The biological efficiency of systemic herbicide metribuzin in water dispersible granules (WG) and solution colloid concentrate (SCC) formulations was studied in field experiments. Metribuzin formulation in SCC state was prepared by the addition of a mixture of anionic and non-ionic surfactants and alkoxylated sorbitan esters as specific adjuvants. The ability of herbicide formulation containing Metribuzin in SCC state to provide increases in control of broadleaf and grassy weeds in comparison to WG was observed. The possibility to reduce application rate of Metribuzin from high-dose to low-dose without losing efficacy of weed control was demonstrated.
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