Antifungal activities and underlying mechanisms of carvacrol against Neopestalotiopsis saprophytica causing leaf brown spot in Rosa roxburghii.

Background: Rosa roxburghii produces a distinctive edible fruit renowned for its high vitamin C content and medicinal properties. Leaf brown spot is a newly identified fungal disease in R. roxburghii, causing considerable production losses in southwest China.

The Dissipation Kinetics, Residue Level and Dietary Risk of Kresoxim-Methyl in Rosa roxburghii and Soil Based on the QuEChERS Method Coupled with LC-MS/MS.

This study aimed to investigate the dissipation, residues and dietary assessment of kresoxim-methyl in the application of Rosa Roxburghii and soil field using liquid chromatography-tandem mass spectrometry (LC-MS/MS). The results show that kresoxim-methyl in R. roxburghii samples was extracted by acetonitrile and purified by ethyl enediamine-N-propylsilane (PSA), while kresoxim-methyl in soil samples was extracted by acetonitrile and purified by octadecylsilyl solid phase dispersant (C).