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Alfalfa Management Guide
Authors
Dan Undersander
Extension agronomist, forages University of Wisconsin
Mark Renz
Extension agronomist, weed control University of Wisconsin
Craig Sheaffer
Research agronomist University of Minnesota
Glen Shewmaker
Extension agronomist University of Idaho
Mark Sulc
Extension agronomist
The Ohio State University
Acknowledgments
The authors wish to thank reviewers from industry and various universities for their suggestions and everyone who supplied photos, including those not specifically mentioned:
Steve Bicen, University of Wisconsin anthracnose; aphanomyces, roots; Fusarium wilt, roots; Phytophthora, roots; root assessment; verticillium wilt, root
Dennis Cosgrove, University of Wisconsin autotoxicity
Jim Ducy title page photo
Del Gates, Kansas State University alfalfa weevils
Craig Grau, University of Wisconsin aphanomyces, stunting; bacterial wilt, stunting; black stem, lesions; Fusarium wilt, field; Phytophthora, plant; sclerotinia; stand assessment; verticillium wilt, plants
B. Wolfgang Hoffmann, University of Wisconsin alfalfa plant, page 1; alfalfa flowers
Eric Holub, University of Wisconsin aphanomyces, seedling
Jeffrey S. Jacobsen, Montana State University nutrient deficiencies—all except boron leaf (from Diagnosis of Nutrient Deficiencies in Alfalfa and Wheat)
Pioneer Hi-Bred International, Inc. alfalfa closeups; cover photo ; cow; inside cover
Lanie Rhodes, Ohio State University black stem, leaves; common leaf spot; lepto leaf spot
Marlin E. Rice, Iowa State University alfalfa weevil, blister beetles; clover leaf weevils; grasshopper; pea aphids; plant bug, adults; potato leafhopper, adult; spittlebug; variegated cutworm
Judy A. Thies, USDA-ARS root-lesion nematodes
John Wedberg, University of Wisconsin alfalfa blotch leafminer; clover root curculio, damage
Thanks also to Bruce Gossen and R´eal Michaud, research scientists at Agriculture and Agri-Food Canada, for their contributions to the disease maps.
This publication is a joint effort of: University of Wisconsin-Extension, Cooperative Extension
Minnesota Extension Service, University of Minnesota
Iowa State UniversityCooperative Extension Service
Published by:
American Society of Agronomy, Inc.
Crop Science Society of America, Inc.
Soil Science Society of America, Inc.
© 2015 by American Society of Agronomy, Inc., Crop Science Society of America, Inc., and Soil Science Society