Avoid weekend lay overs. Include completed Plant Clinic Specimen data form and Fee with each sample submitted. Diagnoses and recommended controls by the University of Illinois Plant Clinic are based solely on the material and information submitted. The less representative the sample, and the less complete the information provided, the greater the chance for misdiagnosis. Leaf - Collect early and late stages of infection.
Press leaves between heavy paper or cardboard.
Fleshy Plant Parts - Samples with a rot disease should not be sent in an advanced stage of decay. Collect fresh specimens with early symptom development. Wrap in newspaper. Canker - Select recently produced cankers. Dig, do not pull plants from the soil so diseased roots will remain intact.