Behavior of Thiophanate Methyl and Propiconazole in Grape and Mango Fruits Under the Egyptian Field Conditions.
This research aims at determining residues of thiophanate methyl and propiconazole in grape and mango fruits as an indication for their persistence in this environmental compartment. Fruit extracts were analyzed for thiophanate methyl using High Performance Liquid Chromatography and using Gas Chromatography Electron Capture Detector (GC/ECD), respectively. The results indicated that propiconazole had a less environmental impact since propiconazole had shorter residue half-lives which were 1.24 and 1.19 days in grape and mango fruits, respectively, while thiophanate methyl had half-lives of 2.49 and 2.64 days in mango and grape, respectively. The degradation rates of propiconazole in grape and mango fruits did not change significantly and neither did those of thiophanate methyl. According to the maximum residue level, the pre-harvest intervals of propiconazole were set to be 3 and 7 days for grape and mango fruits, respectively, and the pre-harvest intervals for thiophanate methyl were 15 days for both grape and mango fruits. Propiconazole was generally considered to be less hazardous to humans and will leave the environment less altered because of its faster degradation than that of thiophanate methyl.
Natural Resources Department, Institute of African Research and Studies, Cairo University, Giza, 12613, Egypt.
Amira Sh
AS
Soliman
Central Agricultural Pesticides Laboratory, Agricultural Research Center, Giza, Egypt. raniahelmy2003@gmail.com.
Rania M A
RM
Helmy
Central Agricultural Pesticides Laboratory, Agricultural Research Center, Giza, Egypt.
Islam N
IN
Nasr
Natural Resources Department, Institute of African Research and Studies, Cairo University, Giza, 12613, Egypt.
Mohamed S
MS
Abbas
Central Agricultural Pesticides Laboratory, Agricultural Research Center, Giza, Egypt.
Hend A
HA
Mahmoud
IR-4 North Central Region Center, Michigan State University, East Lansing, MI, 48824, USA.
Wayne
W
Jiang
D002851:Chromatography, High Pressure Liquid; D004534:Egypt; D005506:Food Contamination / Q000032:analysis; D005638:Fruit / Q000737:chemistry*; D031022:Mangifera / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D013875:Thiophanate / Q000032:analysis*; D014230:Triazoles / Q000032:analysis*; D027843:Vitis / Q000737:chemistry*
D010573:Pesticide Residues; D014230:Triazoles; C045950:propiconazole; D013875:Thiophanate
Behavior; Grape; Mango; Pesticide persistence; Propiconazole; Thiophanate methyl