Volume 9, Issue 1 (3-2020)                   pps 2020, 9(1): 57-67 | Back to browse issues page


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Ebrahimi L. Scab diseases of apple and pear. pps. 2020; 9 (1) :57-67
URL: http://yujs.yu.ac.ir/pps/article-1-299-en.html
Aburaihan Campus, University of Tehran, Tehran, Iran , le_ebrahimi@ut.ac.ir
Abstract:   (1636 Views)
Ebrahimi L (2020) Scab diseases of apple and pear. Plant Pathology Science 9(1):57-67. DOI: 10.2982/PPS.9.1.57

Apple and pear scab diseases caused by Venturia inaequalis and V. pyrina are the most important economical diseases on these plants. These pathogens overwinter in the form of spherical pseudothecia on the remnants of infected leaves. However, in areas with mild winters, they remain as mycelium or conidia in buds and branches. Symptoms of the disease on the leaves are black spots with a velvety surface. In severe and early infections on fruits, deformity and cracks occur. Humidity and temperature are important and influential factors in the prevalence and severity of this disease. The disease will be severe in areas where the weather is cool and humid in spring and early summer. Symptoms of diseases, morphological characteristics of pathogens, disease cycles and disease management methods including resistant cultivars, horticultural sanitation, biological control, chemical control and their forecasting program are illustrated and discussed.
 
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