Lettuce
Virus Control in Lettuce and Spinach (1988)
Research report from OSU's North Willamette Agricultural Research and Extension Center
Delbert Hemphill
OSU Dept of Horticulture, NWREC
Introduction
Response Of Crisphead Lettuce To Rates Of Nitrogen And Potassium (1988)
Introduction
Seedling Growth Comparison Among Several Greenhouses (1990)
Introduction
Beet Western Yellows Virus Survey (1990)
Research report from OSU's North Willamette Agricultural Research and Extension Center
Delbert Hemphill
OSU Dept of Horticulture, NWREC
Introduction
Screening Lettuce and Spinach Germplasm for Resistance to Beet Western Yellows Virus (1992)
Introduction
Beet western yellows virus (BWYV), an aphid-vectored luteovirus, causes a pronounced, bright yellow color to the leaf margin of lettuce, spinach, and other leafy greens. Interveinal chlorosis may also develop. The virus does not usually stunt growth and is not considered a problem in many susceptible crops. However, where the leaves are harvested or comprise the edible portion of the crop, such as with lettuce, spinach, Chinese cabbage, and root crops sold with the shoots attached, even a slight expression of symptoms can render the crop unmarketable.