavior. This study investigated the effects of the agroecological zone, season, cucurbit species and management practices on visitation frequency, visitation rate and time spent on cucurbit flowers by five pollinator species viz. Apis mellifera, Eristalinus megacepha- lus, Mesembrius caffer, Paragus borbonicus and Toxomerus floralis. The experiment was designed as a 5 × 3 × 3 × 2 × 2 factorial arrangement in a Randomized Complete Block Design (RCBD) with four replications. GAMOUR-Agroecology was tested against conventional practices and untreated control. Results This study revealed significant effects of agroecological zone × season × cucurbit species × management practice on pollinators’ visitation frequency (p = 0.007) and time spent on flowers (p = 0.005). Also, agroecological zone × season × cucurbit species × pollinator species significantly (p < 0.0001) affected pollinators’ visitation frequency. Agroecological zones × season × cucurbit species × cucurbits management practices × pollinators significantly (p = 0.001) affected pollinators’ visitation rate. Apis mellifera was the most frequent visitor in Cucurbita moschata plots treated with GAMOUR- Agroecology in the plateau zone, also, visited higher number of Cucumis sativus plots under GAMOUR-Agroecology practices in the mountainous zone during the October–November season. Further- more, it has been found that pollinators spent much in cucurbit flowers on plots with GAMOUR-Agroecology prac- tices and control. Conclusions Pollinators’ foraging behavior were enhanced by GAMOUR-Agroecology practices. Therefore, this study recommended that cucurbit growers should consider management practices that positively influence pollinator foraging activities for sustainable cucurbit production
The impact of land tenure and degradation on adoption of agroforestry in Uluguru mountains forest, Tanzania
(Research Gate, 2012) Ruheza, Sosthenes; Tryphone, George Muhamba; Khamis, Zuena K.
The influence of land tenure and land degradation on adoption of Agroforestry practices can not be overstated. A study was carried in Tandai village in Uluguru Mountains of Morogoro Rural District, Tanzania, to investigate on the impact of land tenure and degradation on the adoption of agroforestry methods and practices. A total of 50 heads of households, which is approximately 15% of the total number of farmers in the study area were respondents of the study. Questionnaire and checklist questions were used to collect primary data from farmers, government and Non-governmental officials respectively. Results show that although 98% of the respondents owned farmlands, 58% were not satisfied with their farm sizes. The study also revealed that 92% of the respondents said that the only way for acquiring extra farmland is through buying while 8% of the respondents said that they can inherit from their parents and/uncles. Of the respondents, 72% were aware of the causes to land degradation in their farmlands. From this study it is argued that low rate of adoption of agroforestry in Uluguru Mountains Forests might be not because of farmers’ resistance to change but due to a complex and sensitive land tenure systems which is one among other factors underpinning adoption of the practices. However, farmers’ awareness on intensity and causes of the land degradation on their farms, and their acknowledgement on the significance of agroforestry methods and practices for land conservation is a meaningful capital to facilitate adoption of the practices within the complex and sensitive land tenure system in Uluguru mountains forests.
Impact of sowing date and level of phosphorus application on economic returns in cotton
(Frontiers in Plant Science, 2024-06-12) Tlatlaa, Jacob Shauri; Tryphone, George Muhamba; Nassary, Eliakira Kisetu
This study explored the economic dynamics of cotton (Gossypium hirsutum L.) production in Msilale village, Chato District, Tanzania. The experiment utilized a factorial design with sowing dates on November 25th, December 15th, and January 4th, and phosphorus levels at 0, 20, 40, and 60 kg P ha-1, replicated three times. Results indicated significantly higher cotton yields (6.1 t ha-1 and 6.3 t ha-1) for November and December sowings compared to January (3.8 t ha-1). This is a 61% and 66% increase in cotton yields for November and December sowings, respectively relative to January sowing. Though not significant, 20 kg P ha-1 and 40 kg P ha-1 applications yielded 5.8 t ha-1 and 5.4 t ha-1, respectively, while 60 kg P ha-1 yielded 5.3 t ha-1. This is a 9.4% and 1.9% increase in cotton yields at 20 and 40 kg P ha-1, respectively relative to absolute control and 60 kg P ha-1 application. Economic analysis revealed that late sowing (January) had the lowest net profit (Tshs. 3,723,400 ≈ USD 1,486) and benefit-to-cost ratio (BCR) of 11.2. Early sowings recorded higher net profits (Tshs. 6,679,527 ≈ USD 2,666 and Tshs. 6,861,283 ≈ USD 2,738) and BCRs (18.4 and 18.8, respectively). This is a 79% (BCR = 64%) and 84% (BCR = 68) increase in net benefits from early sowings compared to late sowing. Applications of 20, 40, and 60 kg P ha-1 resulted in net benefits of Tshs. 5,452,572 ≈ USD 2,176 (BCR = 19.2), Tshs. 5,209,904 ≈ USD 2,079 (BCR = 15.1), and Tshs. 5,748,786 ≈ USD 2,294 (BCR = 14.1), respectively, with a significant (p = 0.017) BCR at 20 kg P ha-1 indicating cost-effectiveness. This is a 36% and 7.1% economic benefit at 20 and 40 kg P ha-1, respectively compared to 60 kg P ha-1 application. Optimizing sowing dates and P levels can boost economic returns in cotton production and promote sustainability.
