Originally Posted By: mrsilv04
Originally Posted By: hr1940
The mixture I use is 4 oz. per gallon of water. I use about 30 to 45 gallons of the mixture to kill the weeds and poison ivy, sumac, etc. In the hot sun it took almost a week to kill poison ivy.
I've noticed that the cheaper "generic" glyphosate products don't tend to work as quickly as Roundup, but they eventually do get the job done.
A good squirt of some Dawn dish detergent in with your 4oz/gallon Roundup mixture will also help the Roundup to do its job.
The Dawn dish soap will act as a surfactant. It allows the Roundup/water mixture to "splatter" onto and "stick" to the leaves and stems of the plants, fighting the tendency to bead up and roll off, as happens with some waxy/oily plants, such as Poison ivy or Cattail.
I've been using a 4oz/gallon mixture of Roundup, with a squirt of Dawn, to kill Cattails. The Cattails have a "waxy" enough of a mostly vertical surface that the Roundup mixture alone would mostly bead up and roll off of the plant otherwise.
There is enough surfactant in round up, really no reason to add any.
Caution on home usage which I believe is no higher than 2% concentrate mixture. I need to retract my statement on the round up usage on the injection and rates. You need a qualified applicator when dealing with home usage. High concentration needs PP protection and only qualified professional with proper training are authorized.
Home usage has some tough standards. I don't use any type of chemicals in my yard, I dig my weeds out and maintain a strong growing environment preventing weed infestations.