CAHNRS > Hortsense > Tree Fruits > Tree Fruits (Walnut) Tree Fruits (Walnut) Diseases Walnut: Anthracnose (Blotch) Walnut: Blackline Walnut: Blight Walnut: Thousand cankers disease Insects Walnut: European fruit lecanium Walnut: Walnut aphid Walnut: Walnut blister mite Walnut: Walnut husk fly Walnut: Walnut twig beetle Tree Fruits Apple Apricot Cherry Filbert Peach Pear Plum/Prune Walnut