Evaluation on Biological Activity of New Compound HIA-1

In order to demonstrate the development and application value of a novel compound O,O-dimethyl-1-(2,4-dichlorophenoxy-acetyloxy)-methylfuran phosphonate (HIA-1),comprehensive evaluation on the herbicidal activity,spectrum of weed control,safety to crops,application timing and absorption site of HIA-1 were carried out. The result of pot bioassay in greenhouse showed that the efficacy of HIA-1 to most familiar latifoliate weeds such as Abutilon theophrasti,Amaranthus retroflexus and Portulaca oleracea was over 90% at dosage of 600 g (a.i.)/hm2. It was safe to wheat and corn at dosage of 1 600 g (a.i.)/ hm2,the fresh-weight inhibitory rate was 9.06% and 12.04% respectively,however it showed obvious phytotoxicity to cotton,peanut,soybean and cole at the same dosage.The application timing of HIA-1 was from 2 to 3-leaf stage of weeds.By the method of active carbon isolation,spraying leaves and pouring roots,the absorption site of HIA-1 was studied.The result suggested HIA-1 could be absorbed by buds,radicles,leaves,root and stems.In conclusion,HIA-1 showed potentials in controlling latifoliate weeds in wheat and corn fields.