Weed-control effectiveness of different post-emergence stem and leaf herbicides in first-established turf of buffalograss and their safety evaluations

In order to effectively control weeds and improve the turf-building quality of buffalograss (Buchloe dactyloides), based on an investigation of weed spectrum composition and biological characteristics, the weed control effect and safety of different post-emergence stem herbicides after seedling were compared and analyzed.The results showed that on the 15^th day after application, the highest effectiveness of bentazone and fluoroglycofen-ethyl on broadleaf weeds was 88.76% and 88.30%, respectively, and the highest efficacy of topramezone on gramineous weeds was 90.02%. On the 30^th day, the highest effectiveness of topramezone on broadleaf and gramineous weeds was 97.89% and 89.51%, respectively. Clopyralid had the smallest effect on the growth of buffalograss, with 7.11% inhibition of plant height and 1.6 new stolons, whereas fluroxypr-mepthyl and fenoxaprop-P-ethyl had the largest effect on the growth of buffalograss, with more than 50% inhibition of plant height, and fenoxaprop-P-ethyl severely inhibited the formation of new stolons. Weed control effectiveness and safety for buffalograss were considered, and the topramezone was the most appropriate herbicide for buffalograss.