How to use Prodiamine 65 WDG

Are conversant with how to use prodiamine 65 WDG? Do you have little or no knowledge on how to use it? Really small granules that dissolve in water and it’s meant to be spread with a tank sprayer before you do this, you need to know the square footage of your yard. I’ll link it in the description. You also need to calibrate your spreader.


Note: Before proceeding, ensure you do not graze, feed livestock, or allow kids to play on areas where prodiamine 65 WDG is applied.


Required Items to Use Prodiamine 65 WDG

You are going to need a few items to use prodiamine 65 WDG appropriately, So what you’re gonna need;

  • The product itself (prodiamine 65 WDG).
  • You going to need some type of marking die to know where you’re placing this product.
  • You’re going to need a scale.
  • You need some type of measuring cup.

I highly recommend you read the directions front-to-back know your grass type and know how much of a yearly limit you’re allowed to apply for your grass type. So looking at this label right now you can see already it can be a little confusing because the product is listed to get a certain amount of control.


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How to use Prodiamine 65 WDG
Prodiamine 65 WDG


Prodiamine 65 WDG Calculation

You have to apply it in pounds per acre GE, it is pretty easy and simple to change that over. So before you use a product, you need to know how much to put down and to know how much you got to put down you need to translate the pounds per acre to ounces 4,000 square feet.

So I will pretty much have this perverted for you. But before you start the calculations, you need to know the definites the constant is 1 acre equals 43,560.

160 square feet and 1 pound equal 16 ounces, if you know all this you can convert it easily by using an online calculator. So before I go on, I want you to know this is not for beginners.

I mean, yes, it can be done by beginners, but it’s more preferable for moderate to advanced users. So if you need to put down a pre-emergent, I would recommend you work on getting your required items down for now until you get more.

You will be so comfortable with this, so I’m going to use myself as an example today. Well, if I know one pound equals 16 ounces, I have to convert 16 ounces. So I tend to 16 ounces dividing into 43.56, which equals 0.367 ounces per thousand square feet. I’ll go looking for five months of control.

I have to put down 1 pound per acre. I have to know the constant. The constant is 1 acre equals 43,560 square feet and we know 1 pound equals 16 ounces. So as to convert the pounds per acre, we know 1 pound equals 16 ounces. So, I prefer that to ounces per square foot.

Take 16 divided into 42.56 which equals? 0.375 ounces per square foot. So throughout, if I want to get 3 months of control. I would need 0.5 pounds per acre when the constant is 1 acre equals 43,560 square foot and I know 1 pound could be 16 ounces or half that is 1 pound is 8 ounces. So I would take the 8 ounces divided into 43.56.

This will give me 0.183 ounces per square foot, so you can see why calibrating your sprayer is very important because you need to know how much your sprayers putting out.


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Steps Taken to Use a Sprayer

Step 1: Also, the first step in the process is to fill your spray with water filled up about halfway. It should be good enough.

Step 2: You want to take the scale and place the cup on a scale, but you need to see through the cup just to take out proper reading. We are going to come after that.

Step 3: You turn in your product. I’m looking to get five months as control. So I need 0.367 ounces per thousand square feet. Why? No, my sprayer gives 2 gallons per thousand square foot and I have a 4-gallon sprayer. So I’m going to double this dosage. I’m going to take the 0.367 ounces to multiply it by 2 that will give me 0.734 ounces. They are calibrated to 2 gallons per thousand square feet. I’m only able to treat 2,000 square feet at a time.

Step 4: After you weigh your product, you put it in the tank sprayer.

Step 5:  You want to mix it really well, then you’ll fill it up with the rest of the water.

Step 6: Use the mark you made but this is optional but if you choose not to use the marking and you put prodiamine itself, it will put out a yellowish color, which you won’t be able to see but depending on which way the sun is shining. You may still not be able to see it very well.

I prefer using the green mark and it doesn’t hurt anything, it’ll go away in a few days or after heavy rainfall.

Note: Applying prodiamine 65 WDG can be messy so you need to make sure you wear gloves.


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During our recent Spider elimination using the prodiamine 65 WDG, about 1 an ounce per gallon of the mark was used and the beauty about it is that you can see where you’re applying it.

What I like about the mark is, once you apply it you’ll get a nice evergreen color throughout the lawn which will last for a couple of days. You apply this with the mark and I advised use it as your guide and just keep going at a comfortable pace that you’re calibrating to rinse and repeat and do the same step over again until you’re done. Remember as you are applying give the back-sprayer a shake just a little bit. It looks silly but it helps maintain concentration.

Do you now know how to use prodiamine 65 WDG? Are you ready to use it? Feel free to share your experience carrying out this experiment, however, contact us for further assistance.

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