Scales are often mistaken for part of the plant since they look like natural bumps and do not move when mature. They are also sometimes mistaken for fungal growth. In large numbers, scale can cause yellowing of leaves, leaf drop and dieback of twigs and limbs, or may kill the plant. Many landscape trees and shrubs. Fruit and nut trees.
Monitor plants regularly for honeydew, yellowing or wilting.
For small infestations, rub off by hand using garden gloves, a toothbrush or cotton swab dipped in alcohol. For severe infestations, sections of plants can be pruned and discarded. Use dormant oil during late winter, or highly refined horticultural oil during spring and summer. Privacy Statement 2001 City of Austin, Texas . All Rights Reserved.