chemical treatment to control surviving plants or patches of grass. Spot spraying with 

 dalapon at 1/4 pound per gallon of water or TCA at 1/4 to 1/2 pound about once a 

 month during the growing season will effectively control small patches of Johnson grass 

 or Bermuda grass in cotton, corn, sorghum, or other row crops. Aromatic oils and 

 dinitro -fortified fuel oils can also be effectively used in the same manner. Damage to 

 crops in the treated areas usually will not exceed that caused by hand hoeing heavy 

 weed infestations. 



On ditchbanks and roadsides, in fence rows, and on other noncultivated areas, soil 

 sterilant chemicals provide effective means of controlling Bermuda grass, Johnson 

 grass, quackgrass, canary grass, reed grasses. Para grass, nutgrasses, and other 

 grasses or sedges. The urea compounds, such as monuron, diuron, and fenuron, at 20 

 to 80 pounds per acre usually give excellent control of these species when adequate 

 precipitation connes following application. These weeds usually are not controlled at or 

 below the waterline along drainage and irrigation canals. Sodium chlorate at 4 to 10 

 pounds per square rod and borax at 20 to 40 pounds are also effective in many situa- 

 tions. 



Single or repeated applications of TCA at 80 to 160 pounds per acre as a soil treat- 

 ment and dalapon at 10 to 40 pounds per acre as a foliage treatment are effective on 

 most perennial grasses in southern, eastern, and north-central regions. These chennl- 

 cals are effective on Johnson grass In the Southwest but are less effective on quack- 

 grass In the Western Intermountaln States, perhaps because of highly alkaline soils. 



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