Tordon herbicide for control of Japanese bamboo in the Northeastern United States

Bridham, A.M.S.; Schwartzbeck, R.A.

Down Earth 21(1/2): 21-22


Accession: 025996222

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Japanese bamboo (Polygonum cuspidatum) is also known as Mexican bamboo, Japanese fleeceflower and Japanese knotweed. Introduced into the U.S. as an ornamental, it has escaped from cultivation in a number of places, spread rapidly and become an obnoxious weed. As it spreads by tough woody rhizomes 15-20 feet long and is supported by roots that penetrate to depths of 4-6 feet, it is very difficult to control by mechanical methods. An application of tordon 101 or tordon 22K (formulations of 4-amino-3, 5, 6-trichloropicolinic acid) in the form of 1/2 to 1 lb acid equivalent in 100 gallons of water and applied as a foliar or basal spray in June or late summer effects a complete kill. It is translocated readily within the plant and within a year toxic effects to crop plants in the treated areas disappear.