# Odessa Herbicide - Calibrate your Spraying Equipment

Failure to Calibrate your spraying equipment **WILL** highly likely result in either turf **DAMAGE** or **POOR** results.

To understand what Calibration is, (and why dilution rates DO NOT work) read on.

**Odessa Herbicide - ****How to Calibrate**

What is Odessa Herbicide’s Mixing Ratio / Dilution rate… there isn’t one. That’s right that was not a typo.

Odessa is a product that requires a set amount of Odessa over a set area. There are no dilution rates, dilution rates do not work… because if 2 people (YOU and ‘John Smith’) were to use the same equipment and do the same dilution rate and John Smith walks twice as quick as YOU then John Smith is under-dosing by half compared to YOU…… or you are double-dosing compared to John Smith.

Therefore, you need to calibrate your equipment, to make sure YOU know what water volume YOU are using over a set area, once YOU know this you can then add the Odessa rate into the water volume that YOU use for the area. Unless YOU know how much water YOU will use over 100 m2 YOU can NEVER get a set amount of Odessa evenly over 100 m2, water is the only carrier you can use to achieve this, so calibration is a MUST.

Let us use Odessa's 1 gram per 100 m2 rate as an example. 1 gram in a convenient amount of water per 100 m2 (using between 2 L to 5 L of water per 100 m2). With Odessa you can choose any water volume between 2 L and 5L for 100 m2. Once you have established YOU spray a certain amount of water over a set area (100 m2), you can then add the 1 gram of Odessa into that volume and spray 1 gram of Odessa evenly over 100 m2. For example, if John Smith sprays at 4.2 L per 100 m2 then John Smith puts 1 gram in 4.2 L of water to spray 100 m2, if YOU spray at 5 L of water per 100 m2 then YOU put 1 gram in 5 L of water to spray 100 m2.

__How to Calibrate Pedestrian Spray Equipment__

Spraying straight water on a concrete area is always best. It shows you how even or uneven you are and shows you how little you need to cover an area well. Your aim should be to simply wet the concrete evenly, DO NOT flood it or make the water run/move, just evenly wet it.

Do a blank run with **JUST WATER** in the sprayer so you can get your walking speed and spray pattern right. Practice on a concrete driveway (or any concrete) with **JUST WATER**, measure out a concrete area of 10 m2 (yes that’s **TEN** square metres - i.e. 5 m x 2 m rectangle area or 3.17 m x 3.17 m square area) to calibrate and practice. This will show you how even or uneven you are actually spraying, once you think you are spraying evenly and correctly let the concrete dry, then spray the 10m2 again with water and time yourself with a stopwatch/iPhone.

For this Example, let’s say it took you ‘24’ seconds (we have made up 24 seconds – don’t use this figure to bypass calibrating your equipment), you then put your spray nozzle into a measuring container (i.e. measuring jug) and you turn it on for the same amount of time, in our example ‘24’ seconds, at the same pressure you just sprayed that 10 m2 of concrete evenly, be sure to maintain the same pressure as you did spraying the 10 m2 of concrete (i.e. maintain hand pumping for pressure with manual pressure units).

Let’s say (for our example) you measure 500 mL of water, so you have used;

500 mL over 10 m2.

Which is 5,000 mL over 100 m2.

Which is 5 L over 100 m2.

[Note: if you have more than one nozzle (i.e. 3 nozzle boom) either measure volume from all 3 nozzles or measure 1 nozzle and multiple by the amount of nozzles.]

So, using our proposed Odessa rate of 1 gram, we would then put 1 gram of Odessa Herbicide into 5 L of water and spray exactly like we just did on the concrete in terms of pressure, wanding pattern and walking speed and we will evenly spray 1 gram of Odessa Herbicide over 100 m2.

This is an example, please DO NOT simply take this as a dilution rate of 1 gram in 5 L of water. To get a result you need to calibrate, if you don’t your weed control will be limited and or overdosing can lead to turf damage.

If an end-user reads the Odessa directions for use and says, “right the dilution rate / mixing rate is 1 grams in 5 L of water per 100 m2 – because that’s what it says!”, and they go physically apply 12.5 L of water (dilution) per 100 m2 then they will have actually applied Odessa at 2.5 times the 1 gram per 100 m2 rate. This is when turf damage can occur. Furthermore, if they mix at a dilution rate they think is right based on Zero calibration they can also underdose which will lead to poor weed control.

If you are not getting a result or getting damage you are applying these products incorrectly. Turf Culture’s products require a ‘**set amount of product**’ over a ‘**set area**’ in a ‘**specified amount of water**’. YOU need to achieve and know the water volume within the **specified amount of water** by how you spray with YOUR spraying equipment. Water is your only carrier and vehicle to apply these products, without knowing the water volume YOU spray per 100 m2, YOU can never achieve a ‘product rate’ evenly over 100m2 (or your desired area).

**SPOT SPRAYING**

Without calibrating your equipment when you spray an area you are almost guaranteed to be either over-dosing or under-dosing, you will never know. Hence without calibrating your equipment when spot spraying you are well and truly DOOMED.

By simply turning a sprayer on and off whilst NOT moving the nozzle (NOT wanding back and forth evenly over an area) gives overdosing and will guarantee turf DAMAGE. Spot spraying can only work after calibration.**First** - Calibrate.**Second** - Imagine each single weed (or small group of weeds) are in the middle of a 1 or 2 metre squared area, spray over that 1 or 2 metre squared area just as you did when calibrating on concrete.

**© Copyright - Turf Culture**

Odessa Herbicide

Active Constituent: 100 g/kg IODOSULFURON-METHYL-SODIUM

For Post-Emergent Control of Certain Broadleaf and Grass Weeds in Turf.

APVMA Approval No.: 86481

For more information:PRESS HERE