Herbicide Application Timing Definitions

PREPLANT (PP)

Herbicide applied prior to planting that is not incorporated into the soil.

PREPLANT (PP) BURNDOWN

Herbicide applied to cover crop or weeds prior to planting that is not incorporated into the soil.

PREPLANT INCORPORATED (PPI)

Herbicide applied prior to planting that must be incorporated into the soil.

PREEMERGENCE (PRE)

Herbicide applied after seeding but prior to crop emergence from the soil. In horticulture crops (annual and perennial) preemergence herbicides are also known as soil-applied herbicides because they may be applied prior to crop emergence, shortly after emergence or transplanting and after planting for perennial systems (orchards, vineyards).

EARLY POSTEMERGENCE (EPOST)

Herbicide applied shortly after crop emergence or transplanting.

POSTEMERGENCE (POST)

Herbicide applied after crop has emerged from the soil or been transplanted.

POSTEMERGENCE SPOT APPLICATION

Herbicide applied to individual weeds or patches of weeds after crop has emerged from the soil or been transplanted.

POSTEMERGENCE SUCKER CONTROL

Herbicide applied to sucker growth at the base of the crop.

POSTEMERGENCE WICK WIPER AND ROLLER APPLICATION

Herbicide applied with a wick wiper or roller to weeds above the crop canopy.