Abstract
In this study, Manilagrassin theZoysia-groupandTifgreenandTifwayin theCynodon-group, which showed sensitivity to isoxathion in the previous pot test, were tested under field condition in August 1976.
The odtained results were summarized as follows ;
1. Manilagrassdid not show any sensitivity to isoxathion.
2. Tifgreenshowed a little sensitivity (yellowing), but recovered in a few days.
3. Tifwayshowed higher sensitivity thanTifgreen. It srecovery was observed later then that ofTifgreen.
