Diseases of wheat, oats, barley, Diseases of wheat, oats, barley, and rye diseasesofwheato48boew Year: 1960 60 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR Appearance.—Soil-borne mosaic, fig. 19, can be detected early in the spring by the presence of light green to yellow patches of plants in the fields. Badly diseased fields are patchy or uneven in appearance; patches vary from small areas occu- pied by a few plants to areas 50 feet or more in diameter. The most noticeable signs of yellow mosaic appear when plants begin rapid growth in the spring. However, under cer- tain environmental conditi
Diseases of wheat, oats, barley, Diseases of wheat, oats, barley, and rye diseasesofwheato48boew Year: 1960 60 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR Appearance.—Soil-borne mosaic, fig. 19, can be detected early in the spring by the presence of light green to yellow patches of plants in the fields. Badly diseased fields are patchy or uneven in appearance; patches vary from small areas occu- pied by a few plants to areas 50 feet or more in diameter. The most noticeable signs of yellow mosaic appear when plants begin rapid growth in the spring. However, under cer- tain environmental conditions, symptoms may show on the leaves in the previous fall. When new leaves of diseased plants Fig. mosaic on wheat. Infection of wheat Pjf« y t,his virus results in dwarfing of plants and mottling of leaves. The mottling insls of light green or pale yellowish stripes or blotches which tend to run parallel with the long axis of a leat.
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