Effect of leaf age of faba bean and inoculum level of Uromyces viciae-fabae on pustule development and spore production
Teame Gebrezgi (EARO, Addis Abeba (Ethiopia))
Leaf age and inoculum level are important factors for the development of rust disease epidemics in faba bean. The effect of these two factors on spore production and pustule density of rust caused by Uromyces viciae-fabae on faba bean was studied in growth room at Wye College in 1998. Three leaf ages and four levels of inoculum density were used in a crossed and nested design. High pustule number was recorded on young leaves followed by middle and then old leaves in all inoculum levels. In terms of overall spore yield, young leaves gave more spore mass than middle aged leaves. Application of highest inoculum level resulted in the highest pustule number. Generally, pustule number significanly (P0.001), df
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