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Titolo:
Effect of local inoculum on the spread of sweet potato virus disease: limited infection of susceptible cultivars following widespread cultivation of a resistant sweet potato cultivar
Autore:
Aritua, V; Legg, JP; Smit, NEJM; Gibson, RW;
Indirizzi:
Univ Greenwich, Nat Resources Inst, Chatham Maritime ME4 4TB, Kent, England Univ Greenwich Chatham Maritime Kent England ME4 4TB 4 4TB, Kent, England Eastern & So Africa Reg Ctr, Int Inst Trop Agr, Kampala, Uganda Eastern & So Africa Reg Ctr Kampala Uganda st Trop Agr, Kampala, Uganda Namulonge Agr & Anim Prod Res Inst, Kampala, Uganda Namulonge Agr & Anim Prod Res Inst Kampala Uganda Inst, Kampala, Uganda
Titolo Testata:
PLANT PATHOLOGY
fascicolo: 5, volume: 48, anno: 1999,
pagine: 655 - 661
SICI:
0032-0862(199910)48:5<655:EOLIOT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
CLOSTEROVIRUS; NIGERIA; UGANDA;
Keywords:
Ipomoea batatas; plant resistance; sweet potato virus disease; whitefly;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Gibson, RW Univ Greenwich, Nat Resources Inst, Cent Ave, Chatham Maritime ME4 4TB, Kent, England Univ Greenwich Cent Ave Chatham Maritime Kent England ME4 4TB d
Citazione:
V. Aritua et al., "Effect of local inoculum on the spread of sweet potato virus disease: limited infection of susceptible cultivars following widespread cultivation of a resistant sweet potato cultivar", PLANT PATH, 48(5), 1999, pp. 655-661

Abstract

A study compared the spread of sweet potato virus disease (SPVD) into crops of two moderately resistant and initially SPVD-free sweet potato cultivars in northern and southern Mpigi, Uganda. Whiteflies, the vector of sweet potato chlorotic stunt crini virus (SPCSV), a component cause of SPVD, were similarly abundant in farmers' sweet potato fields around Namulonge in northern Mpigi, and Kanoni in southern Mpigi. However, mean incidence of SPVD in farmers' crops neighbouring the trials was higher at Kanoni (13.3%) than at Namulonge (2.8%). Furthermore, spread of SPVD into initially SPVD-free sweet potato plots of two only moderately resistant cultivars was greater inplots at Kanoni than in plots at Namulonge. The SPVD-resistant New Kawogo was the most common cultivar grown in farmers' fields at Namulonge and had few diseased plants, whereas susceptible cultivars with relatively high incidences of disease predominated at Kanoni. Final SPVD incidence in each trial was positively correlated with a measure combining the proximity and level of inoculum in surrounding fields. The study demonstrates the importanceof local SPVD inoculum in determining the rate of spread of the disease into fields and implies that the widespread cultivation of a resistant variety limits infection of susceptible cultivars grown nearby.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 14:47:50