Resistance to the Sorghum Midge in Converted Exotic Sorghum Cultivars1

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Abstract
Sixty sorghum (Sorghum bicolor (L.) Moench) lines selected from the sorghum conversion program were evaluated for midge (Contarinia sorghicola (Coquillett)) damage. Selections from IS 12612C, IS 12666C, and IS 2508C sustained the least damage (<20%), and several other lines also had significantly less damage than the 60 to 100% damage sustained by U.S. cultivars. The implications are that resistance to midge exists among some converted cultivars from the world sorghum collection.

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