Inheritance of Angular Leaf Spot [Phaeoisariopsis griseola (Sacc.) Ferr] Resistance in Common Bean (Phaseolus vulgaris L.) Population Developed from Kablanketi Mexico 54
(Journal of Agricultural Science and Technology, 2012-07-20) Tryphone, George Muhamba; Chilagane, Luseko Amos; Kusolwa, Paul Mbogo; Nchimbi-Msolla, Susan
The genetic resistance to angular leaf spot (ALS) caused by Phaeoisariopsis griseola in the common bean cultivar Mexico 54 was investigated on disease reactions in parental, F1, F2 and backcross generations derived from crosses between a resistant cultivar Mexico 54 and a susceptible cultivar Kablanketi under screen house conditions. The heritability (h2) estimate was as high as 0.719 indicating a successful transfer of ALS resistance among progenies and thus selection can be performed in early generation. High heritability coupled with high expected genetic advance of 39.5% is considered to be more useful in predicting the outcome of selecting the best individuals. Chi-square values were computed to determine whether the observed ratios for disease reactions deviated from expected Mendelian ratios for a single, dominant gene controlling resistance to angular leaf spot in common bean. Based on the resistance of the F2, and the backcross generation to the resistant parent, a 3 resistant: 1 susceptible segregation ratio in the F2 and a 1 resistant: 1 susceptible segregation ratio in the backcross generation to the susceptible parent was obtained implying that resistance to the isolate of Phaeoisariopsis griseola is governed by a single, dominant gene.
Inheritance of angular leaf spot [Phaeoisariopsis griseola (Sacc.) Ferr] resistance in common bean (Phaseolus vulgaris L.) population developed from Kablanketi x Mexico 54
(David Publishing, 2012-07-20) Nchimbi-Msolla, Susan; Tryphone, George Muhamba; Chilagane, Luseko Amos; Kusolwa, Paul Mbogo
The genetic resistance to angular leaf spot (ALS) caused by Phaeoisariopsis griseola in the common bean cultivar Mexico 54 was investigated on disease reactions in parental, F1, F2 and backcross generations derived from crosses between a resistant cultivar Mexico 54 and a susceptible cultivar Kablanketi under screen house conditions. The heritability (h2 ) estimate was as high as 0.719 indicating a successful transfer of ALS resistance among progenies and thus selection can be performed in early generation. High heritability coupled with high expected genetic advance of 39.5% is considered to be more useful in predicting the outcome of selecting the best individuals. Chi-square values were computed to determine whether the observed ratios for disease reactions deviated from expected Mendelian ratios for a single, dominant gene controlling resistance to angular leaf spot in common bean. Based on the resistance of the F2, and the backcross generation to the resistant parent, a 3 resistant: 1 susceptible segregation ratio in the F2 and a 1 resistant: 1 susceptible segregation ratio in the backcross generation to the susceptible parent was obtained implying that resistance to the isolate of Phaeoisariopsis griseola is governed by a single, dominant gene.
Microsatellite analysis of common bean (Phaseolus vulgaris L.) genotypes in Tanzania for diversity in seed iron and zinc micronutrients
(Greener Journal of Plant breeding and Crop Science, 2023-02-15) Yanda, Focus Edson; Tryphone, George Muhamba
Common bean (Phaseolus vulgaris L.) grain has big dietary role in supplying protein, energy, vitamins, dietary fibre and micronutrients for millions of people worldwide. In Tanzania, reports have shown existence of Fe and Zn micronutrient variabilities among the common bean genotypes. Eighty-four (84) genotypes were collected to study such variability by seed biochemical and leaf molecular marker analysis. The analyses revealed significant (p < 0.001) genetic variability for seed Zn and Fe nutrient contents. Highest seed Fe content was 118 ppm for genotype Kashiransoni and for seed Zn was 51.81 ppm for Imponzo 5 genotype (both were collected from NPGRC). With seven (7) SSR primers associated with Fe and Zn traits, genetic diversity was evaluated. A marker BM154 scored PIC value 0.967 mean while marker BM160 had a lowest PIC score of 0.899. Using an estimated genetic similarity value, two main clusters with sub clusters in the dendrogram were developed. To corroborate the UPGMA analysis results, a Principal Coordinate Analysis (PCoA) was performed and displayed outputs into scattered plot presentation. For Fe micronutrient improvement purposes, Inula was proposed to be crossed with Kashiransoni while Roba with Imponzo 5 for Zn micronutrient improvement. Selection was based on both concentrations of nutrients for each genotype and their genetic similarity distances.
