NAPHTHENATE AND CYCLOHEXANECARBOXYLATE TREATMENT PROTECTS PHASEOLUS VULGARIS FROM EFFECTS OF 2,4-DICHLOROPHENOXYACETATE

Abstract

In three experiments, 14-day-old plants of bean Phaseolus vulgaris L., treated to the runoff point with an aerosol spray containing a mixture of potassium naphthenate (KNAP) and potassium 2,4-dichlorophenoxyacetate (2,4-D), were partially protected from the effects of the herbicide. Protection was obtained against leaf curl, petiole and stem deformation, chlorosis, and mortality. Best protection occurred with 5,000 ppm KNAP and with a 10−1M solution of potassium cyclohexanecarboxylate (KCHC) when mixed with a 40 or 400 ppm 2,4-D solution. No protection was obtained against 4,000 ppm 2,4-D or when the 2,4-D application was delayed for 3 or 6 days after KNAP application. After treatment with 40 ppm, 2,4-D, only KNAP- and KCHC-treated plants showed significant development of trifoliate leaves and flowers.