Prakh, S.V., & Storchevaya, E.M. 2003 [Resistance of fruit crops to damage by the San Jose scale.]. Zashchita i Karantin Rastenii No. 11: 41 pp.

Notes: The San Jose scale [Diaspidiotus perniciosus] is a dangerous pest of fruit, ornamental and forest plantations in the Kuban region, southern Russia. The greatest damage is caused to apple, pear, myrobalan plum [Prunus cerasifera] and peach. Investigations of the degree of damage in fruit crops, measured on a scale of 0-4, were conducted in the Krasnodar region. Apple was the most damaged crop, followed by plum, myrobalana plum, quince, sour cherry, apricot, pear, peach and sweet cherry in the central zone of orchard plantations. Quince and apple were the most affected crops in the northern zone. Investigations were conducted during 2001-02 to study reactions of apple cultivars to insect damage. Of 45 cultivars studied, none was free from infestations. Jonared was the most resistant cultivar, followed by Grieve Rouge, King David, Mackintosh, Prima, Renet Simirenko, Renet shampanski?, Spartan, Welsy and Starking.