Degradation of three fungicides following application on strawberry and a risk assessment of their toxicity under greenhouse conditions.
The health risk to humans of pesticide application on minor crops, such as strawberry, requires quantification. Here, the dissipation and residual levels of three fungicides (pyraclostrobin, myclobutanil, and difenoconazole) were studied for strawberry under greenhouse conditions using high-performance liquid chromatography (HPLC)-tandem mass spectrometry after Quick, Easy, Cheap, Effective, Rugged, and Safe extraction. This method was validated using blank samples, with all mean recoveries of these three fungicides exceeding 80%. The residues of all three fungicides dissipated following first-order kinetics. The half-lives of pyraclostrobin, myclobutanil, and difenoconazole were 1.69, 3.30, and 3.65 days following one time application and 1.73, 5.78, and 6.30 days following two times applications, respectively. Fungicide residue was determined by comparing the estimated daily intake of the three fungicides against the acceptable daily intake. The results indicate that the potential health risk of the three fungicides was not significant in strawberry when following good agricultural practices (GAP) under greenhouse conditions.
State Key Laboratory Breeding Base for Zhejiang Sustainable Plant Pest Control, MOA Key Lab for Pesticide Residue Detection, Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, 198# Shiqiao Road, Hangzhou, Zhejiang, People's Republic of China.
Caixia
C
Sun
Tao
T
Cang
Zhiwei
Z
Wang
Xinquan
X
Wang
Ruixian
R
Yu
Qiang
Q
Wang
Xueping
X
Zhao
D000383:Agriculture / Q000379:methods; D002219:Carbamates; D002853:Chromatography, Liquid; D004148:Dioxolanes; D004784:Environmental Monitoring; D031985:Fragaria / Q000737:chemistry*; D005659:Fungicides, Industrial / Q000032:analysis* / Q000633:toxicity; D006207:Half-Life; D013058:Mass Spectrometry; D009570:Nitriles; D010573:Pesticide Residues / Q000032:analysis* / Q000633:toxicity; D011720:Pyrazoles; D018570:Risk Assessment; D000073739:Strobilurins; D014230:Triazoles
D002219:Carbamates; D004148:Dioxolanes; D005659:Fungicides, Industrial; D009570:Nitriles; D010573:Pesticide Residues; D011720:Pyrazoles; D000073739:Strobilurins; D014230:Triazoles; C446685:systhane; C115058:difenoconazole; C513428:pyrachlostrobin