Insects are "accidently" left in as part of the "natural" processing ...well...process.
Let me try to find the link, but I know that there are natural bug parts in peanut butter, cinnamon, jelly, and oatmeal.
(found it)
Determine FDAL's for a few common foods (such as hot dogs, flour, noodles, etc., some examples are listed below). Convert these values into pounds
per package bought in a grocery store, e. g. per 5 pound bag of flour, 12-ounce can, etc.
Are Bugs A Part of Your Diet?
Apple butter 5 insects per 100g
Berries 4 larvae per 500g OR 10 whole insects per 500g
Ground paprika 75 insect fragments per 25g
Chocolate 80 microscopic insect fragments per 100g
Canned sweet corn 2 3mm-length larvae, cast skins or fragments
Cornmeal 1 insect per 50g
Canned mushrooms 20 maggots per 100g
Peanut butter 60 fragments per 100g (136 per lb)
Tomato paste, pizza, and other sauces 30 eggs per 100g OR 2 maggots per 100g
Wheat flour 75 insect fragmnets per 50g
Source: The Food Defect Action Levels: Current Levels for Natural or Unavoidable Defects for Human Use that Present No Health Hazard. Department of
Health & Human Services 1989.
I used this
site as an example.
EWW!
) - just
a consequence of the way the fruit was washed and cooked. 
