Abstract
`Silver Queen' (white) and `Bonanza' (yellow) sweet corn were each planted in blocks of 5-14 ha twice a week from 4 March to the end of April in Alachua County, Fla. Each planting was sprayed with parathion-methyl parathion an average of 20 times/season. The corn in each planting was sampled immediately before harvest for damage to the ears by the corn earworm, Heliothis zea (Boddie), and the fall armyworm, Spodoptera frugiperda (J. E. Smith). `Silver Queen' had <8% ear damage in all plantings made before 12 April, but damage to ears in plantings made the last 2 weeks in April ranged from 12 to 60%. `Bonanza' sustained < 2% ear damage throughout the growing season. The sampling procedure enabled the grower to selectively market his corn based upon standard grades of which worm damage is a significant factor.
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