What is Oak Anthracnose?
Oak Anthracnose is a fungus called Apiognomonia quercina that attacks a variety of oak species. Like other fungi, this normally infects in the trees during cool, wet springs, especially when the moisture is prolonged. How do I know if my Oaks have Anthracnose? The signs begin with blotches on the young leaves. These typically appear along the midrib and main veins of the leaf. These turn to larger, tan to brown spots with some leaf shriveling possible. As the leaves mature, they tend to be more resistant and the infection spreads less, although there may be premature leaf drop if the infection is bad. The fungus itself can sometimes be seen as tiny black spots on the undersides of the leaves. Oak Anthracnose normally does not affect the twigs as much. The infections tend to serve just as overwintering sites. There can be, however, some twig dieback if the infection is bad enough. What Can I do to Control Oak Anthracnose? One of the most important methods of control is to keep the leave