NY Times - Five Easy Ways to Go Organic
1. Milk: One recent United States Department of Agriculture survey found certain pesticides in about 30 percent of conventional milk samples and low levels in only one organic sample.
2. Potatoes: A 2006 U.S.D.A. test found 81 percent of potatoes tested still contained pesticides after being washed and peeled, and the potato has one of the the highest pesticide contents of 43 fruits and vegetables tested...
3. Ketchup: About 75 percent of tomato consumption is in the form of processed tomatoes, including juice, tomato paste and ketchup.
4. Peanut Butter: More than 99 percent of peanut farms use conventional farming practices, including the use of fungicide to treat mold...
5. Apples: ...apples are also one of the most pesticide-contaminated fruits and vegetables.