Plant Growth Regulator

A substance which regulates, primarily by reducing or restricting, the activity of plant hormones. The main groups of PGRs are abscisic acid, auxin, cytokinin, ethylene and gibberellin.

  Post Emergent Herbicide

A widely used type of herbicide which controls established vegetation. The modes of action for Post-Emergent Herbicides are either contact or translocated for most turf situations.

  Pre-emergent Herbicide

A type of herbicide which controls weed seedlings prior to emergence of the desirable grass seed, and which has a contact mode of action. Another mode of action for this type of herbicide is residual, which kills weeds as they germinate. This type of residual herbicide would more commonly be used on ornamental shrub beds which will not be disturbed by mechanical operations.

  Pre-Planting Herbicide

Any herbicide which is applied to an area to control weeds before a desirable grass seed is actually sown. This is also called a pre-sowing herbicide.

  Residual Herbicide

A herbicide which is applied to a soil. It will typically kill newly germinating weed seeds.

  Rodenticide

A product for the control of members of the Rodent family, e.g. rats, mice, grey squirrels.

  Translocated Herbicide

A herbicide which is taken into a plant during an active growing period and is transported throughout the plant, typically killing both roots and surface vegetation.

  Weed and Feed

Dual action combined fertiliser and selective herbicide product used to help control weed content within a turfgrass surface in a single application. An example of a professional product is ICL's Sportsmaster Cleanrun Pro Fertiliser, which has an analysis of 14:0:5 plus MCPA plus Mecoprop-P as the selective herbicide active ingredients.

  Weedkiller [2]

A manufactured chemical herbicide which kills weeds in turf as a selective herbicide (e.g. 2,4-D), or in any location as a total non-selective herbicide (e.g. Glyphosate).