Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094
April 2015 Vol. 4(4): pp. 166-172
Copyright © 2015 Global Advanced Research Journals


Full Length Research Paper

Quantification and correlation of African cassava mosaic disease parameters on cassava genotypes (Manihot esculenta, Crantz) in Buea, Cameroon.

1Njock TE and 2Sama V


1Department of Agronomic and Applied Molecular Sciences, University of Buea, P.O. Box 63 Buea, Cameroon

2Institute of Management and Financial Accounting (IMFA), Molyko, Buea, Cameroon

*Corresponding Author’s Email:

Accepted 08 March, 2015



Cassava, Manihot esculenta Crantz is an important staple in sub-Saharan Africa, feeding over one billion people but cassava mosaic disease militates against its productivity. We quantified and correlated disease parameters of resistance-graded cassava genotypes to African cassava mosaic geminivirus disease in a completely-randomized block design. Resistant (8061), moderately-resistant (local) and susceptible (AA) cassava was planted 1.0 m, 0.70 m and 0.35 m apart randomized within each planting distance. The data on the disease parameters: incidence, index of severity of symptoms, and whitefly, egg and larval counts were subjected to analysis of variance (ANOVA) and correlations among the parameters determined by Pearson’s correlation coefficients. There were positive correlations among disease parameters. Higher whitefly population (4.07±1.74) occurred among plants with lower plant density (1.0 m) and lower populations (1.89±0.914) with those of higher density (0.35 m) for variety AA. Similarly, incidence (92.81±13.36%), severity (3.18±0.87), number of eggs (2.97±1.37) and larvae (1.97±1.11) were higher among plants of lower than those of higher plant density. Thus, cassava may be planted at relatively higher density to provide a favorable microclimatic environment for greater whitefly vector whitefly for its reduced build up hence lower chances of virus transmission and disease.

Keywords: Quantification, African cassava mosaic, cassava genotypes.

Related Articles

Okpara Ihunanya Chinyere
Usefulness of echocardiography in the diagnosis of heart failure
Glo. Adv. Res. J. Agric. Sci. January 2018 Vol: 7(1): - [Abstract] [Full Text - PDF] (332 KB)
Original Research Articles
Hennes Gentil de Araújo, Danúbia Cunha Sá-Caputo, Patrícia Fróes, Eric Heleno Frederico, Adalgisa Maiworm, Ailton Alexandre Santos, Clailson Henriques Almeida-Farias, Shyang Chang, Sohaku Bastos and Mario Bernardo-Filho
A systematic review of laser acupuncture on the management of low back pain
Glo. Adv. Res. J. Agric. Sci. December 2015 Vol: 4(12): - [Abstract] [Full Text - PDF] (174 KB)
Kandil A.A., A.E. Sharief and Marwa S. Ahmed
Seed Germination Characters of New and Aging Seed of Some Maize Hybrids as Influenced by Antioxidant and Growth Hormones
Glo. Adv. Res. J. Agric. Sci. March 2019 Vol: 8(3): - [Abstract] [Full Text - PDF] (1,683 KB)
Kandil A. A, Sharief A.E and Sayed A.A.,
Maize Hybrids Seed Germination Characters as affected by Seed Storage Periods, Conditions and Materials
Glo. Adv. Res. J. Agric. Sci. February 2019 Vol: 8(2): - [Abstract] [Full Text - PDF] (242 KB)
Ghazouani A; M’hamdi, N; Znaidi I.A; Darej, C; Guoiaa, N; Hasnaoui M.; Bouraoui, R and M’hamdi, H.
Life cycle analysis of raw milk production in Tunisia
Glo. Adv. Res. J. Agric. Sci. December 2018 Vol: 7(12): - [Abstract] [Full Text - PDF] (749 KB)
I.I. Fragoso-Castro, M. Cornejo-Mazón, O.A. Ramos-Monroy, M .T. Hernández-Botello, P. Rosales-Martínez, M.S. López-Cortez
Berries Harvested in Mexico and its Use to Prepare a Functional Drink Conserved By Ultrasonication
Glo. Adv. Res. J. Agric. Sci. February 2019 Vol: 8(2): - [Abstract] [Full Text - PDF] (847 KB)

Current Issue

Viewing Options

View Full Article - PDF
Download Full Article - PDF

Search for Articles

Njock TE on Google Scholar
Njock TE on Pubmed
Sama V on Google Scholar
Sama V on Pubmed


Viewed 1911
Printed 284
Downloaded 1743
Powered By iPortal Works