Does Spray Coverage Influence Fungicide Efficacy Against Dollar Spot?
P. Vincelli and E. Dixon
December 2007
Research
The objective of this study was to test the hypothesis that achieving complete spray coverage with fungicide provides more consistent control of dollar spot than incomplete spray coverage. The authors tested this hypothesis using a contact fungicide as well as a systemic fungicide. Chlorothalonil and myclobutanil were applied separately to creeping bentgrass using two sets of nozzles: two low-drift nozzles that provided incomplete coverage, and two nozzles that provided nearly complete coverage. The results support the hypothesis that achieving complete spray coverage with fungicide provides more consistent control of dollar spot than incomplete spray coverage.
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