Question, I understand different calibrating techniques for backpack sprayers eg. measuring out 1000 sq ft ,timing ,pace, how much water used etc. However, when all of this is determined and you know that you will use 1.75 gals of water to apply blanket weed control over an area of 3,500 sq ft. what takes precedence for determining the product ratio. Is it the sq ft area or gallon rate? The label states 1.5 oz per 1,000 sq ft. or 1.5 oz per gallon. The weed control rate 1.5 oz per 1,000 sq ft sq would be to add 6.25 oz of product to 1.75 gal of water for 3,500 sq ft area. The 1.5 oz per gallon rate to 1.75 gallon would be to add 2.62 ( about 1/2 the amt) oz of weed control product for the same area. Leaning toward the 2.62 ratio, am I correct?
liveliner
3.5 times 1.5 is 5.25. This is the ounces needed...when I calculate it.
Now you have to add that to the gallons needed to cover the area.
But it never comes out perfect.
You are better off to mix enough for a few additional sqft. You don't want to come up a few ounces short of fully covering the area.
Take care that you do not walk to fast or too slow.
Best to mark the swath width with shaving cream or soap suds so you keep that consistent. You need a bit of overlap, of course.
Now you have to add that to the gallons needed to cover the area.
But it never comes out perfect.
You are better off to mix enough for a few additional sqft. You don't want to come up a few ounces short of fully covering the area.
Take care that you do not walk to fast or too slow.
Best to mark the swath width with shaving cream or soap suds so you keep that consistent. You need a bit of overlap, of course.
Water is strickly the carrier. In theory, you could add 1.5oz of product to 4 gallons of water and spray that out on 1000sq. ft. In reality, that may be to weak of a solution. You need a happy medium. When I use a backpack, it is normally for spot spraying and will mix my product per gallon. When using my ride on sprayer, I mix at per 1000 sq. ft. I try to use .5 gallon of solution per 1000
Thanks grass4gas & Riggie. I'm new to liquid spraying & sq ft vs gallon rate is a bit confusing. My setup sprays about 64oz (.5gal) per 1,000 ft. Good with that for blanket rate. In my case 1.5 oz per 1,000 for 3,500 sq ft would be 5.25 oz .Again, some labels have different rate for spot. I understand water is the delivery mechanism and the total sq ft of area is the primary consideration for product ratio.
On my ride on I’m at a quart per acre it’s low volume spray same amount of product less h2o
When I am running the hose I like a 2gal per k. That’s just what I like at the speed I want to walk period nothing special about it but I have it calibrated to a T. I always mix for the day with an additional 10% buffer and that has served me well for a decade.
lol yes other wise that really would be an ultra low volume. It’s actually 34oz per k but quart pretty close.
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