I just read an article on Real Simple that listed the top 10 organic foods that are worth the money and their reasoning. Here is a summary or you can read the entire article here as well.
Baby Food – “An infant’s immune, nervous, and detoxification system is less developed than an adult’s and more vulnerable to the effects of pesticides,” says Elson M. Haas, M.D., author of The Staying Healthy Shopper’s Guide. The green beans, peaches, and apples that go into baby food (and all over your kitchen floor) tend to be treated with chemicals. Organic brands like Earth’s Best are available.
Apples – A is for apple―and a lot of pesticides. According to the Food and Drug Administration, more pesticides (a whopping 36) are found on apples than on any other fruit or vegetable. In one test, as many as seven chemicals were detected on a single apple.
Strawberries – Strawberries are one of the most contaminated of all produce items in the United States.
Grapes – Because grapes ripen quickly, tend to mold, and attract insects, growers hit them with multiple applications of various chemicals. The worst are Chilean grapes, which are treated with as many as 17 of them.
Butter & Milk – The grains that dairy cows eat are heavily treated with chemicals, which have a residual, though still notable, presence in milk and dairy products. (Milk may also contain bovine growth hormone and antibiotics.)
Winter Squash – Like cantaloupes and cucumbers, winter squash has a propensity to absorb dieldrin from the soil into its edible parts.
Cucumbers – In a survey of 42 common vegetables, cucumbers were ranked second in cancer risk and 12th in “most contaminated food” by the Environmental Working Group, a respected public-interest group.
Green Beans – The Environmental Protection Agency has more than 60 pesticides registered for use on green beans.
Spinach – In a certain cartoon, spinach makes muscles. In real life, the chemicals used to treat it may cause cancer or interfere with hormone production.
Cantaloupe – Cantaloupes often contain five of the longest-lasting chemicals, one of which is dieldrin, an exceedingly toxic and carcinogenic insecticide.