Field management of Taro (Colocasia esculenta (L.) Schott) leaf blight via fungicidal spray of foliage

Journal of the Cameroon academy of sciences Pub Date : 2021-04-19 DOI:10.4314/JCAS.V16I3.2

T. Mbi, Godswill Ntsomboh-Ntsefong, L. B. Tonfack, E. Youmbi

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引用次数: 3

Abstract

Taro leaf blight (TLB) epidemic hit Cameroon for the first time in 2009. Since then, the disease is persistent and its typical devastating legacy is threatening Taro (Colocasia esculenta) in the North and South West Regions of Cameroon. This study was initiated with the objective to determine the potentials of some fungicides to control TLB. The experimental design was completely randomized with a 3x15x2 factorial, including 3 treatments: T1 (Callomil plus72WP), T2 (Mancoxyl plus 720WP) and T3, 1:1 ratio T1 + T2 all applied at concentrations of 4g/L; 15 repetitions and 2 planting seasons (dry season i.e. October 2014 – March 2015 and rainy season i.e. April-October 2015). Disease incidence and disease severity were used to evaluate the disease progression while corm yield was used to appraise the economic injury. The results revealed disease incidence of 0% during the dry season and 18.2%, 27.3% and 100%, for T1, T2 and T3 and control during rainy season respectively. Disease severity was 75% in control and only 1% for the different treatments. Corm yield in the rainy season was 17.4kg, 15.08kg, 14.27kg and 5.89kg for T1, T2, T3 and control respectively. This study suggests that TLB epidemic can effectively be managed by foliage spray with Metalaxyl containing fungicides at a weekly dosage of 4g/ L.

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芋的田间管理通过叶片的杀真菌喷雾来防治叶枯萎病

芋头叶枯病(TLB)于2009年首次袭击喀麦隆。自那时以来，该疾病持续存在，其典型的破坏性遗产正在威胁喀麦隆北部和西南地区的芋头。本研究的目的是确定一些杀菌剂控制TLB的潜力。试验设计采用3x15x2因子完全随机化设计，包括3个处理:T1(卡罗密加72wp)、T2(曼可赛特加720WP)和T3(1:1比例T1 + T2)，浓度均为4g/L;15次重复，2个种植季节(旱季即2014年10月- 2015年3月，雨季即2015年4月- 10月)。以发病率和严重程度评价病害进展，以玉米产量评价经济危害。结果显示，旱季发病率为0%，雨季T1、T2和T3与对照分别为18.2%、27.3%和100%。对照组的疾病严重程度为75%，而不同治疗组仅为1%。雨季玉米产量T1、T2、T3和对照分别为17.4kg、15.08kg、14.27kg和5.89kg。本研究表明，含甲螨灵的杀菌剂每周喷施4g/ L，可有效控制TLB的流行。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Journal of the Cameroon academy of sciences

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