Comparison of residue patterns between foliar application and drenching in export strawberry
2017
Lee, H.S., Agro-Food Safety and Crop Protection Department, NAS, RDA, Wanju, Republic of Korea | Hong, S.M., Agro-Food Safety and Crop Protection Department, NAS, RDA, Wanju, Republic of Korea | Kwon, H.Y., Agro-Food Safety and Crop Protection Department, NAS, RDA, Wanju, Republic of Korea | Kim, D.B., Agro-Food Safety and Crop Protection Department, NAS, RDA, Wanju, Republic of Korea | Moon, B.C., Agro-Food Safety and Crop Protection Department, NAS, RDA, Wanju, Republic of Korea
Strawberries are one of the main commodities in Korea and have been exported over 30 million dollar. And the safety has recently become an important issue in the agro-trade, pesticide residue is most important matter of safe agricultural products. As strawberries can be cultivated using elevated production system, so it is possible to use the drenching. When spraying the pesticides, the use of drenching can be lower amount of residual than using foliar treatment. In this study, time sequential residual amount of pesticides were compared between drenching and foliar application in strawberries. Pesticides were treated with the standard and double dosage and samples were collected at 0, 3, 6, 9, 13, 16 and 21 day and analyzed by LC and LC-MS/MS after liquid-liquid extraction and QuEChERS. Two pesticides were detected less than 1 mg/kg in all samples for drenching treatment. Carbendazim residues in drenching treatment were 5 to 25 times lower than foliar application. And azoxystrobin was not detected in strawberries of drenching treatment.
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