Plant symptoms include stunting, shortened internodes and yellowing of the leaves. Reddening of the leaves may be present in certain corn strains. By contrast, MCDV cannot be transmitted by sap inoculation to assay plants but can be transmitted by a certain type of insect. The leafhopper, Graminella nigrifrons , is presumed to be the major vector. Wheat Streak Mosaic Virus.
Streaks elongate and develop parallel to the veins.
Older leaves may become chlorotic near the tips with green margins bordering the veins. Ears may be developed poorly and have poor seed set. Infected mites migrate from wheat fields adjacent to corn. Two leafhopper species, Dalbulus maidis and D. eliminatus , are the principal vectors. These leafhoppers are not native to Missouri, and the occurrence of the disease in Missouri is unlikely.