Metabolic fate of dichloromethyl‐0,0‐diphenyl phosphonate (I) and dichloromethyl‐0,0‐di‐(p‐nitrophenyl) phosphonate (II) in/on rice plants∗

Contribution No. 147 from the Division of Agricultural Chemicals, I.A.R.I., New Delhi‐110012. INDIA

Abstract

Metabolic fate of two dichloromethyl diaryl phosphonates (³²P labelled) in/on rice plants was investigated. The test compounds were found to be less persistent on the surface of rice leaves with half lives 7.4 and 6.7 days respectively. Main degradation product from both the phosphonates were dichloromethyl phosphonic acid with trace of dichloromethyl‐O‐aryl phosphonate as a transitory intermediate product.

Key words:

• ³²p labelled diaryl dichloromethyl phosphonates
• persistence
• metabolism and rice

Notes

Contribution No. 147 from the Division of Agricultural Chemicals, I.A.R.I., New Delhi‐110012. INDIA