Evaluation of Novel Fungicide Products for Control of Botrytis Leaf Blight and Stemphylium Leaf Blight in Onion in Oswego, New York, 2025
Botrytis leaf blight (BLB) and Stemphylium leaf blight (SLB), caused by Botrytis squamosa and Stemphylium vesicarium, respectively, are common leaf diseases of dry bulb onion ( Allium cepa) in the ‘muck’ soil production regions of New York. These diseases cause leaf spotting and leaf dieback that may reduce bulb size a...