I have bagworms on shrubs, so can I pick them off? Then what should I do to prevent further infestation? It is September, not May. Will these spread to other plants like viburnum, wisteria, etc?
Certified GKH Gardening Expert
Here is an article that you may find helpful: https://www.gardeningknowhow.com/plant-problems/pests/insects/treatment-bagworms.htm