Efficacy of fungicides for control of brown patch of creeping bentgrass on a sand-based green, 2010.

摘要

The test was conducted on a sand-based green located at the University of Kentucky Turf Research Center near Lexington. The turf was maintained at a 0.188-in. mowing height, and fertilized with 18-9-18 at the rate of 1.5 lb N/1,000 sq ft on 6 Oct 09,and 1.0 lb N/1,000 sq ft on 12 Apr 10, and 1.0 lb N/1,000 sq ft onl 6 Jun 10 to promote brown patch development. Irrigation was applied twice daily to promote brown patch development beginning 16 Jun 10. Plots measured 3 ft x 3 ft with 1.5-ft borders, and were arranged in a randomized complete block design with three replications. Fungicide sprays were applied using a C02-pressurized hand-held sprayer fitted with Spraying Systems 8003E flat-fan nozzles delivering 1.5 gal/1,000 sq ft. Treatments were first applied on 5 May, before brown patch was observed, with remaining applications made thereafter according to the schedules indicated in the tables (final application on 12 Aug).