Effects of 3-nitrocinnamic acid and 3,4-(methylenedioxy) cinnamic acid on the growth of weeds and crops

Abstract

3-Nitrocinnamic acid, 3,4-(methylenedioxy)cinnamic acid, sodium 3-nitrocinnamate and 3,4-(methylenedioxy)cinnamate were synthesized and tested on important economic crops and noxious weeds. All of tested chemicals synthesized from the condensation reaction between malonic acid and selected aromatic aldehyde. At 100 ppm all substances had more than 60% in germination inhibition and growth inhibition on tested weed species and crops, also. To find out the effective concentration of sodium 3-nitrocinnamate and sodium 3,4-(methylenedioxy) cinnamate, Chloris barbata Sw. and Macroptilium lathyroides (L.) Urb. Were selected as target plant species in pot test. The result indicated that these chemicals have 44% inhibition on tested plants at 30000 ppm. According to pot test chemicals can merely inhibit all test plants growth. Their leaves were burn and curly but can recover themselves within 12 days. For toxicity study on Pomacea canaliculata Lamarck., all tested chemicals have less than 7% toxicity