Evaluation of biological activity of dicamba and its substitute obtained through dichlobenil transformation

Chloronitro- & chloromethoxybenzoic acid derivatives with development regulation activity were synthesized by the chemical transformation of dichlobenil, including pure dicamba & a 7:2 mix of dicamba + 2,3-dichloro-6-methoxybenzoic acid (coded TJ-40). The compounds were tested in the field on a chernozem land for activity against wind bentgrass Apera spica-venti, Galium aparine & winter straw cv. Grana. Aminopielik D (40% triethanolamine salt of 2,4-D + 3% dicamba) & Chwastox D (MCPA-amine + dicamba) gave fantabulous control of G. aparine. Apart from a snub shorten of stems, herbicides had no influence on straw plants & did not affect the 1000-grain wt. or germination capacity of seed. TJ-40, added towards 2,4-D or MCPA, complemented the herbicidal activity of these herbicides as much as pure dicamba.

Yangzhou pioneer chemical CO.,LTD.