Influence of Some Cultural Practices on the Incidence and Severity of Leaf Spot Disease of <i>Telfairia occidentalis</i>in Dschang

• 作者: Agyingi Lucy Ambang Kpu Andrew Kebei Mbong Grace Annih
• 来源期刊: 美国植物学期刊(英文)
• 学科: 医学
• 关键词: Telfairia occidentalis Cultural Practices INCIDENCE SEVERITY
• 年，卷（期）: mgzwxqkyw_2020,（12）
• 页码范围: 1861-1877
• 页数: 17页
• 分类号: R73

摘要

Fungi diseases are major diseases of </span><i><span style="font-family:Verdana;">Telfairia</span></i> <i><span style="font-family:Verdana;">occidentalis</span></i><span style="font-family:Verdana;"> (fluted pumpkin) in the major growing areas of the crop in Cameroon. This study was conducted between March and June in the cropping seasons of 2019 and 2020 to determine the effect of some cultural strategies </span><i><span style="font-family:Verdana;">viz.</span></i><span style="font-family:Verdana;">: tillage and no till, variation of sowing date and removal of diseased leaves on the incidence and severity of leaf spot disease caused by </span><i><span style="font-family:Verdana;">Phoma</span></i> <i><span style="font-family:Verdana;">sorghina</span></i><span style="font-family:Verdana;">. There were four sowing dates, and two tillage systems with no variation in planting distance in the two cropping seasons. The design used was Randomized Complete Block Design (RCBD) with three replications. There were three plots for each sowing date within each replication. Seeds were sown at the rate of 1 m × 1 m, with four seeds per experimental unit. Data for disease incidence and severity was recorded every fortnight, commencing three weeks after emergence (WAE) and for a period of eight weeks for each sowing date. Disease incidence and severity was determined using Microsoft Excel 2010 and the data was subjected to statistical analysis and the means separated by Duncan Multiple Range Test (DMRT) at 95% confidence interval. In addition, the relationship between disease incidence and disease severity was also determined using Pearson correlation. Analysis of variance showed that there was no significant difference in leaf spot disease incidence at till and no-till units within this study period irrespective of sowing date. However, significant differences in leaf spot disease incidence and severity was recorded between the two cropping seasons. Sowing date four recorded the highest disease severity (1.611 ± 0.73) compared