American Journal of Agriculture https://ajpojournals.org/journals/index.php/AJA America Journal of Agriculture is a high factor journal accredited for its vital insight information<strong> </strong>published by AJPO. The journal aims at advancing agriculture in all its areas that include arid soil research and rehabilitation, agriculture genomics, stored product research, tree fruit production, agronomy, weed biology, pesticide science, post-harvest biology and technology. en-US journals@ajpojournals.org (Journal Admin) support@ajpojournals.org (Journal Support) Wed, 05 Oct 2022 08:36:39 +0300 OJS 3.2.1.1 http://blogs.law.harvard.edu/tech/rss 60 Diversity of Viruses and Viroids Infecting Taro in Kenya Based on Small RNA Sequencing and PCR Detection https://ajpojournals.org/journals/index.php/AJA/article/view/1281 <p><strong>Purpose:</strong> Viral diseases cause severe yield losses and quality decline in crops worldwide. Despite their economic significance, the occurrence and distribution of the major viruses and viroids infecting Taro in Kenya remain poor, limiting the development of robust disease management strategies to mitigate their spread. This study thus aimed to identify the viruses and viroids infecting Taro in Kenya as a basis for developing effective management strategies to support the prevention and control of Taro viruses.</p> <p><strong>Methodology:</strong> Viral surveys and sampling were conducted across nine Taro-growing counties with diverse agroecological conditions in Kenya to determine the incidence and distribution of viruses affecting Taro. Leaf and whole plant samples of symptomatic edible and wild Taro were collected for PCR, RT-PCR, and small RNA sequencing assays to determine the diversity of viruses and viroids infecting Taro.</p> <p><strong>Results:</strong> Disease-like symptoms, including stunting, leaf rolling, shrinkage, deformed leaves with mosaic and yellow veins, and dwarfism, were observed. An overall mean disease incidence of 32-60% was recorded in all sites surveyed. Small RNA sequencing revealed the presence of both DNA and RNA viruses. Detected DNA viruses included the <em>Taro Bacilliform Virus</em> (TaBV) and <em>Taro Bacilliform CH Virus </em>(TaBCHV), badnaviruses specific to Taro, the <em>sweet potato Badnavirus B</em>, <em>sugarcane bacilliform virus</em>, and <em>sweet potato leaf curl virus</em>. The RNA viruses included the sweet potato feathery mottle and <em>Phaseolus vulgaris alphaendornavirus</em>. A Citrus exocortis viroid was also detected. Interestingly, the wild relatives of Taro displayed very few viral sequence hits. This study reports the Taro viruses and viroids circulating in Kenya and is the first to describe the incidence, distribution, and sequence variability of TaBV in Kenya.</p> <p><strong>Recommendations:</strong> Future studies should focus on developing effective management strategies to support the prevention and control of Taro viruses, including genetic resources for virus-Taro interactions, removing infected crops, controlling insect vectors, and developing virus-free planting materials.</p> David K Muruu, Johnson Kinyua, Mercy Kepue, Linnet Kerubo,  Isaac Njaci, Bernard Mware Copyright (c) 2022 American Journal of Agriculture https://ajpojournals.org/journals/index.php/AJA/article/view/1281 Thu, 17 Nov 2022 00:00:00 +0300 Challenges of Sugarcane Farmers in Sindh: A Micro-Level, Qualitative Study of Ghotki District https://ajpojournals.org/journals/index.php/AJA/article/view/1244 <p><strong>Purpose:</strong> In Pakistan, sugarcane possesses significant importance in national agriculture to produce crystalline sugar and sugary production. However, the production is stagnant and faces multiple issues. This study aims to evaluate and solve the challenges that sugarcane farmers face in Sindh, providing evidence from sugarcane-rich district Ghotki.</p> <p><strong>Methodology:</strong> We collected the data from sugarcane farmers in four areas of the Ghotki district via five in-depth interviews and five focus group discussions.</p> <p><strong>Findings:</strong> The results pointed out that the sugarcane farmers are small landholders, and the sugarcane crop is their only source of livelihood. The significant challenges they faced were the sugarcane production system, land preparation, planting seasons, small landholdings, lack of capital, social problems, transportation, harvesting, and credit shortage.</p> <p><strong>Unique Contribution to Practice and Policy:</strong> These findings are crucial for responsible institutions, mainly agriculture extension in the province, to devise policies to improve their livelihoods. If the government takes necessary action on these challenges, production and yield can increase in-country and the national economy by exporting refined crystalline sugar.</p> Mushtaq Ahmed, Dr. Khalil Ahmed Channa Copyright (c) 2022 American Journal of Agriculture https://ajpojournals.org/journals/index.php/AJA/article/view/1244 Fri, 21 Oct 2022 00:00:00 +0300 Body Weight and Biometric Parameters of Piglets Reared under Intensive System of Management in the Humid Tropic https://ajpojournals.org/journals/index.php/AJA/article/view/1278 <p><strong>Purpose:</strong> A total of 60 pigs of both sexes (30 males and 30 females) reared under intensive system of management were randomly sampled and used in this study that lasted for 20 weeks, to assess the relationship between bodyweight and biometric parameters.</p> <p><strong>Methodology:</strong> Data obtained for bodyweight (kg), height (cm), body length (cm) and heart girth (cm) were subjected to Bivariate Pearson Correlation, analysed using SPSS version 25.</p> <p><strong>Findings:</strong> The result showed that despite higher numerical values recorded for female pigs, there were no correlation between sex and other body biometric parameters. However, body weight had strong correlation with other biometric parameters analysed. The body length had the highest direct contributions (r = 0.981) to body weight in male and female pigs respectively.</p> <p><strong>Unique contribution to theory, practice and policy: </strong>The forecast indices recorded in this work could be employed to predict bodyweight estimation and help in making management decision and breeding programs for genetic improvement in pigs.</p> Odo B.I, Obiagwu C.C, Amalu T.C Copyright (c) 2022 American Journal of Agriculture https://ajpojournals.org/journals/index.php/AJA/article/view/1278 Fri, 11 Nov 2022 00:00:00 +0300