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Distribution and virulence of fungal species isolated from yam (Dioscorea spp.) tubers in three agroecological zones of Nigeria

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Title Distribution and virulence of fungal species isolated from yam (Dioscorea spp.) tubers in three agroecological zones of Nigeria
 
Creator Dania, V.O.
Fadina, O.O.
Ayodele, M.
Kumar, P. Lava
 
Subject lesions
pathogens
field experiments
yams
nigeria
dioscorea rotundata
agroecology
virulence
 
Description Field surveys were conducted in 2012 and 2013 to evaluate the distribution and virulence of fungal isolates associated with tuber rot disease among yam (Dioscorea spp.) producing agroecological zones (AEZs) of Nigeria. A total of 70 and 66 farmers’ fields were surveyed in 2012 and 2013, respectively among three yam species, Dioscorea rotundata, D. alata and D. cayenensis. Fifteen rotted samples were randomly collected per each yam species in fourteen districts across the humid rainforest (HF), the derived savanna (DS) and the southern Guinea savanna (SGS) agroecologies. Twenty-one fungal species were isolated in the HF, 18 species in the DS and 16 in the SGS. The highest rot severity was in HF agroecology in the D. rotundata which varied from 27.2% to 65.7% in 2012 and from 21.1 to 57.4% in 2013, while the SGS agroecology had the least severity. Lasiodiplodia theobromae was the most virulent pathogen with lesion diameter of 26.8–42.1 mm at 14 days after inoculation. Findings provide baseline information for the formulation of management strategies for yam tuber rot disease in Nigeria.
 
Date 2020-07-02
2019-07-31T13:43:53Z
2019-07-31T13:43:53Z
 
Type Journal Article
 
Identifier Dania, V.O., Fadina, O.O., Ayodele, M. & Kumar, P.L. (2019). Distribution and virulence of fungal species isolated from yam (Dioscorea spp.) tubers in three agroecological zones of Nigeria. International Journal of Pest Management, 1-10.
0967-0874
https://hdl.handle.net/10568/102390
https://doi.org/10.1080/09670874.2019.1629041
PLANT PRODUCTION & HEALTH
 
Language en
 
Rights Copyrighted; all rights reserved
Limited Access
 
Format p. 252-261
 
Publisher Informa UK Limited
 
Source International Journal of Pest Management