Hello and thanks for any help!

#1: I had(already removed all I found) greenish/yellowish egg shaped things embedded within several shoots of my red onions in their planter box. I have been finding a ton of black caterpillars, so I assume they are caterpillar eggs. But I also noticed a wasp camped out there yesterday. So, who's eggs are they? Could they be the wasp's? Or was the wasp feasting on or parasitizing the caterpillars? I sure don't want baby wasps popping out. If they are eating the caterpillars, who knew, they actually serve a positive purpose.

#2: My large green tomatoes are all getting a brown, rusty color to their "belly button", where the stem connects to the top of the plant. The tomatoes, stems and leaves are still green, but I can see the brown edges under the connecting leaves, is that a thing? Also on tomatoes, two are getting concentric small cracks. Does that just mean the belly button part is cracking too?

Thanks so much, gardening is so mysterious and it's hard to find the exact answers on the internet, I've been looking.

This post was edited by silvali on Tue, Jun 24, 14 at 11:10