In September 2017 brown or black, huge circular sunken necrotic lesions were observed on walnut fruits (Juglans regia L.) in the fruit variety collection of NARIC Research Institute in Érd, Hungary. Similar symptoms were visible on walnut fruits in three other locations of the country in 2018, the disease symptoms occurred diffusely (in orchards of Lengyeltóti, Nagyoroszi) or widely (in orchards of Sarród, Érd). Early symptom stages were observed in June 2018 with small dry spots affecting the surface of the husk. Acervuli were formed on collected fruit samples and orange conidial masses appeared under wet conditions. Conidia were hyaline, unicellular and fusiform, pointed at one or both ends, and measured 11.0-17.6 x 3.8-5.0 µm (n = 100). The fungus was isolated from necrotic tissues and conidial masses on potato dextrose agar (PDA) medium amended with chloramphenicol (25 mg/l). The colonies were white to pink on the upper side and pink with black spots on the reverse. Acervuli formed and produced conidi...

The interest in hazelnut (Corylus avellana L.) cultivation has recently increased in Hungary, it is currently grown on 490 hectares. In August 2021 early powdery mildew symptoms were observed in a ...

Persian walnut (Juglans regia L.) fruit with preharvest anthracnose symptoms, necrotic fruit stalks, and twigs with necrotic buds, and peaks were collected in a Hungarian orchard next to Nágocs, in...