Let the Plant CLinic help with your plant problems.
They do 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.
Contact the Plant Clinic for assistance
S-417 Turner Hall, 1102 S.Goodwin Ave.
Urbana, IL 61801
Phone:217-333-0519
http://web.extension.illinois.edu/plantclinic/