期刊
PLANT DISEASE
卷 93, 期 1, 页码 73-80出版社
AMER PHYTOPATHOLOGICAL SOC
DOI: 10.1094/PDIS-93-1-0073
关键词
Cephalosporium gramineum; Fusarium pseudograminearum; Helgardia herpotrichoides; Pseudocercosporella herpotrichoides; Rhizoctonia solani AG-8; Triticum aestivum
资金
- Oregon Wheat Commission
- USDA-CSREES-Pacific Northwest STEEP II Research Program
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-2 > 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.
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