I'm having wicked bad aphids. First year ever. THOUSANDS of them. I used Sevin, 2 days later all were back. I used Eight, back again. I sprayed them off daily, each f'n leaf. Within hours they were back. I just unleashed 2000 ladybugs. They eat a lot but I still have hundreds on each plant. I've never had them at all, and now I'm knee deep in those little green bastards.