Signe from Hawaii writes
If so how much per gallon and how often?
No, Sevin Concentrate is not labeled to control any type of root aphid. Unfortunately, there are no insecticides listed for this pest specifcally. We suggest contacting your local Cooperative Extension for assistance treating this pest that is specific to your area. This article from the UH Extension gives additional information about this pest.
Answer last updated on: 05/05/2017