Abstract
Field trials were conducted at Exp. Farm of Tohoku univ., Naruko, Japan in 1997 to examine the effects of porous hydrate calcium silicate (PS) on the wear resistance, insect resistance and disease tolerance of turf grass using a new turf grass cultivar "Miyako". Silica content of Miyako leaves treated with PS 100 and 300g/m^2 increased by 18 and 26%, respectively, compared to that of the control. With the application of 300 g/m^2 PS, tractions of turf leaves at 4 cm and 6 cm height, indicators of wear resistance, significantly (P<0.05) increased by 7.0% and by 9.0%, respectively, compared to that of the control. With PS 300 g/m^2 treatment, feeding amount of turf leaves by Rusidriaa depravata BUTLER larvae significantly decreased by 41% (P<0.05) compared to that of the control. Degrees of disease severity affected with the brown large patch (Rhizoctonia solani) tended to be reduced by PS application. In conclusion, porous hydrate calcium silicate is an effective material for improving the wear resistance, insect resistance and disease tolerance of turf grass "Miyako".
