The best way to remove them is by hand, but Bacillus thuringiensis, an organic pesticide can also be applied to the affected plant. Another insect to watch out for is the spittlebug. These insects form small white balls of frothy foam. They especially like woody perennial herbs such as rosemary and sage. The balls are protective hiding places for the nymph form of the spittlebug.
Spittlebugs are relatively harmless.
The best way to get rid of the foam balls is to wash them off with water. Each newsletter includes one month's tips on what to do and plant in your southwest garden. One newsletter mailed per month. Our weekly newsletter includes monthly information. To learn more, subscribe above or click here .