June 28, 1919 



HORTICULTURE 



619 



pINOLYPTol 



WEED KILLER 



THE VERT NEWEST AND QUICKEST METHOD OF DESTROYING WEED!, 



GRASS AND OTHER GROWTH IN GARDEN WALES, GUTTERS, 



TENNIS COURTS, DRIVEWAYS, ETC. 



This fluid destroys weeds and other growth wherever applied, and lt» effect on 

 the ground prevents the growth of fresh ones for a year and thus saves i great 

 deal of time and labor, as no cutting, hoeing or hauling away of the weeds U 

 required. 



We manufacture the strongest line of DISINFECTANTS on the market. 



PINO-LYPTOL CHEMICAL CO., 587-509 W. 19th St.. New York 



CORRESPONDENCE SOLICITED. 



WHAT CAUSES "BROWN PATCHES" 

 ON THE LAWN 



Objectionable "brown patches" ap- 

 pear on fine lawns, greenswards, and 

 the putting greens of golf courses 

 usually during the hot, moist weather 

 of summer, the disease being most 

 noticeable when the weather is hot 

 and muggy, and on ground which is 

 kept too moist by insufficient drain- 

 age or heavy sprinkling. The brown 

 spots — caused by a fungus — are at 

 first more or less circular and grow 

 in centrifugal fashion, becoming a 

 foot or more in diameter. 



During the early morning many of 

 the spots are covered with a fine mil- 

 dew. Later in the day the border of 

 actively growing spots is smoky green 

 in color where the grass leaves are 

 dying. When the disease is abundant 

 and a merging of the spots occurs, an 

 entire putting green often will be com- 

 pletely brown and appear as if dead. 

 Peculiarly enough, with the coming of 

 cool weather in fall most of the in- 

 fested spots recover, indicating that 

 the grass has suffered no permanent 

 injury. However, occasional diseased 

 spots are completely killed. Appar- 

 ently the brown spots radiate in the 

 form of a small circle from one unit 

 and continue this pxocess, season after 

 season, until large circles are formed. 

 Occasionally a green spot is found in 

 the center, but usually the whole 

 patch is brown. 



Prevention is the practical way of 

 decreasing the damage wrought by 

 this turf disease, according to the 

 United States Department of Agricul- 

 ture. Preventive measures consist in 

 providing thorough drainage, both of 

 the surface and subsoil. Watering 

 should be done in the morning, in the 

 case of golf courses, the purpose being 

 to have the courses as dry as practi- 

 cable during the night. Often in 

 spite of these precautions the disease 

 will appear in warm, wet weather 

 w r hen the excess surface moisture can 

 not be controlled. The growing of 

 turf plants immune or highly resistant 

 to the disease — Bermuda grass in the 

 South and blue grass and white clover 

 in the North — is the ideal method of 

 prevention, but the last two are not 



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