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Translocation is the transportation of carbohydrates and other materials throughout the plant to where they are needed. Plants produce carbohydrates in their leaves by photosynthesis and to get this and other nutrients to the parts of the plant where photosynthesis does not take place, translocation is used.

Nutrients are translocated from mature leaves to the sinks such as roots, flowers, young leaves or fruits. This transportation occurs in the living tissue, phloem, throughout the plant in vascular bundles.

Within these bundles is also the xylem; the tissue that carries water and dissolved minerals from root to shoot. The xylem is the primary route used by herbicides to kill weeds, but they also move in the phloem.

Rigby Taylor sells products containing herbicides which are translocated through the plant including:

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