Netradiční ovocné dřeviny a jejich ochrana

Abstract

Malfunctions, lesions and diseases on uncommon fruit trees was observed in the ŠZP Žabčice from April to October 2013. As the most important bacterial disease has been detected fire blight of the quince. Several sea-buckthorns died from multifactorial causes. There was incidence of powdery mildew and brown leaf spot on the Amelanchier, varieties of the A. alnifolia were more affected by leaf spot, while the varieties of the A. lamarckii had a significantly higher incidence of powdery mildew. On the rowan there was recorded scab and viral infection on the few trees. The minimum symptoms of diseases occurred on the dogwood, mulberry and rose. No symptoms of diseases were observed on medlar, but it was affected by chlorosis. Principles for the protection is correct agrotechnik and regular removal of infected and damaged parts of the trees. Chemical protection is needed for a quince and a juneberry. Keywords: dogwood, rowan, quince, medlar, mulberry, juneberry (Amelanchier), sea-buckthorn, Rosa villosa, fire blight, powdery mildew