Thermal Storage Effect on Metalaxyl and Detection of Its Residues on Tomato and Their Relevant Impurities | ||
| Journal of Applied Plant Protection | ||
| Article 4, Volume 7, Issue 1, 2018, Pages 27-32 PDF (210.64 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/japp.2018.57960 | ||
| Author | ||
| Alaa M. Khozimy Mohamed F. A. Ramadan | ||
| Abstract | ||
| Metalaxyl fungicide under trade name vacomil 35% wettable powder (WP) was applied on tomato at the recommended dosage 262.5 g a.i./ ha to study the residues and dissipation rate of tested fungicide under field condition by LCMS/MS. Also, the tested fungicide was stored according to Food and Agriculture Organization (FAO) for 14 days at 54 ± 2ºC to study the effect of thermal storage on degradation of metalaxyl active ingredient and stability of their relevant impurities (2,6-dimethylaniline) beside its physical properties. Data illustrated that residues of metalaxyl reached below the maximum residue limit (MRL) of metalaxyl after 7 days from application at the recommended dosage. The half-life (t1/2) for metalaxyl degradation was 1.84 days. Metalaxyl active ingredient was slightly affected with thermal storage and become conformity with FAO specifications and half-life (t1/2) for metalaxyl active ingredient was 8.99 days. 2,6-dimethylaniline as relevant impurities of metalaxyl was increased by extending storage time. It became non conformity with FAO specification under thermal storage where, it was 0.024% before one day of storage and after 14 days of storage reached 0.042% recording increasing rate 75%. All physical properties tests passed successfully and became conformity with FAO specifications. | ||
| Keywords | ||
| Metalaxyl; fungicide; degradation and storage | ||
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