This article discusses the study of two of the most important fungal diseases of apple trees, powdery mildew and scab. Scab, which appear annually in apple orchards, causes damage due to crop losses and reduce crop quality (Gessler C, et all, 2006, Parisi L. et all. 2004). Powdery mildew is also present annually in orchards and three nurseries, causing significant crop losses (David A, et all. 2021). The correlation of these two diseases, who is the most common and important diseases in apple orchards, gives us a broader view of the moment to apply treatments and try to synchronize them. The result of the statistical analysis is different for each variety, partly due to the differences in resistance to these diseases of each variety. The greater the correlation, the greater the simultaneous application of treatments for both diseases could be carried out simultaneously, leading to a decrease in production costs. The experiments took place between 2023 and 2025, years with a dry climate, long summers and high temperatures and intense insolation. The location of orchard was Timiș County, Urseni village, in an apple orchard covering an area of 2 hectares. The orchard was established 14 years ago, using certified planting material. The frequency and intensity of the disease were recorded annually and the degree of attack was calculated in three repetitions. The statistical calculation was done with the statistics package in the Microsoft Excel program.

apple scrab, apple powdery mildew, correlation, apple orchard

agronomy

Presentation: poster