Diseases and pests of sour cherry and their control in conventional and integrated plant protection
Keywords:
control; conventional protection; diseases; integrated protection; pests; sour cherryAbstract
The investigations were made in the experimental sour cherry orchard with cultivar Erdi Bötermo during the period 2010 – 2014 at the Institute of Agriculture – Kyustendil, Bulgaria. The aim of the studies was to establish economically important diseases and pests on sour cherry and their control by the conventional and integrated plant protection. Also to determine the frequency of PNRSV and PDV and provide a more complete picture of the health status of the study sour cherry garden. It was used generally accepted methods in plant pathology and entomology. It was established damages by six funguses during the investigated period. The blossom and twig blight caused by Monilinia laxa and cherry leaf spot caused by Blumeriella jaapii are the most economically important fungal diseases, which are required annual treatments. PNRSV was identified in 1.3% of tested samples. No infection of PDV in analysed trees was detected. Cherry fruit fly (Rhagoletis cerasi L.) and black cherry aphid (Mytus cerasi F.) are economically important pests of sour cherry. In application of integrated plant protection, the pesticide treatments are reduced up to 1 – 2 number based on the use of post-infection (curative) treatments against cherry leaf spot and economic threshold for the control of cherry fruit fly, black cherry aphid and leafrollers (Tortricidae).
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