Mechanism of action
Clopyralid has a systemic effect, is absorbed by leaves and roots of weed plants, and easily moves accumulating in the growing points and roots. Clopyralid is a synthetic form of natural plant growth hormones that replace natural plant hormones and block their functions. Oversaturation with synthetic hormones leads to disruption of growth processes and plant death. It destroys both the ground part and the root system of weeds, including the buds of renewal and root sprouts of sow thistle.
Imazamox is absorbed by the leaves and root systems of dicotyledonous and grass weeds and moves through the xylem and the phloem accumulating in meristematic tissues. It inhibits the acetolactate synthase enzyme in sensitive plants, which results in the decreased level of amino acids in plant tissues with subsequent disturbance of the synthesis of proteins and nucleic acids. The growth of sensitive weeds ceases several hours after treatment.
Protective effect period
The effect of the herbicide on weed plants lasts from 4 to 8 weeks depending on the climatic and weather conditions.
Rate of exposure
The effect on weed plants is most apparent from 5 to 7 days after treatment of crops and depends on the climatic and weather conditions.
Spectrum of suppressed weeds
Annual grass and annual and perennial dicotyledonous weeds.
Susceptible species: amaranth (spp.), scarlet, goose-foot (spp.), black mustard, shepherd's purse, lamb's quarters, spurge (spp.), wild buckwheat, drug fumitory, Henbit dead-nettle, chamomile (spp.), field scorpion grass, self-seeding poppy, knotweed, lady's thumb, wild radish, black nightshade, chickweed, corn speedwell, bird's-eye speedwell, field pansy, dogs' chamomile, corn chrysanthemum, coltsfoot, clover (spp.), cornflower, mountain bluet, common groundsel, common dandelion, garden vetch, creeping thistle, common ragweed, field sow thistle, creeping thistle, lettuce (spp.), common cocklebur, large crabgrass, cockspur, Panicum miliaceum subsp. ruderale, bristle grass (spp.), Cuba grass.
Moderately susceptible species:
butterweed, cleavers, meadow foxtail grass, wild oat, annual ryegrass, corn pansy.