Synergy Influences of Non-ionic surfactant on Control of Large Patch in Zoysiagrass (Zoysia japonica)

Young-Sun Kim1,2   Chang-Eun Lee3   Geung-Joo Lee4,*   

1Division of Life & Environmental Science (Horticulture Major), College of Natural and Life Sciences, Daegu University, Gyeongsan 38453, Korea
2Institute of Basic Science, Daegu University, Gyeongsan 38453, Korea
3C&L Chemical Co. Ltd., Seoul 03938, Korea
4Department of Horticulture and Department of Smart Agriculture Systems, Chungnam National University, Daejeon 34134, Korea


This study was conducted to evaluate synergy effects of non-ionic surfactant on control of large patch diseases caused by Rhizoctonia solani AG 2-2 (IV) on zoysiagrass with tebuconazole. After applied with surfactant and tebuconazole, control efficacy of large patch in the pot and plot tests was 47.8-52.9% and 94.5-98.8%, respectively. Compared to T treatment, the effects of T+K, T+1/2K, and 1/2T+K treatments on large patch control were not significantly different. These result indicated that the application of tebuconazole fungicide in zoysiagrass was still valid in the control of large patch disease, and the non-ionic surfactant was useful in maintaining the similar disease control effect even with the reduced fungicide application.

Figures & Tables

Fig. 1. Control efficacy of large patch in zoysiagrass after applied with non-ionic surfactant or tebuconazole. Error bars indicates standard deviation and different letters indicates significant different at <.05 level according to Duncan’ s multiple range test. Large patch was investigated on July 10. Treatments were as follows. Control: Non-application, tebuconazole (T; 0.125 a.i. T g m), and mixture treatments of non-ionic surfactant (K) and tebuconazole (T+K, 0.125 a.i. T g m+0.25 K g m; T+1/2K, 0.125 a.i. T g m+0.125 K g m; 1/2T+K, 0.063 a.i. T g m+0.25 K g m). Tebuconazole and mixtures of tebuconazole and non-ionic surfactant were applied three times on June 19, June 26, and July 3.