The ingredient, a combination of pyraflufen-ethyl and glyphosate, causes visible signs of destruction of the aerial part of the plant within 24 hours by inhibiting the enzymes that drive photosynthesis, while the systemic action of glyphosate completes the kill.
Applied post emergence, Hammer is suited for use between April and September when weeds are actively growing. It is rainfast within six hours and effectively controls annual and perennials weeds including tough brush weeds, bramble and bracken.
The product is registered for use on natural surfaces not intended to bear vegetation, permeable surfaces overlaying soil and to control weeds around ornamental trees and shrubs.
Hammer has been trialled for two years on non-cultivated and industrial land at Scotts' Levington Research Station near Ipswich.