Additional pests and problems that may affect this plant:
Walnut anthracnose often causes earlyleaf fall and so spoils fall color. Difficult to transplant due to deep taproot.
The roots of black walnut produce a chemical, juglone, that can be toxic to certain plants.
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Illinois Commercial Landscape and Turfgrass Pest Management Handbook The Illinois Commercial Landscape and Turfgrass Pest Management Handbook (ICLT) is written for professional applicators and provides nonchemical and current chemical recommendations as well as application timing information for all major pests of turf, woody ornamentals and herbaceous ornamentals. This publication may be purchased at your local University of Illinois Extension Unit office, or by calling 800-345-6087, or by placing an order online (search for "ICLT"). Visit site >>
U of IL - Distance Diagnosis through Digital Imaging A free plant, weed, insect and disease identification service available through your local University of Illinois Extension office. Center Educators or State Specialists review & respond to information and digital images submitted by local Extension office personnel. Some samples may require further examination or culture work (nominal fee involved) at the U of IL Plant Clinic. Visit site >>
U of IL - Plant Clinic Services include plant and insect identification, diagnosis of disease, insect, weed and chemical injury (chemical injury on field crops only), nematode assays, and help with nutrient related problems, as well as recommendations involving these diagnoses. Microscopic examinations, laboratory culturing, virus assays, and nematode assays are some of the techniques used in the clinic. Visit site >>