Abstract
Nineteen sweet potato genotypes were screened for tolerance against sweet potato weevils and viruses at different locations of Eastern Hararge. Disease incidence and weevil population was assessed using standard procedures. Results of this study revealed that sweet potato weevils (SPW) and sweet potato virus diseases (SPVD) were present in studied area varied among sweet potato genotypes. Genotypes; Awassa-83, Bekale-A, Bekale-B, CN-1752-9, Cuba-2, Korojo, TIS-70357-5 and TIS-9465-2 had least load of SPW while, Bekale-A, TIS-8250-7 and TIS-9465-2 genotypes were free of virus diseases. Genotypes showing resistance to sweet potato can be used in varietal improvement program. The present studies concluded that the resistant sweet potato genotypes identified for SPW and SPVD could be utilized in integrated sweet potato production for the locations where the pests are major production bottleneck, like in Eastern Hararge. Key words: Resistant, tolerance, Integrated pest management (IPM), sweet potato viruses, Oromiya, Hararge.
Highlights
Sweet potato (Ipomoea batatas (L) Lam.) is one of the world’s most versatile crops and it is an important crop inEast Africa (Stevenson et al, 2009)
The result indicates that a significant (p
The results of the current study revealed a high prevalence of virus diseases and variation in the incidence among genotypes in eastern Hararge, Oromiya, Ethiopia
Summary
Sweet potato (Ipomoea batatas (L) Lam.) is one of the world’s most versatile crops and it is an important crop inEast Africa (Stevenson et al, 2009). Over the years the significance of sweet potato usage in Ethiopia, east and southwestern, has shown increasing trend. The obtained yields are far below the average production. Many factors including both biotic and abiotic limits the production and productivity of sweet potato in Eastern Oromiya, in particular in East Hararge. World-wide weevils are economically important pests in horticultural crops (Braimah and Emden, 2010; Karuppaiah, 2015). Among various production constraints, sweet potato weevil (SPW) (Cylas puncticollis Boheman) (Tarekegn et al, 2014a), striped sweet potato weevil (Alcidodes dentipes (Olivier)) are economical interest of this important crop in Ethiopia and virus-induced diseases are important issues for yield reduction
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