October 16, 2018 14:07 Updated Follow If you have a tree that is showing signs of distress, insect damage or disease, your best sources of information are DNR's Division of Entomology (http://www.in.gov/dnr/entomolo/) and Purdue University's Diagnostic Lab (http://www.ppdl.purdue.edu/ppdl/). Related articles I want to construct a pond but don't know where to start, who should I contact? How do I contact the Cabinet? I want to fish and hunt; look for mushrooms; camp; hike on a coal mine. Who do I need to contact? Does Indiana law require me to carry my handgun on my person in a concealed or exposed manner? Who can I contact about mud on the highway or material escaping trucks loaded with coal?