The importance of turfgrass on airports, athletic fields, cemeteries, church grounds, golf courses, industrial lawns, parks, roadsides and school grounds has become well recognized in modern agriculture. These areas cover an estimated 13,450,100 acres in the United States. A total of $2,892,800,000 is spent annually for growing and maintaining the grass i n these locations. Turf managers and homeowners also spend over $80,000,000 for pest killers and buy 4,000,000 power mowers every year. Fine turf is a valuable landscape commodity and compares in economic importance with our major field crops.