Susceptibility of some introduced sweet and sour cherries cultivars to Blumeriella jaapii (Rehm) and Myzus cerasi Fab. (Homoptera: Aphididae)
DOI:
https://doi.org/10.61308/RSIP6321Keywords:
sweet cherry; sour cherry; cherry leaf spot; black cherry aphid; cultivar susceptibilityAbstract
The sweet cherry is one of the leading fruit crops in temperate climates, playing an important role in Bulgaria’s fruit-growing sector. Sustainable plant protection of orchards from diseases and pests is a key priority in modern cherry production. The aim of the present study is to evaluate the susceptibility of introduced sweet and sour cherry cultivars to two major pests the fungal pathogen Blumeriella jaapii (Rehm) v. Arx, the causal agent of cherry leaf spot, and the black cherry aphid (Myzus cerasi Fabricius) - through comparative assessment under the agroclimatic conditions of the Kyustendil region. The study was conducted during the period 2017–2021 in the experimental orchards of the Institute of Agriculture – Kyustendil. The infection rate in different cultivars grown under conditions of integrated plant protection were analyzed. The results revealed significant cultivar differences in susceptibility. Under natural infection with B. jaapii, the cultivars ‘Santina’, ‘Sparkle’, and ‘Bigalise’ were most susceptible. Regarding Myzus cerasi, the sweet cherry cultivars ‘Bigalise’ and ‘Kristin’, along with the sour cherry cultivars ‘Montearly’, ‘North Star’, ‘Ohio’, ‘Heimanns Rubinweichsel’, and ‘Schattenmorelle’, showed the highest levels of susceptibility. The observed variability in pest and disease susceptibility among cultivars emphasizes importance of cultivar evaluation and the selection of genotypes with increased resistance for the needs of integrated pest management and sustainable fruit production.
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