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Original Articles

Herbicidal activity and application cyclic of phosphonates

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Pages 510-512 | Received 29 Sep 2018, Accepted 12 Oct 2018, Published online: 17 Nov 2018
 

Abstract

Among alkylphosphonates Io, O,O-dimethyl 1-(2,4-dichlorophenoxyacetoxy) ethylphosphonate (clacyfos) was found to be an effective inhibitor against dicotyledons PHDc and exhibited excellent herbicidal activity in our previous work. According to our study on the alkylphosphonates Io, both R1 and R2 groups in the structural unit of phosphorus-containing played a very important role in herbicidal activity. Therefore, a series of 2-[1-(substituted phenoxycarboxy)alkyl]-5,5-dimethyl-1,3,2-dioxaphosphinane-2-one containing fluorine II was obtained by the modification of alkylphosphonates Io. The bioassay results showed that cyclic phosphonate II-6 with CH3 as R, 2-Cl,4-F as Yn exhibited promising herbicidal activity. Its herbicidal activity, weed-controlling spectrum, selectivity between crops and weeds were further evaluated in greenhouse and field.

Graphical Abstract

Additional information

Funding

The work was supported in part by the National Research and Development Plan (2017YFD0200506), the National Natural Science Foundation of China (21877047), 111 Project B17019.

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