|Click on the pic to enlarge. Critters are on the middle stalk.
I can't make much of it but maybe you can. A friend of Wifey's (hi Emilie!) sent these pictures to her a few weeks ago asking if we knew what was invading her Tomato plants. The top picture shows the critters (you have to click on the picture to see the magnified version). They are on the middle stem and look like little aphids or something.
The bottom picture is showing how her plant was dying and she wondered why?
Do any of you Master Gardeners have any input on these pics?