I don't think I have time to wait. What's the best mode of attack with sprays? Are permethrin, and pyrethrin effective? Should I avoid oil based sprays considering the summer heat? I would be spraying at night, though.geeme said:If you haven't sprayed the plants with anything yet, you might consider a biological solution instead. Green lacewing larvae eat both mites and aphids, as well as a variety of other insects and their eggs. However, if you've already sprayed, the spray would kill them, too. I get beneficial insects from buglogical.com, but there are other providers out there, too. I found my first hatched green lacewing larvae yesterday - the whiteflies will rue the day they went after my plants!