Ortho GroundClear Year Long Vegetation Killer, 1.33 gal.

If your going to use a wand sprayer make absolutely sure that you put it down at the stem that runs to the roots. This is a very big MUST ! As if you only pass the wand over the tops of the weeds you got a very small chance of getting the roots ! Or use a hose in sprayer and let it mix itself in. It does work better if the soil is moist, so wet down the soil and wait for approximately 30 minutes to 1 hour then spray away. And yes you can mix up a hot batch of 2 gallons just add 1/2 more of product. It will kill all grass and weeds ! Hose sprayers are best on big areas .. this will get the product to the root base. A backpack type sprayer is just like a pump sprayer ! So yes you need to get the base of the stem so it travels down the base to the main root. I'm in farm land and as such all types of weeds are abundant here. I've tried 2,4 -d and it's good for ditches and tall grassy areas. Just think about the mechanics of the weed and the main route that goes down just like a tree except you've got to cut that tree down and then you got to grind the stump down to kill off the roots. I use the concentrate. And just because it didn't work the 1st time next time get the root stem at the base of the weed ! Happy weeding.