Diseases in Seed Production
- Stephen C. Alderman,
- William Pfender and
- Cynthia M. Ocamb
In the U.S. Pacific Northwest, the most significant diseases affecting seed production of tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] are fungal diseases, including stem rust, caused by Puccinia graminis (Pers.) subsp. graminicola (Urban), and blind seed, caused by Gloeotinia temulenta (Prill & Delacr.) Wilson, Noble & Gray. Stem rust is an especially destructive foliar disease with potential for significant yield reductions. Blind seed is a disease of the developing seed, characterized by low seed germination. Other important fungal diseases but generally less destructive than rust or blind seed include Fusarium head blight, caused by Fusarium species; ergot, caused by Claviceps purpurea (Fr.:Fr.) Tul.; and leaf spotting diseases, caused by species of Cercosporidium, Dreschlera, Rhynchosporium, and Septoria. In addition, damage to seed stalks from insects or fungi can result in death and subsequent bleached or silvery-white appearance of the seed heads, a condition commonly referred to as silver top. Disease control recommendations, including registered fungicides and application rates, for specific diseases in the Pacific Northwest are available at http://plant-disease.ippc.orst.edu (verified 11 May 2009). Although many other pathogens can infect tall fescue, they have not been found to be troublesome in tall fescue seed production in the Pacific Northwest.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 2009. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 5585 Guilford Road, Madison, WI 53711-5801, USA. Tall Fescue for the Twenty-first Century. H.A. Fribourg, D.B. Hannaway, and C.P. West (ed.)