Forest Health Conditions in Ontario, 2011 Forest Health Conditions in Ontario, 2011 Edited by: T.A. Scarr1, K.L. Ryall2, and P. Hodge3 1 Ontario Ministry of Natural Resources, Forests Branch, Forest Health & Silviculture Section, Sault Ste. Marie, ON 2 Natural Resources Canada, Canadian Forest Service, Great Lakes Forestry Centre, Sault Ste. Marie, ON 3 Ontario Ministry of Natural Resources, Science and Information Branch, Inventory, Monitoring and Assessment Section, Sault Ste. Marie, ON © 2012, Queen’s Printer for Ontario For more information on forest health in Ontario visit the Ontario Ministry of Natural Resources website: www.ontario.ca/foresthealth You can also visit the Canadian Forest Service website: www.glfc.cfs.nrcan.gc.ca Telephone inquiries can be directed to the Natural Resources Information Centre: English/Français: 1-800-667-1940 Email:
[email protected] 52095 ISSN 1913-6164 (print) ISBN 978-1-4435-8489-0 (2011 ed., print) ISSN 1913-617X (online) ISBN 978-1-4435-8490-6 (2011 ed., pdf) Front Cover Photos: Circular photos top to bottom – Diplodia tip blight (W. Byman), Snow damage (S. Young), Emerald ash borer galleries (P.Hodge), Spruce budworm (W. Byman), Forestry workshop in Algonquin Park (P.Hodge). Background: Severe defoliation caused by forest tent caterpillar in Bancroft District (P. Hodge). Banner: Hardwood forest in autumn (P.Hodge). Forest Health Conditions in Ontario, 2011 Dedication We are proud to dedicate this report to the memory of our friend, colleague, and mentor, Dr. Peter de Groot, 1954-2010. Peter was a long-time supporter of forest health, forest entomology, and forest management in Ontario and Canada.