Alternaria Leaf Spot


Angular leaf spot seen on plants can be caused by several bacteria that survive in seeds and plant debris, Symptoms first appear as small, water-soaked spots on leaves, but spread rapidly when conditions are moist and temperatures are between 75 and 82 degrees F. Spots will expand until they fill the entire area between leaf veins, but do not cross over, creating a angular appearance on larger leaves. Older spots may dry out and tear, leaving holes behind.