Diseases are often spread by insects. Between the fungicides and insecticides that are keeping those supermarket offerings picture perfect, you gotta wonder if we should really tolerate a certain amount of damage.
It is difficult to know when to pick up the sprayer but I'm not going to follow the food industry's model anyway.
Getting down to look as closely as you can and doing it often are real good ideas. Harvest on time, however!! Age results in "insults" whether we are plant or animal. And we must decide, whether 'tis nobler in the mind to suffer the slings and arrows of outrageous fortune, or to take arms against them.
Steve