Diversity and Fungicide Sensitivity of Colletotrichum spp. Causing Apple Bitter Rot and Glomerella Leaf Spot in Northwestern Italy
Apple bitter rot (ABR) and Glomerella leaf spot (GLS), caused by Colletotrichum spp., have recently become an increasing concern in most Italian apple-growing areas. Surveys were conducted between 2023 and 2025 in 28 commercial apple orchards in Piedmont, Northwestern Italy, to investigate the occurrence and diversity...