scholarly journals Effect of temperature on sweet potato virus disease symptom expression

2017 ◽  
Vol 12 (27) ◽  
pp. 2295-2309 ◽  
Author(s):  
Sseremba Godfrey ◽  
Mukasa Settumba ◽  
Kyamanywa Samuel
Keyword(s):  
Sweet Potato ◽  
Potato Virus ◽  
Virus Disease ◽  
Disease Symptom ◽  
Effect Of Temperature ◽  
Symptom Expression ◽  
Potato Virus Disease ◽  
Sweet Potato Virus ◽  
Sweet Potato Virus Disease

Control strategies for sweet potato virus disease in Africa

2004 ◽  
Vol 100 (1) ◽  
pp. 115-122 ◽  
Author(s):  
Richard W. Gibson ◽  
Valentine Aritua ◽  
Emmanuel Byamukama ◽  
Isaac Mpembe ◽  
James Kayongo
Keyword(s):  
Sweet Potato ◽  
Potato Virus ◽  
Virus Disease ◽  
Control Strategies ◽  
Potato Virus Disease ◽  
Sweet Potato Virus ◽  
Sweet Potato Virus Disease

scholarly journals Evaluation of Selected Zambian Popular Sweet Potato Genotypes for Response to Sweet Potato Virus Disease

2020 ◽  
pp. 44-51
Author(s):  
Joseph Banda ◽  
Patrick Chiza Chikoti ◽  
Langa Tembo
Keyword(s):  
Sweet Potato ◽  
Potato Virus ◽  
Virus Disease ◽  
Beta Carotene ◽  
Yield Reduction ◽  
Tuber Weight ◽  
Carotene Content ◽  
Potato Virus Disease ◽  
Sweet Potato Virus ◽  
Sweet Potato Virus Disease

Aim: The objective of this study was to determine the effect of sweet potato virus disease (SPVD) on the beta carotene content, tuber weight and vine weight of selected popular sweet potato genotypes. Study Design: The experiment was laid as a randomized complete block design (RCBD) with three replications. Place and Duration of Study: The experiment was conducted for two cropping seasons (2015/16 and 2016/17) at the Zambia Agriculture Research Institute in Chilanga district of Zambia. Methodology: The uninfected (control) genotypes of Kanga, Chiwoko and Chingovwa were evaluated alongside their SPVD infected genotypes. Genotypic infection was confirmed using molecular approaches, and data was collected at harvest on beta carotene content, tuber weight and vine weight. Results: The results showed that SPVD affects the yield and beta carotene content of sweet potato. Significant differences (P< .001) for yield performance and beta carotene were observed. The yield reduction in percentage across seasons for all genotypes between the uninfected and infected genotypes ranged from 77% to 79% and 67% to 76% for tuber weight and vine weight respectively. Only Chiwoko exhibited higher levels of beta carotene among the genotypes. However, the SPVD infected Chiwoko genotype compared to the uninfected treatment produced mean beta carotene content of 39.1 µg/g and 91.5 µg/g respectively. Conclusion: SPVD reduces the tuber weight, vine weight and beta carotene content in infected sweet potato genotypes.

scholarly journals Symptoms, aetiology and serological analysis of sweet potato virus disease in Uganda

1998 ◽  
Vol 47 (1) ◽  
pp. 95-102 ◽  
Author(s):  
R. W. Gibson ◽  
I. Mpembe ◽  
T. Alicai ◽  
E. E. Carey ◽  
R. O. M. Mwanga ◽  
...  
Keyword(s):  
Sweet Potato ◽  
Potato Virus ◽  
Virus Disease ◽  
Serological Analysis ◽  
Potato Virus Disease ◽  
Sweet Potato Virus ◽  
Sweet Potato Virus Disease

Effects of Sweet Potato Virus Disease (SPVD) on the Yield of Sweet Potato Genotypes in Cameroon

1991 ◽  
Vol 27 (2) ◽  
pp. 221-225 ◽  
Author(s):  
J. M. Ngeve ◽  
J. C. Bouwkamp
Keyword(s):  
Sweet Potato ◽  
Potato Virus ◽  
Virus Disease ◽  
Yield Reduction ◽  
Storage Roots ◽  
Potato Varieties ◽  
Severity Rating ◽  
Potato Virus Disease ◽  
Sweet Potato Virus ◽  
Sweet Potato Virus Disease

SummarySweet potato virus disease (SPVD) causes strap-shaped leaves, vein-clearing, puckering, chlorosis and stunting in susceptible sweet potato varieties and yields are much reduced. To investigate the tolerance of genotypes and obtain a better appraisal of yield loss caused by SPVD, eight sweet potato varieties showing symptoms of SPVD were studied for two years in an area where SPVD is severe. Two varieties, although showing symptoms, were tolerant of the disease; their yields were not significantly depressed by SPVD. Among the remaining six varieties, storage root fresh yields were reduced by 56–90% in plants showing SPVD symptoms. Marketable yields, as well as total and marketable numbers of storage roots were similarly depressed by SPVD in the less tolerant varieties. Significant correlations were found between disease severity rating and yield reduction among cultivars.

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