• Clopyralid (Lontrel) Behavaran

• A systemic and selective herbicide used for controlling broadleaf weeds in rapeseed (canola) and sugar beet fields.

Mode of Action

• Clopyralid is a systemic and selective herbicide from the pyridine carboxylic acid group and acts as a synthetic auxin that disrupts cell division. It is absorbed through both leaves and roots and is translocated throughout the plant. Symptoms of action include abnormal growth, twisting, bending, swelling and wilting of stems and petioles, chlorosis, and cupping of leaves.

Uses

• In other countries, clopyralid is used to control annual and perennial broadleaf weeds from families such as Asteraceae, Polygonaceae, Leguminosae, and Apiaceae in crops including sugar beet, rapeseed, corn, cereals such as wheat, oats, and barley, mustard, onion, celery, strawberry, ornamental plants, and pastures.
  Application in rapeseed is carried out at the 2–6 leaf stage, and in sugar beet from the cotyledon stage up to the 8-leaf stage.

  The best time to control Canada thistle is before bud emergence. Rainfall occurring 4–6 hours after spraying does not affect herbicide performance. High doses may cause leaf twisting in sugar beet. Potato, chickpea, bean, alfalfa, sunflower, and lettuce are sensitive to this herbicide, and these crops should not be planted for up to one year after the use of Lontrel.