Posted this on DG too...
Apply an insecticide to kill any remaining blister beetles. Avoid the temptation to wait before using an insecticide. These insects act so quickly when consuming your plants that the sooner you use an insecticide, the quicker you can save your plants. According to Oklahoma State University Cooperative Extension, approved insecticides you can use to kill blister beetles include Sevin and Thiodin. Organic options include natural chemicals such as pyrethrum and rotenone, according to the National Sustainable Agriculture Information Center. Follow the product directions carefully to ensure that you kill all remaining blister beetles.
Those insecticides will kill good bugs too so use with caution...
