Peanut Disease Guide
North Carolina and Virginia

CO-AUTHORS:

J. C. WELLS
Extension Specialist and Professor of Plant Pathology
North Carolina State University

P. M. PHIPPS
Extension Specialist and Assistant Professor of Plant Pathology
Virginia Polytechnic Institute and State University

Placed on the Web 2/97 by the Center for Integrated Pest Management

Contents

Introduction Herbicide injury
Diagnosing the Cause of Disease Fungicide injury
Categories of Common Peanut Diseases Genetic abnormality
and Related Problems
 Zinc toxicity
Aspergillus seed decay Botrytis blight
Aspergillus crown rot Southern stem rot
Sclerotium rot Sclerotinia blight
Early leafspot Cylindrocladium black rot
Late leafspot Pythium wilt
Sporulation by leafspot fungi Verticillium wilt
Pepper Spot Rhizoctonia stem rot
Leaf Scorch Rhizoctonia pod rot
Web Blotch Pod rot
Peanut Rust Pythium pod rot
Peanut stunt virus Northern root knot nematode
Tobacco thrips Peanut root knot nematode
Leafhopper burn Ring nematode
Spider mite injury Sting nematode

Acknowledgements:
Information and photographs is this publication were contributed by Extension and Research plant pathologists in Virginia and North Carolina. The authors would like to extend special thanks and recognition to the following people for making their photographs available: D. M. Porter (Figures 5, 8, 21d, 23a, 23b, 24a, 24b, 25, 26, 27, 28); M. K. Beute (Figures 20b, 21c, 22c); A. H. Allison (Figures 3 and 29); S. A. Tolin (Figure 11c); and J. C. Smith (Figure 14).

Published by
THE NORTH CAROLINA AGRICULTURAL EXTENSION SERVICE

9-80-10M
AG 224