Transcript Calibration and Dosage Mixing

Calibration and
Dosage Calculations
Terms
• Active Ingredient
– Part of pesticide formulation that controls or
kills.
* Calibration
– Steps taken to determine output or delivery
rate of sprayer
* Delivery Rate
– Gallons of liquid that is applied, usually per
acre. A.k.a. - sprayer output – sprayer volume,
application volume
* Carrier
– Added to concentrated pesticide during
manufactuer. Talc, clay, water
* Diluent
–material used to dilute pesticide
concentration at time of appliction - water
* Dose
-A.k.a rate or labeled rate. Amount of
pesticide to apply – per acre
* Field Speed or travel speed
- MPH at which application takes place
* GPA
-Gallons Per Acre – sprayer output – spray
volume
* GPM
- Gallons Per Minute - nozzles
* Labeled Rate
– dose. Pesticide per unit of area to
control a pest.
* Swath Width
- Width of spray pattern as it appears
over target area
* Test Strip
- area used to determine sprayer output
-LxW
RELATIONSHIP BETWEEN TWO THINGS
RATIO
A is to B …as….C is to D
A
B
=
C
D
SMALL
BIG
Common Uses
• 2 Tablespoons Chlorine per 5 gallons of water
• Have 30 gallons to disinfect
2 tblspns
5 gal. H20
5X = (30)(2)
=
X = 60
5
X tblspns .
30 gal. H20
X = 12 tablespoons
One Acre
43,560ft2
Test strip
CALIBRATION
TEST STRIP METHOD
Step 1
Set up a test strip (L x W) = ft2
How much liquid (Gallons)
is applied per strip?
Convert to acres: ft2 x 0.000023
Or
ft2 .
43,560 ft2
Step 2 – Set up a simple ratio
--HAVE-TEST STRIP
--DESIRED-GPA
Test Strip Gallons
Length x2Width
Gallons
43,560 ft2
ft
=
Test Strip Gallons x 43,560
Lengthftx2 width
Test strip = 20 feet x 30 feet
Gallons applied = 0.60 gallons
0.60
0.60 gallons
20 x 30 ft
0.138 acres
= 26,136
600
X 43,560

 20
 30
43.56 OR 44 GPA
600 ft2 x 0.000023 = 0.138 Acres
Test strip = 15 feet x 15 feet
Volume applied = 32 ounces
32 ounces  128 ounces per gallon
= 0.25 gallons
0.25 gallons x 43,560 ft2
225 ft2
=
48.4 or 48 GPA
Test strip = 15 feet x 15 feet
= 225 ft2 = 0.0052 Acres
Volume applied = 0.25 gallons
0.25 gallons
0.0052 acres
= 48.07 or 48 GPA
Find Acres
Volume
GPA
300 gallons
30 GPA
= 10 acres
How much to add
to the tank
Acres x rate
10 Acres x 1 pint per acre
10 pints
1250 – 500
- 500 == 250
Sprayer
capacity
500 gallons
gallons left for last load
250 gallons
= 5 acres x 1 pint per acre.
Acres
25 acres
50
GPAto spray 5=pints
added to 3rd load
Product rate = 1 pint per acre
Sprayer calibration = 50 GPA
How many loads will you need?
1250
????
gallons
.
50 GPA
= 25 Acres
How much
pesticide do you
add to each load?
1st and 2nd load = 500 gallons each = 1000 gallons
500 gallons
50 GPA
= 10 acres x 1 pint per acre.
10 pints added to 1st and 2nd loads
pounds a.i. per acre - Liquid
amount of a.i.
lbs. a.i. per gallon
gallons of
= formulated
product
0.25 lb of a.i. is recommended per acre
0.25 lb a.i
= 0.125 gallons
2 lb a.i. per gallon
AmountDry
a.i. Formulations
= pounds formulated
% a.i. per pound
product
2 lbs a. i. per acre of an 80% WP is prescribed
2 lb a.i.
0.80 lb a.i.
= 2.5 lbs formulated product