For the past few years, I have been plagued with a borer, that seems to attack about the time my tomatoes are getting ripe, sometimes just before and sometimes after harvesting the first batch. I've tried Neem oil, Volck oil, and low toxicity insecticides to no avail. The make a small hole usually near a crotch in the plant, and lay an egg, which hatches into a maggot, which morphs into a very small black borer looking insect. The plant starts wilting shortly after they start their dirty work of eating inside the stems, usually working towards the base of the stem.
Does anyone have any suggestions, or has anyone come up with an effective countermeasure? I'm at wits end, as they are winning.