Thanks for the help Bob. Much appreciated. I'm down in Phoenix, AZ and have never seen a sawfly before. These seem to be much smaller than the sawfly larvae as well. I have a TON of moths where I'm growing my tobacco which I worry is wreaking havoc with all my plants. My lettuce has been devoured and my broccoli is getting there as well. Neem oil isn't helping at all.Welcome to the forum. Feel free to introduce yourself in the Introduce Yourself forum.
My guess is that it is a clump of sawfly larvae that have just emerged from that messy cocoon. Similar to cabbage caterpillars. I'm not aware that they are an intentional pest of tobacco.
EDIT: Here is something quite similar, but feeds on pine.
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