A new survey by environmental pressure group Friends of the Earth (FoE) shows that 60% of fruit and vegetables sold in Somerfield over the past four years contain pesticide residues. The results make the retail chain the worst performer out of the nine supermarkets surveyed. The FoE survey is based on data published by the government's Pesticides Safety Directorate between 1998 and 2001. The latest pesticide residue results (for the Q1 2002) are due to be published later today (Wednesday).