Main Article Content
Globally the taro leaf blight (Phytophthora colocasiae) disease causes between 50 to 70% yield loss. Four taro landraces were planted in three agroecological zones of Cameroon; the Western Highlands (Bambui), Mono-Modal Humid Forest (Ekona), and the Bimodal Humid Forest (Nkolbisson) and evaluated for taro blight severity in four successive growing seasons in March and July, 2018 and 2019. Different concentrations of copper oxide (600 g)–Metalaxyl (120 g) fungicide were applied to control taro blight before and during plant growth. Results showed that, in all the field sites, the disease severity of Phytophthora colocasiae greatly decreased below 1.5 with varying concentrations of copper oxide (600 g)–Metalaxyl (120 g) fungicide applied at two-week intervals. The control field at Ekona recorded the highest taro blight severity of 7.8. There was no significant difference in taro blight severity (P≤0.05) between landraces treated with the different concentrations of copper oxide (600 g)–Metalaxyl (120 g) fungicide. Therefore, lower concentrations (0.33% and 0.27%) of copper oxide (600 g)–Metalaxyl (120 g) can be effectively used in the pre and post control of taro blight in the field. All the landraces in the screen house experiments were susceptible to P. colocasiae. In all the zones, Landrace L2 (red petiole small leaves) was highly resistant to P. colocasiae and should be recommended to farmers for optimum taro production in the three agro-ecological zones and zones with similar characteristics.
Brooks FE. Taro leaf blight. the plant health instructor. 2005;1-3. Available:http://www.apsnet.org/edcenter/intropp/lessons/fungi/, visited 17 September 2012..
Singh D, Jackson G, Hunter D, Fullerton R, Lebot V, Taylor M, Iosefa T, Okpul T, Tyson J. Taro Leaf Blight—A Threat to Food Security Agriculture. 2012;2:182-203.
Zhang KM, Zheng FC, Li YD, Ann PJ, Ko WH. Isolates of Phytophthora Colocasiae from Hainan Island in China: evidence suggesting an Asia origin of this species. Mycologia. 1994;86:108-112.
Bandyopadhyay R, Sarma k, Onyeka TJ, Aregbesola A, Kumar PL. First report of taro (Colocasia esculenta(L) Schott) leaf blight caused by Phytophthora colocasiae in Nigeria. Plant Diseases. 2011;95:618.
Singh D, Guaf J, Okpul T, Wiles G, Hunter D. Taro (Colocasia esculenta) variety release recommendations for Papua New Guinea based on multi-location trials. N.Z.J. Crop Horticultural Science. 2006;34:163–171.
Nelson S, Brooks F, Teves G. Taro Leaf Blight in Hawaii; Plant Diseases Bulletin No. PD -71; University of Hawaii: Manoa, HI, USA. New Caledonia. 2011;1-14.
Brunt J, Hunter D, Delp C. A Bibiliogrphy of Taro Leaf Blight; Secretariat of the Pacific Community: New Caledonia. 2001;1-10.
Mbong GA, Fokunang CN, Lum AF, Bambot MB, Tembe EA. An overview of Phytophthora colocasiae of cocoyams: A potential economic disease of food security in Cameroon. Discourse Journal of Agriculture and Food sciences. 2013;1(9): 140-145.
Guarion L. Taro leaf blight in Cameroon. Agricultural Biodiversity Weblog; 2010. Available:http://agro. Biodiver .Se/2010/ 07/ taro-leaf- blight-in- Cameroon/ Accessed on 15 May 2012.
Fontem DA, Mbong GA. A novel epidemic of taro (Colocasia esculenta) blight by Phytophthora colocasiae hits Cameroon (Abstact). In: Science de la vie et Productions animales. Third life Science Conference. CAFOBIOS, Universite de Dschang, Cameroun. 2011;26-28.
Tarla DN, Voufo G, Fontem DA, Takumbo EN, Tabi OF. Effect of planting period on taro (Colocasia esculenta (L) Schott) late blight caused by Phytophthora colocasiae Raciborsk Scholar Journal of Agricultural sciences. 2014;4(1):38-42.
Palomar MK, Mangaoang YC, Palermo VG, Escuadra GE, Posas MB. Biocontrol of root crop diseases through microbial antagonism. In Proceedings of the 4th Asia-Pacific Biotechnology Congress and 30th Annual Convention of the PSM; Laguna, Philippines, 16-18 May. 2001;56-62P.
Ghosh SK, Pan S. Control of leaf blight of taro (Colocasia esculenta (L.) Schott) caused by Phytophthora colocasiae Racib. Through fungicides and selection of variety. Journal of Mycopathological Research. 1991;29:133–140.
Manju EB, Fokunang CN, Mbong GA, Tima TS, Suh C, Tembe-Fokunang EA, Hanna R. Impact of Fungicide Application on Taro Leaf Blight Disease in three Regions Cameroon. Journal of Experimental Agriculture International. 2017;17(4):1-23.
Joshua SA. Identification of the major foliar fungal disease of Colocasia esculenta (L.) schott and its management in the Kumasi metropolis. Master thesis, Kwame Nkrumah University of Science and Technology. 2010;20–21.
Fokunang CN, Dixon AGO, Ikotun T. Survival and over-seasoning of Collectotrichum gloeosporidesf. sp. manihotison post-harvest Cassava (Manihot esculenta Crantz) Plant Materials and soils. Journal of Biological Sciences. 2004;4(4):423-430.
Fokunang CN. Evalation of cassava genotypes for resistance to anthranose, bacterial blight and mosaic diseases through integrated control strategies. PhD thesis, University of Ibadan, Nigeria. 1995;217.
Misra RS, Sahu AK, Maheswari SK, Sriram S, Sharma K, Suhu AK. Integrated management of Phytophthora leaf blight disease of taro (Colocasia esculanta (L) Schott). Journal of Root Crops. 2007;33(2):144-146.
Aggarwal A, Mehrotra RS. Effect of systemic and non-systemic fungicide on mycelia growth and respiration of Phytophthora colocasiae. Indian Phytophthora. 1988;41(4):590-194.
Aggarwal A, Kamlesh, Mehrotra RS. Control of taro blight and corm rot caused by Phytophthora colocasiae, homeopathic drugs. Plant Disease Research. 1993;8(2):94-101.
Cox PG, Kasimani C. Control of taro leaf blight using metalaxyl. Tropical Pest Management. 1988;34:81-84.
Das RS. Field efficacy of fungicide for the control of leaf blight disease of taro. Journal of Mycology and Plant Pathology. 1997;27(3):337-338.
Fontem DA, Gumedzoe MYD, Olanya M. Quantitative effect of Late Blight on potato yields in Cameroon. African Crop Science Proceedings. 2001;5:449-453.
Fullerton RA, Tyson J. Overview of leaf diseases of taro, in Proceedings of Taro Pathology and Breeding Workshop, Alafua Campus, Samoa. 2001;4–7.