Welcome to International Network for Natural Sciences

Paper Details

Research Paper | March 5, 2022

| Download

Evaluation of taro leaf blight disease (Phytophthora colocasiae) incidence on Kenyan and Pacific Island taro (Colocasiae esculenta) accessions in Kakamega (Western Kenya)

Otieno Carren, Opande T. George, Palapala A. Valarie

Key Words:

Int. J. Biosci.12(6), 355-361, June 2018

DOI: http://dx.doi.org/10.12692/ijb/20.2.1-20

Certification: IJB 2018 [Generate Certificate]


Taro (Colocasiae esculenta) is an important staple crop for millions in most parts of the world. Humans obtain important nutrients such as calcium, phosphorus, iron, Vitamin C, thiamine, riboflavin and niacin from Taro. However its production in Kenya has faced challenges, such as the taro leaf blight disease caused by the fungus Phytophthora colocasiae. Racib that produces spores which are released in water and spread through rain splashes during the Kenyan rainy season when infection increases due to high temperature and high humidity. Pathogen control has relied on the use of fungicides that are too expensive. This study was thus initiated to evaluate the Phytophthora colocasiae disease incidences under field condition in Western Kenya. Disease incidence was assessed on two taro accessions namely; Colocasiae esculenta var antiquorum (L) Schott and Colocasiae esculenta var. esculenta (L) Schott when the total number of leaves and the number of infected leaves counted was expressed as a percentage of the total number of leaves per plants of each accession under varying climatic factors such as; Relative humidity, temperature and rainfall collected during the duration of the study period in Kakamega, Kenya. The data obtained when subjected to analysis of variance (ANOVA) showed higher percentage of mean disease incidence on Kenyan taro accessions than the Pacific island taro accession, thereby indicating a high adaptability of the Pacific taro to Kenyan weather conditions. After this study, it became clear that the high effect of weather parameters appeared to have an effect on disease incidences. Pathogen Infection increased under high relative humidity (86%), high temperature (29.60C) and high rainfall amounts (223.9mm). These results support the urgent need to develop sufficient control measures for the Kenyan taro accessions, possibly through genetic manipulation of the from Pacific taro so as to come up with resistant accessions suitable for Kenyan weather that consists of a humid, warm and high annual rainfalls.


Copyright © 2021
By Authors and International Network for
Natural Sciences (INNSPUB)
This article is published under the terms of the Creative
Commons Attribution Liscense 4.0

Evaluation of taro leaf blight disease (Phytophthora colocasiae) incidence on Kenyan and Pacific Island taro (Colocasiae esculenta) accessions in Kakamega (Western Kenya)

Adinde JO, Anieke US, Nwankwo OG, Agu CJ, Aniakor AC, Nwagboso AA, Eze CO. 2016. Incidence and severity of taro leaf blight in Iwollo, South Eastern Nigeria. International journal of current research in Biosciences and plant Biology.

Chiejina NV, Ugwuja FN. 2013. Incidence of Phytophthora Leaf-Blight Disease of Cocoyam in Nsukka Area of South-Eastern Nigeria. Journal of Botanical Research 4(1), 21-24.

Hiraida LS. 2016. Characterizing the pathogenicity profiles of Phyotphthora colocasiae. A thesis submitted to the University of Hawai’I at Hilo in partial fulfillment of the requirement for the degree of masters of Science in tropical conservation biology and environmental science.

Obi IU. 2002. Statistical methods of detecting differences between treatment means and research methodology issues in laboratory and field experiments Ap. Express Publication Company, Nsukka, Nigeria pp. 117.

Opara E, Njoku TC, Isaiah C. 2012. Potency of some plant extracts and pesticides on bacterial leaf blight diseases of cocoyam (Colocasiae esculenta) in Emudike, South Eastern Nigeria. Greener journal of Agricultural sciences 3(5), 312-319.

Rana U. 2006. Epidemiology and integrated management of Colocasiae esculenta. A thesis submitted in partial fulfillment of the requirements for the degree of Doctor of philosophy in Agriculture (Plant pathology).

Tarla DN, Voufo G, Fontem DA, Takumbo EN, Tabi OF. 2014. Effect of planting period cultivar on taro (Colocasiae esculenta (L.) Schott) Late blight caused by Phytophthora colocasiae Raciborski). Scholarly journal of Agriculture science 4(1), 38-42.


Style Switcher

Select Layout
Chose Color
Chose Pattren
Chose Background