Mode of action
Prometryn inhibits the Hill reaction and suppresses photosynthesis in sensitive weeds, which leads to their death. With the preemergent application, the herbicide destroys the weeds at the time of their germination by absorbing from the soil by roots and sprouts. The product acts on the sprouted weeds through the leaves.
Period of protective effect
30 to 80 days. The duration of the product action depends on soil moisture, weather conditions, and the species composition of weeds.
Rate of exposure
The product effect starts 2-4 days after the emergence of weeds, with their complete death seen in 7 to 12 days.
Action spectrum
Annual dicotyledons and grass weeds
Susceptible species: little-flower quickweed, hedge mustard, common fumitory, chickweed, common arache, field poppy, lamb's quarters, horseweed, shepherd's purse, field pansy, cornflower, large crabgrass, speedwell (species), field mustard, small nettle, thorn apple, common cocklebur, yellow foxtail and green foxtail, red-root amaranth, corn spurry, common groundsel, field milk thistle, pimpernel (species).
Moderately susceptible species: ragweed, black bindweed, treacle mustard, stinging nettle, black nightshade, hemp-nettle (species), wild radish, knotweed, pale persicaria, barnyard grass, wild oat, common purslane, chamomile and scentless mayweed, field pennycress, cleavers, black grass.
Low susceptible species: annual bluegrass, corn chamomile, purple dead-nettle, creeping thistle, field vetch.
