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Water and Temperature Parameters Associated with Winter Wheat Diseases Caused by Soilborne Pathogens.
- Source :
-
Plant Disease . Jan2009, Vol. 93 Issue 1, p73-80. 8p. 4 Charts. - Publication Year :
- 2009
-
Abstract
- Wheat in eastern Oregon is produced mostly as a 2-year rotation of winter wheat and summer fallow. Maximum agronomic yield potential is expected with early September planting dates but actual yields are generally highest for plantings made in mid-October. Field experiments with sequential planting dates from early September to December were performed over 4 years. Associations among yield, disease incidence, and 19 moisture and temperature parameters were evaluated. Incidence of Cephalosporium stripe, crown rot, eyespot, and take-all decreased as planting was delayed. Crown rot and eyespot were negatively correlated more significantly and more frequently with temperature than moisture parameters, and take-all was more associated with moisture than temperature. Rhizoctonia root rot was unrelated to planting date and climatic parameters. Crown rot was identified most frequently (4 of 5 tests) as an important contributor to yield suppression but yield was most closely associated (R[sup2] > 0.96) with effects from a single disease in only two of five location-year tests. Yield was most related to combinations of diseases in three of five tests, complicating development of disease modules for wheat growth-simulation models. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01912917
- Volume :
- 93
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Plant Disease
- Publication Type :
- Academic Journal
- Accession number :
- 36313702
- Full Text :
- https://doi.org/10.1094/PDIS-93-1-0073