Open AccessReaction of Selected Onion Cultigens to Pink Root under Field Conditions in New York
Author(s) -
Peggy Coleman,
L. A. Ellerbrock,
J. W. Lorbeer
Publication year - 1997
Publication title -
plant disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.663
H-Index - 108
eISSN - 1943-7692
pISSN - 0191-2917
DOI - 10.1094/pdis.1997.81.2.138
Subject(s) - biology , cultivar , allium , horticulture , growing season , root rot , botany , agronomy
Levels of pink root, caused by Phoma terrestris, were assessed on onion (Allium cepa) growing in organic soils on farms in three New York counties during 1987 to 1990. Both commercial cultivars and lines from the USDA breeding program (collectively = cultigens) were evaluated for pink root incidence early in the season and for pink root severity later in the season. Onions were infected by P. terrestris as early as 6 to 8 weeks after field seeding. At maturity, portions of the root systems of all onions in all cultivars had turned pink. The cultigens with fewest symptoms were Sweet Sandwich, Keepsweet II, Spartan Banner 80, and inbred line MSU5785B.