| Abstract: | The compound p-chlorophenyl methylcarbamate (PCMC) was shown to inhibit the breakdown of the herbicide isopropyl 3-chlorophenylcarbamate (chlorpropham) in soil, increasing its half-life from 7.5 to 20 days. The inhibitory effect of PCMC on the breakdown of chlorpropham persisted for 40 days, with a half-life of 20 days. The conversion in soil, of PCMC to p-chlorophenol, a compound which did not affect the persistence of chlorpropham, was demonstrated, and it is suggested that spontaneous chemical hydrolysis may account for this conversion. PCMC and p-chlorophenol were shown to be of low toxicity to buckwheat (Fagopyrum esculentum Moensch.). |
