Good morning, friends, My zonal and regal geraniums are being devastated after a wonderfully robust start. I have sprayed them with Pyrethrin (sp?), and have not seen much reduction in bud destruction. I have just purchased some BT which I hope will help me out. How often should I apply it to keep the nasties down? Or should I stick with Pyrethrin and more frequent sprayings.? Both those in pots and those in the ground are having their lovely blooms chewed to ribbons. Ron Van Nuys, CA Ron