Food can include all kind of things like excrements, fur, molds or insect infestation... FDA regulates those kind of FOOD DEFECTS.
I think the information on this poster is totally misleading and false. It is sure that they are food defects but insects are a small part of the whole. THE FDA controls the maximum level of defects and doesn't ensure that 5% of the food has insects. The second thing is that I wash my food so I should at least remove most defects unless it is canned food. The third thing is that I never saw any insect part in my food. I think it will be rare to find full insects if the food has a defect... Or else, you return the product...
Some sources say it is presently difficult to kill all insects. So some may still be in food.
http://www.thecropsite.com/articles/1242/ozone-kills-insects-in-grain/Quote :
Title 21, Code of Federal Regulations, Part 110.110 allows the Food and Drug Administration (FDA) to establish maximum levels of natural or unavoidable defects in foods for human use that present no health hazard. These "Food Defect Action Levels" listed in this booklet are set on this premise--that they pose no inherent hazard to health.
Poor manufacturing practices may result in enforcement action without regard to the action level. Likewise, the mixing of blending of food with a defect at or above the current defect action level with another lot of the same or another food is not permitted. That practice renders the final food unlawful regardless of the defect level of the finished food.
The FDA set these action levels because it is economically impractical to grow, harvest, or process raw products that are totally free of non-hazardous, naturally occurring, unavoidable defects. Products harmful to consumers are subject to regulatory action whether or not they exceed the action levels.
It is incorrect to assume that because the FDA has an established defect action level for a food commodity, the food manufacturer need only stay just below that level. The defect levels do not represent an average of the defects that occur in any of the products--the averages are actually much lower. The levels represent limits at which FDA will regard the food product "adulterated"; and subject to enforcement action under Section 402(a)(3) of the Food, Drug, and Cosmetics Act.
As technology improves, the FDA may review and change defect action levels on this list. Also, products may be added to the list. The FDA publishes these revisions as Notices in the Federal Register. It is the responsibility of the user of this booklet to stay current with any changes to this list.