'Tis the Season- California celery have leaf miners. Out of 2 cases of celery there were 85 stalks with leaf miners. The Leaf miners are found in the outer darker green stalks. Their tell tale trails is a somewhat wavy translucent trail.
Update: Blueberries were found to be infested regardless from what part of the USA or Canada they originate from. We recently checked with a company that produces Blueberry filling with a hashgocha their process. They use "wild blueberries" ( Cultivated blueberries have somewhat less infestation). They have the Mashgiach check them for infestation (and never found any blueberries that are infested). They cook it with water for a while then add the thickening agent. We were not able to justify using the Blueberry filling.
There was a large fish monger operation in the Boston area under a Hashgocha, but did not have a mashgiach on premises. The Certifier was questioned "how do certify a skinless fish operation without a mashgiach on premises"? He responded that he visits a few times a year and he has a special battery operated WAND that he passes over the tanks of fish, if there are any non kosher fish IT BEEPS!
He was asked how do you know it works? He responded "it never beeped"!!!