Disease and related disorder management

The Effect of Floating Row Covers on Virus Transmission and Yield of Potato Seed Stock (1990)

Research report from OSU's North Willamette Research and Extension Center

Delbert Hemphill and Gary Reed
Oregon State University


Control of virus-vectoring aphids is essential in potato seed production to exclude viruses such as potato virus Y (PVY) and leaf roll. Floating row covers might protect plants from insect attack, reducing the need for insecticides.

Screening Lettuce and Spinach Germplasm for Resistance to Beet Western Yellows Virus (1992)


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.