Influence of soil pH and contents of organic carbon and clay on the volatilization of [ 14 C]fenpropimorph after application to bare soil
✍ Scribed by Müller, Thomas; Staimer, Norbert; Kubiak, Roland
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 421 KB
- Volume
- 53
- Category
- Article
- ISSN
- 1526-498X
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✦ Synopsis
The behaviour of the morpholine fungicide fenpropimorph applied to soil was investigated in a laboratory chamber. The volatility and metabolism of a 14C-labelled fenpropimorph formulation was studied after application (Corbel}) to three soils (sandy loam, loamy clay and loamy sand), simulating a four-day weather scenario in the volatilization chamber. Additional experiments were conducted under standard climatic conditions over a period of 24 h using sandy soils with di †erent pH values. The results of the Ðrst experiments showed that most of the radioactivity applied remained in the soils as unchanged fenpropimorph four days after application. In the experiments with the sandy loam and loamy clay, less than 5% of the applied radioactivity was removed by volatilization whereas 11É4% volatilized from the surface of the loamy sand. The comparatively higher volatilization of the fungicide from the loamy sand was conÐrmed by the later experiments indicating that higher soil pH favoured volatilization of [14C]fenpropimorph from sandy soils. Thus 5É6% (pH 5É0), 18É9% (pH 5É8) and 28É3% (pH 6É6) of the radioactivity applied volatilized within one day after application. The overall recoveries were between 93É8% and 111É3% in these experiments.
1998 SCI (