Search results

How to Build Weighted Trailing Hoses

... most contact herbicide s (such as diquat at 370 ppb or endothall at 3 ppm) uniformly throughout the water column . ...

Herbicide Considerations Reference Guide—Introduction

... herbicide may require a dose of 40 ppb for as long as 100-120 days to control hydrilla. Contact time ... to as little as 14 days if penoxsulam is applied at 20 ppb in conjunction with 1-2 ppm of potassium endothall. Plant ...