Calibration Guide

Method 1 -CALCULATION (Using Water)
Method 2 - OIL PALM FIELD CALIBRATION (Using Water)

To ensure the maximum benefit is achieved from the Pesticide it is most important that the label instructions are carefully read, and followed. Always read the chemical label before applying pesticides.

Once the choice of equipment has been made it is very important that during its operation the correct quantity of both pesticide and warmer that were previously selected from the label are now applied to the target accurately.

Regardless of the type of equipment it must be maintained correctly( see the following section). After maintenance, a quick check on the output of the mixture will ensure that the operation is carried out according to plan.

There are many methods of calibration, of which three are shown below. The first is the mode accurate, applies to any type of sprayer. hand held or mechanized and should be used when setting up equipment for the first time. The second and third are in-field quick guide to the output of the equipment and very easy to understand and implement.

Method 1 -CALCULATION (Using Water)

STEP 1
Choose a VOLUME OF APPLICATION in Liters per Hectare from the label...... L/HA.
STEP 2

Check the FORWARD SPEED of the sprayer unit

360 / The time (in second) taken to cover 100 meters = FORWARD SPEED km/h

360 / = Kilometers Per Hour

STEP 3

Use the following calculation to identify the size of Spray Nozzle required. Using the figures you have recorded above, place them in the boxes below and complete the calculation as shown

VOLUME OF
APPLICATION
X
FORWARD
SPEED
X
SPRAY
WIDTH
/600
=
NOZZLE
OUTPUT
L/HA
X
KM/H
X
M
/600
=
L/MIN
 
 
 
/600
=
 

 
STEP 4
Check the ST Spray Nozzle Chart. Choose the nozzle of the correct flow rate by matching the flow in liters per minute to the nozzle in the chart.
STEP 5

Using a wrist and a measuring jug set the sprayer to operate at the normal pressure and measure the flow in the jug for one minute with the new nozzle. It should correspond to the figure on the chart for the chosen nozzle.

If the flow is slightly too low/high for a mechanized sprayer to operate, adjust the pressure. For hand held units adjust the width or speed. For larger differences, change the nozzle

Method 2 - OIL PALM FIELD CALIBRATION (Using Water)

The following method will enable you to determine the exact amount of pesticide required to mix each tankful of water

STEP 1
Choose the correct nozzle for your sprayer unit. by referring to the ST Spray Nozzle Chart.
STEP 2
After first rinsing out the sprayer, fill with clean water (e.g. CP16 ) has a 16 liter Capacity.
STEP 3
Proceed to spray the path & circle as in normal practice with the tankful of clean water. After the sprayer is empty, count the circles sprayed
STEP 4

Record the following information :-

Example Only

Tank Capacity
= 16 Liters
Palms per Hectare
= 148 Palms
Total numbers of circles sprayed with One Tank
= 35 Circles

 

STEP 5

Using the figures you have obtained above, place them in the boxes provided below and complete the calculation as shown

NUMBERS OF
PALMS
PER ECTARE
X
TANK
CAPACITY
IN LITRES
X
3.5
/
NUMBER OF CIRCLES SPRAYED
=
VOLUME OF APPLICATION PER HECTARE
Example                
148
X
16
X 3.5 /
35
=
236.8 L/HA.
 
X
 
X 3.5 /
 
 
 
STEP 6

To determine the quantity of pesticide required per tank, read the chemical label and choose the amount of Pesticide according to the label. Place the label recommendation in the box below and complete the following

TANK CAPACITY IN LITRE
X
CHEMICAL DOSE FROM LABEL IN L/HA
/
VOL OF APPLICATION PER HECTARE
=
PESTICIDE DOSE PER TANK IN LITRES
Example                
16
X
2.0
/
236.8
=
0.135
 
X
 
    /