Lofgren, John A.2019-09-182019-09-181973https://hdl.handle.net/11299/2068891 online resource (PDF, 2 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.enControlling insect pests of shade and ornamental trees (Revised 1973)Report