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An Alternative Method to Evaluate Resistance to Pear Scab (Venturia nashicola)
Kyungho Won,Eu Ddeum Choi,Keumsun Kim,Hae Won Jung,Il Sheob Shin,Seongsig Hong,Cécile Segonzac,Young Jin Kim 한국식물병리학회 2023 Plant Pathology Journal Vol.39 No.2
Two pear cultivars with different degrees of resistance to Venturia nashicola were evaluated on the basis of a disease severity rating for pear scab resistance under controlled environmental condition. Two inoculation techniques were tested: the procedure for inoculation by dropping conidia suspension of V. nashicola; the procedure by deposition of agar plug on the abaxial surface of pear leaves. All tested cultivars resulted in blight symptoms on the inoculated leaves and became spread to uninoculated region or other leaves. Although both methods provide satisfactory infection of V. nashicola on pear leaves, the mycelial plug method of inoculation was more reliable than the spray inoculation method for the evaluation of pear scab disease resistance. The incubation period of V. nashicola in the resistant pear cultivar, Greensis was longer than that in the susceptible cultivar, Hwasan.