tar 58 Super (2,4-D Amine Salt 58% SL) and Star 58 are the selective, systemic weedicides of Phenoxyacetic group.

Star 58 is used on a wide variety of terrestrial and aquatic broadleaf weeds. It has little effect on grasses. It appears to work by causing uncontrolled cell division in vascular tissue. Abnormal increases in cell wall plasticity, biosynthesis of proteins, and production of ethylene occur in plant tissues following exposure, and these processes are responsible for uncontrolled cell division. The ester forms of 2, 4-D penetrate foliage, whereas plant roots absorb the salt forms. 2, 4-D appears to be similar in action to other auxin-type herbicides. .It is absorbed by the leaves and roots and translocated in to the weed plants.