chapter 17

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Author:
tmp1978
ID:
128464
Filename:
chapter 17
Updated:
2012-01-17 17:05:39
Tags:
pesticides
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Description:
calculations for mixing pesticides
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  1. why is it so important to add the correct amount of pesticide to the mix?
    too little may result in poor results, too much in crop injury, illegal residues or unnecessary expense.
  2. if your recommendations call for 3 pounds of wettable powder per 100 gallons of finish spray, how much do you put in a 450 gallon tank? show ur calculations.
    13.5 pounds. 4.5 x 3 = 13.5 pounds.
  3. how much do u put in a 80 gallon tank at 3 pounds per 100 gallons?
    • 2.4 pounds in 80 gallons. 3 pounds= 3 x 16 ounces= 48 ounces
    • 80 gallons is 80/100 gallons = 4/5
    • 4/5 x 48/1 = 192/5 = 38.4 ounces
  4. if the label says mix 3 pints per 100 gallons of an emulsifiable concentrate, how much do u put in a 300 gallon tank? how much do u put in a 50 gallon tank?
    • answer = 9 pints or 1 gallon n 1 pint in 100 gallons.
    • answer=1 1/2 pints in 50 gallons.
  5. if 1 pound of WP is recommended per 100 gallons of water, how many tablespoons of WP would u add to 1 gallon?
    1 tablespoon.
  6. if 2 pints of EC r recommended per 100 gallons of water,how many teaspoons of EC would u add to 1 gallon?
    2 teaspoons.
  7. how much does 100 gallons of water weigh?
    100 gallons of kerosene?
    • 100 gallons of water weighs 830 pounds.
    • 100 gallons of kerosene weighs 660 pounds.
  8. how many gallons of 25% emulsifiable concentrate would u add to a 50 gallon tank to get to 1% mixture?
    • answer = 2 gallons of pesticide.
    • 1% = 24 parts of water to 1 part of pesticide.
    • 1% = 24 gallons of water to 1 gallon of pesticide---25 gallons
    • 50 gallons 1% mixture = 2 x 24 gallons water = 48 gallons of water
    • 2 x 1 gallon pesticide = 2 gallons of pesticide.
  9. how many pounds of 25% wettable powder must u add to 100 gallons of water to get a 1% active ingredent mixture?
    • answer = 33.2 pounds.
    • 100 gal =830 pounds = 1% of 830 = 8.3 pounds active ingredent needed.
    • 1 pound active ingredent = 4 pounds 25% wettable powder.
    • 4 x 8.3 = 33.2 pounds 25% wettable powder.

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