Junction acts both as a fungicide and an antibiotic thus, it controls both diseases such as, fungal leaf spots and fireblight as well. Junction works very well when applied as a preventative spray.Key Diseases Controlled: Bacterial Leaf Spot, Fireblight, Boytris Blight, Fungal Leaf Spot, Scab, Anthracnose (See Label For Full Labelled Pests).