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An evaluation of the persistence in soil of two non-chlorinated insecticides analogous to DDT by Ronald W. L. Kimber is a Agricultural and Biological Sciences article available to read on EtoBox.

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## Abstract Two insecticides 1,1‐bis(4‐ethoxyphenyl)‐2‐nitrobutane (ENB) and 1,1‐bis(4‐ethoxyphenyl)‐2‐nitropropane (ENP), at concentrations varying from 0.4‐40 mg kg^−1^ have been examined for persistence in three soils. The proportions of the original compounds recovered decreased rapidly in a clay loam (falling to 50% in 2‐6 weeks), decreased slowly in a sand (falling to 50% in 16‐64 weeks) and decreased variably in a heavy clay (falling to 50% in 2‐10 weeks). After the initial phase, the proportion recovered generally decreased at a slower rate. Breakdown of ENP appeared to proceed via a stepwise oxidation to give 1,1‐bis(4‐ethoxyphenyl)propan‐2‐one and 4,4′‐diethoxybenzophenone. These products were readily broken down under aerobic conditions and were isolated only from waterlogged or sterile soil. Experiments under sterile conditions indicated that biological breakdown was a major factor and that chemical breakdown was specifically surface‐activated.

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Author

Ronald W. L. Kimber

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1526-498X)

Published

1980

Language

EN

ISBN

9782780110513

Field

Agricultural and Biological Sciences (Life Sciences)