Appendix B. Application Formulas 



The product description usually gives an account of its 

 composition and directions for use. Appendix A shows effective 

 rates of treatment and tables in the text supply data from which 

 needed quantities of herbicides may be determined. They do not 

 allow for interpolation, however. 



The following formulas from Martin et al (1957, p. 12) are 

 repeated for more precise calculations: 



POUNDS -PER-ACRE FORMULAS: MAKING SPRAY SOLUTIONS FOR A PARTICULAR 

 NUMBER OF POUNDS PER ACRE OF ACID EQUIVALENT OR ACTIVE INGREDIENTS: 



Using liquid herbicide: 



The pints needed per 100 gallons of solution = 



wanted lbs, acid equiv. or act, ingr. per acre x 800 



gals, spray per acre x lbs. acid equiv. or act. ingr. in 1 gal. 



Example: If a 2,4-D formulation containing 4 pounds acid 



equivalent per gallon is to be applied at 5 pounds 

 acid equivalent in 120 gallons of solution per 

 acre, the pints needed per 100 gallons of solution 

 are: 



5 X 800 or 8.3 pints 

 120 X 4 



The milliliters needed per gallon of solution = 



wanted lbs, acid equiv. or act, ingred . per acre x 3785 



gals, spray per acre x lbs. acid equiv. or act. ingr. in 1 gal. 



Using solid (dry) herbicide 



The pounds needed per 100 gallons of solution = 

 wanted lbs, acid equiv. or act, ingred. per acre x 100 

 gals, spray per acre x "L acid equiv. or act. ingred. 



Example: If a formulation of Dalapon containing 71% acid equiva- 

 lent is to be sprayed at the rate of 30 pounds acid 

 equivalent in 200 gallons of solution per acre, the 

 pounds of herbicide needed per 100 gallons of solution 

 are: 



30 X 100 or 21.1 pounds 

 200 X .71 



POUNDS -PER- 100-GALLONS FORMULAS: MAKING SPRAY SOLUTIONS WITH A 

 PARTICULAR NUMBER OF POUNDS OF ACID EQUIVALENT OR ACTIVE INGREDIENTS 

 PER 100 GALLONS: 



