Originally Posted by Skipster
I'm not sure that your 3 gal/M carrier volume does much to move any product into the soil. To cover an acre in a half-inch of water takes 13,577 gallons. Assuming equal amounts of solids and voids in soil (not always an accurate assumption, I know), it would take 6,788.5 gallons of water per acre to move your PRE treatment a half-inch into the soil. Your carrier volume applies only 130.68 gal/A moves the product only 0.005 inches into the soil. Knowing that a heavy dew only adds a gallon to two to an acre, we can see that neither carrier volume nor dew contribute in any meaningful way to moving the PRE into the soil.
All that aside, I don't think that not getting water on this application is going to make it a total disaster. I've had many customers over the years that didn't water in their app and didn't get any rain, but still had fewer weeds than their neighbors. Sure, getting it watered in is the best scenario, and I think it's not too late to begin watering now.
You'll notice better control in the areas that don't have much weed pressure (thick, healthy lawn, not too wet nor too dry, right amount of sun or shade for what you're growing), but you'll have some weed breakthroughs (maybe not bad, but I think there would be some) in the areas that are more prone to weed problems (thin grass, overly shady or sunny, excessively wet or dry).
Can you break that down to gallons per M?