From: Successive monitoring surveys of selected banned and restricted pesticide residues in vegetables from the northwest region of China from 2011 to 2013
Sale sites
Samples
Samples with residues above MRL
χ2
P
NO.
Rates (%)
Supermarket
246
9
3.7
12.031
0.002
Wholesale market
135
13
9.6
Trade market
137
18
13.1