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Fungicide Applications Based on Duration of Leaf Wetness Periods to Control Alternaria Leaf Blight of Cantaloup in South Texas. Claude E. Thomas, Research Plant Pathologist, U.S. Department of Agriculture, Agricultural Research Service, Weslaco, TX 78596. Plant Dis. 67:145-147. Accepted for publication 15 June 1982. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1983. DOI: 10.1094/PD-67-145.

Initiation of fungicide applications based on duration of leaf wetness periods to control Alternaria cucumerina on cantaloup was studied in south Texas. Delaying applications until leaf wetness periods were of 8-hr duration gave equivalent control with at least a one-third reduction in the number of applications as currently used based on crop phenology.