Pesticides are mixture of worlds most chemicals used on farms to prevent or destroy weeds, insects and pests affecting crops. It clearly says eating non organic food is equal to eating worst chemicals in the world.
Below listed fruits and vegetables are concentrated highly with Pesticides, hence its advisable to go by Organic produce( free from any pesticides). By picking organic vegetables and fruits we are gained by with more nutritions.

Fruits and Vegetables have nutrients and health benefits everyone deserves, Environmental Working Group says we can reduce 80% of pesticide consumption by picking Organic fruits and vegetables.
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Potatoes
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Peaches
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Spinach
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Tomatoes
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Apples
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Cucumbers
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Strawberries
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Nectarines
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Grapes
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Celery
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Sweet Bell Peppers
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Peas
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Hot Peppers/Chillies
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Cabbages
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Brinjal
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Bendi
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Banana
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Cauliflower
Tips: Soak and wash vegetables and fruits before use, peel the skin to avoid consuming maximum pesticide. It is always advisable and better to choose Organic Vegetables and Fruits.
If you are looking to Buy Organic Vegetables Online, then Myrightbuy is the right place to buy Groceries Online Chennai.