Published online by Cambridge University Press: 12 June 2017
Polychlorobenzoic acids (PBA), 2,3,6-trichlorobenzoic acid (2,3,6-TBA), and 2,3,6-trichlorophenylacetic acid (fenac) sprays were applied safely for the eradication of perennial weeds at not over 20 pounds per square inch in winds less than 11 miles per hour in and near cotton. Use of these herbicides near soybeans was hazardous because very small quantities of them caused leaf deformities and some loss in seed yield.