Occurrence of barley yellow dwarf virus (BYDV) on wheat in Jordan
1989
El-Zou'bi, M.N.F.
A study was initiated in 1987 to isolate and identify different strains of barley yellow dwarf virus in Jordan. Moreover, studies on the incidence, economical importance and epidemiology of the disease were carried out. Strains of barley yellow dwarf virus including MAV, PAV, RPV and RMV occurred separately or in mixed infection in the plants, were identified on the basis of host range, symptomology, insect transmission and serology. Incidence of barley yellow virus reached 22 %, 35 %, 65 % and 59 % in wheat, barley, corn and sorghum, respectively. The virus was recovered from all tested grasses. Grasses are seemingly the more critical virus source which in presence of Rhopalosiphum midis, Rhopalosiphum padi, Macrosiphum avenae and Schizaphis graminum aphid vectors may lead to high seasonal incidence of the disease. BYDV reduced the plant height and grain yield in both wheat and barley. The Hourani cultivar is more tolerant to the virus than other tested wheat cultivars, whereas Acsad 176 showed more tolerance than other barley cultivars
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