I'm going after the watershield/dollar bonnet in my pond in a few weeks during green up. I ordered some Polaris and methylated seed oil surfactant. I've read the label, but it isn't all that clear to me. I'm trying to spray about 1/2 an acre in a four gallon backpack sprayer. I could bust out my 25 gallon sprayer, but I think the backpack will be easier, if slightly more time consuming, as I will have to get out in john boat to get to some. Thanks.

no one knows? The label isn't per gallon, so it's not that helpful. Thanks.

Instructions for water lily indicate a 1% solution of Polaris which equates to 1.3oz per gallon of water. For some of the other tougher vegetation such as spatterdock, they suggest a 1.5% solution which is 1.9oz per gallon of water. Instructions suggest good even coverage of the floating leaves. I consider water shield a tougher to kill plant so I would use the 1.9oz per gallon rate. Return and let us know how well it worked to kill watershield.