| Abstract: | In a 2-year investigation, the dissipation of residues of the fungicide propiconazole from winter wheat straw and leaves was measured by periodic sampling of the green plant material from several plots that had been sprayed with ‘Tilt 2.50EC’ at three different rates. The fungicide deposits on straw and leaves at day 0 were approximately one-quarter of the dose applied on all treatment plots, and this fraction did not differ significantly between three dosage rates. The fungicide residues disappeared rapidly, and the half-life of the fungicide on straw and leaves was approximately 5 days. At harvest time, the fungicide residues in grain and soil were negligible, but the residues remaining on straw and leaves were considerable, especially at higher spraying rates than the recommended dosage. |
