Abstract
The Citrus Sanitation Center of the Estacion Experimental Agroindustrial Obispo Colombres in Tucuman, Argentina, has developed a virus bank of various graft-transmissible citrus pathogens found in northwestern Argentina. In this bank, several psorosis and concave gum isolates are maintained in Pineapple sweet orange seedlings. In order to characterize these pathogens, 11 isolates were indexed to seedlings of Pineapple sweet orange, Dweet tangor, Eureka lemon plus Etrog citron budded on rough lemon seedlings. Cross protection was applied for identifying psorosis-A. Symptoms obtained were variable and ranged from mild to very severe. A clear effect of temperature on symptom expression, and distinct differences in the reactions between psorosis-A and concave gum viruses were detected.
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