These experimental results show not only that sugarcane mosaic virus (SCMV) tolerance exists in sweet corn, but also that it is variably expressed in plant and ear characteristics. Virus infection can apparently be expressed independently or collectively in the form of leaf symptoms, in an inability to produce ears of marketable size, and in defects in kernel development on the ears. Some of the hybrids tested showed collectively less defects than others, and should be considered for trial in areas where SCMV infection is prevalent. These are: NCX 200 (Niagara), 70–2109 (Rogers Bros.), Sunshine State (Keystone), and Goldie (Northrup-King). On the basis of very high table quality, past performance, and fairly good tolerance in this experiment, the hybrids Bonanza and Jubilee should also be included in grower trials.

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