Evaluation and comparison of postemergence herbicide applications for goosegrass control in rough turf

摘要

A small plot field experiment was conducted at the City of Honolulu Waipio Soccer Complex. Common bermudagrass turfgrass infested with goosegrass (Eleusine indica) and lovegrass (Eragrostis pectinaced) was mowed twice weekly at a height of 1.5 inchesand sprinkler irrigated daily. Experimental plots measured 6 ft by 10 ft and replicated 4 times in a randomized complete block design. The treated area was 5 ft wide with a 1 ft buffer between adjacent plots. A C02 backpack sprayer was equipped with a hand-held boom with 3 flat fan 8004 nozzles spaced 20 inches apart. The sprays were applied in 46 gpa water delivered at 20 psi. The initial sprays were applied on 13 August 2012. A sequential application scheduled for 2 weeks after the first application for one treatment was actually made on 06 September at 23 days after the first application. The sequential application of sprays made when adequate regrowth occurred was sprayed on 13 September at 31 days after the first application. Goosegrass control was effective for 2 to 3 weeks following applications of thiencarbazone plus foramsulfuron plus halosulfuron. The addition of MSO or sulfentrazone improved efficacy of the pre-mix product compared to the addition of NIS.