Evaluation of Root RX~R for controlling nematodes in golf greens 2007.

摘要

A golf green in Greenwich, Connecticut was treated to evaluate Root RX. The green was approximately 83 years old and consisted of a mixture of annual bluegrass and creeping bentgrass. Sand top-dressing over the years resulted in approximately 4 in. ofsandy soil. Mechanical analysis of the top 4 in. showed it to be 95% sand, 3.4% silt, and 1.6% clay. USDA criteria classify this soil as a sand. Root RX is a proprietary botanical extract from Juglans niger. The treatment and control were replicated sixtimes (plots were 6 ft x 6 ft) and completely randomized. Root RX was applied with a 2.5 gal watering can at the rate of 28 oz/1,000 sq ft in approximately 55 gal water/1,000 sq ft. Five applications were made on: 5 May, 3 Jun, 8 Jul, 11 Aug and 22 Sep.Soil was sampled by removing 10, 1 x 4 in. soil cores per plot and bulking together. Nematodes were recovered by wet sieving/sugar flotation and identified to genus. Criconemella (ring), Tylenchorhynchus (stunt) and Helicotylenchus (spiral) nematodes were assessed. The data were subjected to analysis of variance.