Studies on the influence of tree tenure on the adoption of agroforestry practices in Uluguru mountains, Tanzania
(Research Gate, 2012) Ruheza, Sosthenes; Tryphone, George Muhamba; Mbwambo, Jonathan Stephen; Khamis, Zuena K.; Swella, George; Mushobozy, Deus K.
On-farm tree retention formed the basis for the present day agroforestry systems in many traditions. In the present study, we assessed the influence of tree tenure on the adoption of agroforestry practices in Uluguru Mountains, Tanzania. Results showed that most of the farmers (92%) were involved in activities related to tree planting and/or tree retaining with the number of trees planted in existing farmlands ranging between 150 to more than 300. Young respondents planted more trees compared to middle and old age groups. Household labour unit level had an influence on the number and species of plant trees planted. The study revealed that men were significantly more involved in tree planting than women. It was also found by this study that most of the respondents (82.2%) were planting trees in their farms mainly for economic gains through timber production, while 13.3% and only 4.5% of the respondents were planting trees for soil conservation and for moisture conservation respectively. Therefore, more efforts need to be directed to planting tree species that have economic benefits to farmers in order to speed up the rate of agroforestry adoption. Perceived benefits of agroforestry practices in the study areas were for its easiness in the management of trees with other crops (59%), conservation of moisture (28%) and (13%) of the respondents said see no benefit of agroforestry system.
Unexplored agronomic, socioeconomic and policy domains for sustainable cotton production on small landholdings: a systematic review
(2023-11-20) Tlatlaa, Jacob Shauri; Tryphone, George Muhamba; Nassary, Eliakira Kisetu
Cotton productivity continues to be disputed, despite rapid advancements and widespread technologies. These uncertainties remain to be critically addressed in a broad spectrum focusing on domains at the global level. Therefore, this systematic review provides an overview of the existing advancements in knowledge, skills, and technologies for sustainable cotton production on small landholdings. Specifically, the areas of the cotton chain examined are threefold: - (1) Explore disguised agronomic practices to be endowed for sustainable cotton production on small landholdings; (2) Explore socioeconomic settings based on their disparities in contributing to sustainable cotton production on small landholdings; and (3) Explore existing and feasible institutional policies to be enforced for sustainable cotton production on small landholdings. This review shows that worldwide cotton production involves conventional and organic systems, at the expense of the traditional system. Heavy uses of nitrogenous fertilizers and pesticides are the common practices in conventional systems, with some adoptions of precision agriculture practices, and genetically modified varieties. Rotation and intercropping with early-maturing food crops are also identified viable options to improve farmers’ attitudes toward adopting cotton- producing technologies. In socioeconomics, farmers’ livelihoods are improved by income generation from sales of cotton and labour in the cotton industry. Gender equity in the cotton industry prioritizes females over males, as females display a group with a higher level of technology adoption. Generally, clear institutional policies governing the cotton industry are globally paucity. Furthermore, efforts to sensitize sustainable cotton production are still highly questionable and challenged by the superseding climate changes.
Unexplored agronomic, socioeconomic and policy domains for sustainable cotton production on small landholdings: a systematic review
(Frontiers in Agronomy, 2023-11-20) Tlatlaa, Jacob Shauri; Tryphone, George Muhamba; Nassary, Eliakira Kisetu
Cotton productivity continues to be disputed, despite rapid advancements and widespread technologies. These uncertainties remain to be critically addressed in a broad spectrum focusing on domains at the global level. Therefore, this systematic review provides an overview of the existing advancements in knowledge, skills, and technologies for sustainable cotton production on small landholdings. Specifically, the areas of the cotton chain examined are threefold: - (1) Explore disguised agronomic practices to be endowed for sustainable cotton production on small landholdings; (2) Explore socioeconomic settings based on their disparities in contributing to sustainable cotton production on small landholdings; and (3) Explore existing and feasible institutional policies to be enforced for sustainable cotton production on small landholdings. This review shows that worldwide cotton production involves conventional and organic systems, at the expense of the traditional system. Heavy uses of nitrogenous fertilizers and pesticides are the common practices in conventional systems, with some adoptions of precision agriculture practices, and genetically modified varieties. Rotation and intercropping with early-maturing food crops are also identified viable options to improve farmers’ attitudes toward adopting cotton- producing technologies. In socioeconomics, farmers’ livelihoods are improved by income generation from sales of cotton and labour in the cotton industry. Gender equity in the cotton industry prioritizes females over males, as females display a group with a higher level of technology adoption. Generally, clear institutional policies governing the cotton industry are globally paucity. Furthermore, efforts to sensitize sustainable cotton production are still highly questionable and challenged by the superseding climate changes.