Barley Yellow Dwarf Luteovirus (BYDV-PAV), Cereal Yellow Dwarf Polerovirus (CYDV-RPV), and unassigned strain RMV, transmitted by the Oat Bird-Cherry Aphid (Rhopalosiphum padi), the English Grain Aphid (Sitobion avenae), the Corn Leaf Aphid (R. maidis) the Greenbug (Schizaphis graminum), plus other species
Time for concern: Planting to harvest
Key characteristics: The most prominent symptom associated with BYDV/CYDV- infected plants are purpling or yellowing along the leaf margins, running the length or both lower and upper leaves. The color involved depends upon the corn variety infected.
Record the occurrence and severity of BYDV/CYDV. No thresholds have been established.
|Resistant varieties||No resistant varieties are available|
|Site selection||Avoid planting spring sweet corn near fall plantings of barley, oats, or wheat. About 150 species of wild grasses in the family Poaceae are susceptible to these viruses. Corn grown under plastic is vulnerable after plastic slitting or removal, as advanced, succulent corn is especially attractive to aphids.|
|Pesticides(s)||Because this virus complex is persistently transmitted (the virus becomes circulative within the aphid), insecticides should be helpful in reducing secondary virus spread. See management options under Corn leaf aphid.|