Forest Insect and Disease ReportThe Department, 1979 - Forest insects |
Contents
SPECIAL PROJECTS | 1 |
Yellowheaded Spruce Sawfly | 9 |
Eastern Tent Caterpillar | 16 |
1 other sections not shown
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3rd instar acres aspen Becker County Beltrami County black spruce Carlton County CASS CROW WING causing CLAY WILKIN TRAVERSE County Section dieback Diplodia drought Duluth Dutch elm disease early larval egg mass survey feeding damage foliage forest tent caterpillar growing season heavy defoliation HUBBARD CASS Hubbard County infected insect and disease instar instar larvae jack pine jack pine budworm July June KANABEC PINE kill Koochiching LAKE WATER MAHNOMEN larvae larvae ranged Louis County MAHNOMEN CLAY WILKIN maple MARSHALL POLK NORMAN MILLE LACS SHERBURNE Minnesota mistletoe MORRISON BENTON nematode numbers oak mortality oak wilt OTTERTAIL GRANT DOUGLAS Outlook for 1980 Park Phenological Notes planted plots population levels ppm TCA Range 30W RED LAKE WATER red pine samples seedlings shelterbelts shoestring root rot southern Hubbard County STONE BECKER OTTERTAIL tion TRAVERSE BIG STONE two-lined chestnut borer Wadena County WADENA TODD WATER MAHNOMEN CLAY white spruce WILKIN TRAVERSE BIG Woods County