Super Sponge Weed Wipers

Weed Wiper FAQ’s

What should I use in my sponge weed wiper?

It is always best to follow the label for wiping applications. Most chemicals can be applied in our sponge wipers. Give us a call to ask about what mix rates have worked well for other growers. If you are using Round-up (Glyphosate)...we highly recommend you do not use any stronger rate than 33%. In most cases 20% works well when used with a good surfactant. You can also add a nonstaining blue die to help you see what weeds have been wiped.

What about Round-up Resistant weeds?

There are now over 20 varieties of Round-up Resistant Weeds if you have resistant weeds like Marestail and Pigweed...using other chemicals like Gramoxone and 2-4-D, through our sponges may be necessary. Gramoxone by Syngenta is labeled for use in Cotton, beans and peanuts in most states at a 50% rate.

For more data and videos on this topic please visit

How do I control flow of chemical to the sponges on a pump fed unit?

Our "Top Crop" pump fed kits use the pump from your sprayer to start and stop flow to the sponges from a holding tank (typically not more than 25 gallons). Wipers use far less chemical than sprayers so a larger tank is not required.

To understand the concept of weed wiping it is important to know that weed wiping is an art not a science. What we mean by this is...every situation will have a different weed infestation level. Some fields may only have patches of weeds and some fields may have more weeds than crops. So there is not a "gallons per acre" recomendation or speed or PSI to run the pump at.

Bottom need to get the maximum amount of product on the weeds without dripping on the crop/grass below. The sponge holds far more product than a rope, canvas, or carpet. But the applicator must watch the sponge when the pump is on to determine when it is full. Then simple turn the pump off until you determine that the sponges are not getting enough on the weeds.

How fast should I drive? It is important to drive around 5 miles per hour and lower the boom to gain maximum coverage without wiping the crop or grass below.

Should I wipe on the front or back of the vehicle?

We have models for both options. The benefits of wiping in front would be that all the weeds will make contact with the sponge and you can easily see how much material is in the sponge. If you have the wiper in the back, the weeds that your tires run over will not be killed. Many people may ask if the chemical can go from the weeds to the tires and then to the plants below…but historically we haven’t seen this happen.

Can I attach the sponge to my current sprayer?

Yes. The sponges can easily attach to any existing sprayer boom and even tie into the nozzle bodies. Each 30” sponge section has a ¼” push to connect fitting to feed chemical into the sponge section. Simply find the closest nozzle body and use TeeJet part # QJ98588-1/4 and then attach a ¼”
poly hose between the nozzle body and the sponge. The sponges are designed to feed evenly when using adequate pressure.

What size pump will I need?

If the model you order doesn’t have a pump included please refer to the following chart

Total Sponge length kits - Minimum GPM pump required

5 ft - 1 GPM

10 ft - 1.8 GPM

15 to 40 ft - 3 GPM

60 ft and longer - Need three 3 GPM (one for each 8-port manifold) or a roller pump or cent./diaphram pump 10 GPM+

Is there any benefit for wiping in two directions?

This is typically not necessary when wiping out grasses but when wiping a broadleaf that has heavy patches…wiping the opposite direction will increase your kill on plant that got “shadowed” on the first pass

What is the benefit of Sponge over Rope, Canvass, and Carpet applicators?

The simple answer is that sponges apply more product directly to the weeds and retain more material that all the other methods of weed wiping. Please don’t just take our word for it. Many third party evaluators and universities have done studies that show this. You can also control/keep the applicator from dripping easier with a sponge wiper.

Although a sponge system may be slightly higher than a rope or canvass, it is significantly less expensive than a carpet roller.

How do I get the most life out of the sponges?

We have been making weed wipers for over 30 years. We encourage you to wash them out well after using them and then store them out of the direct sunlight. You can wipe many acres and get many years of life out of the sponges if they are properly maintained.

Watch videos of farmer testimonies

The sponge weed wiper was developed by a grass seed grower in Oregon in the early 80’s. Since then farmers around the world have relied on sponge wipers to effectively and economically control taller growing weeds with NO DRIFT. Don’t just take our word for it…watch video testimonies at and click on MAN vs WEEDS. Call 800-333-4503 or email [email protected]