ROOT APHIDS

Dan, The Hydro Man (Internet): I have been battling root aphids. I have watered with nematodes twice in two weeks. Now the aphids are walking around on the floor but they are still in the root zone. I set a pyrethrum fogger to take care of the exposed live aphids. I am about to water the soilless planting mix with Botanigard. Then in two days add more nematodes.  Do you have any suggestions?

Ed: Most of your efforts are effective. Beneficial nematodes attack most soil dwelling insects. Use pyrethrum as a drench, rather than as a spray or a bomb. This way it gets directly to the insects. Botanigard contains spores of Beauveria bassiana strain GHA. This fungus attacks soft-bodied insects, causing their deaths. It can also be applied as a drench. All three of these treatments can be used concurrently to attack the pests.