COMPARATIVE EVALUATION OF THE DEGREE OF FIRE BLIGHT RESISTANCE IN VARIOUS PEAR CULTIVARS AND SELECTIONS
In a separate study in Maryland, 2 trees each of about 500 pear cultivars were planted in 1964. By 1971, 38 of the cultivars were rated moderately resistant to resistant to epiphytotic fire blight. Seven of these cultivars are of Oriental origin. To date, all except 1 of the cultivars have maintained resistance to fire blight even though 12 cultivars have shown some degree of blossom, shoot and/or trunk blight following artificial inoculation in the orchard.