Preliminary assessment of selected sweet cherry hybrids regarding their resistance to black cherry aphid (Myzus cerasi Fabr.) in Bulgaria

D. Stefanova*, S. Malchev Fruit Growing Institute, 12 Ostromila Str., 4004 Plovdiv, Bulgaria (Manuscript received 7 July 2020; accepted for publication 11 August 2020) Abstract. One of the main insect pests of the cherry trees in Bulgaria is Myzus cerasi (Homoptera, Aphididae). The bl
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