more... > Plant Disease Clinic > How to Submit a Sample > Submitting Plant Specimens for Diagnosis [Image: Herbaceous speciment with roots wrapped in a plastic bag to retain moisture.] Submitting plant specimens for disease diagnosis is specific for different groups of plants. This is a short guide on proper submission of herbaceous plants, shrubs, trees and turf samples. How To Submit A Sample [Image: Collecting material for disease diagnostic identification.] Submitting a proper sample with as much information as possible is extremely important in diagnosing disease. Collected sample should be mailed immediately to prevent drying and development of secondary pathogens.