Garden Pests and Diseases: Caterpillar on Lupine, 0 by 1alh1

1alh1 wrote:
It's been very hot and dry, and a few days ago I noticed some of my otherwise healthy lupines going limp. When I took a closer look, I found that the plants were being attacked by lots of these caterpillars. Small, black dots (eggs) were laying on leaves, and a webbing enclosed many of the larger groups of caterpillars. I've sprayed with Bt and cut out portions of the lupines that were beyond saving since they were thick with eggs and caterpillars. I've been growing lupines for many years and have never seen these destructive things. Can anyone identify them? What else should I be doing to save my lupines from this infestation?