Morphological Characteristics of Turf Grasses in Response to Trinexapac-Ethyl Application

The aim of this research was to evaluate (lie effects of the sequential application of two rates of trinexapac ethyl on the morphology of the following turf grass species: Broadleaf Carpetgrass (Axonopus compressus), Bahiagrass (Paspalum notatum). St. Augustinegrass (Stenotaphrum secundatum) and Korean Lawngrass (Zoysia japonica). The treatments used were trinexapac ethyl with two sprays applied at 20 day interval at two different rates (56.5 + 56.5 and 113.0 + 113.0 g ha(-1)) and a control without spraying, for each species. The turf grasses were cut at the height of 3 cm, and sprayed after the treatments. Twenty days after the first treatment application, the plots were cut again and the second treatment application was carried out. The experiment was arranged in a completely randomized block design with four replications, Growth reduction was evaluated based oil the height of Hie plants. Inflorescence number and height were weekly evaluated by sampling, carried out in 0.25 m(2) in the center of the plots. Total dry matter was evaluated at the end of the experiment, Ttrinexapac-ethyl application delayed growth and inflorescence emission and did not cause any visual damage to the turf grasses. Trinexapac-ethyl application can reduce the need of cuts for a period. up to 55 (lulls after the second application.