California fan palms, Washingtonia filiera, with diamond scale caused by Phaeochoropsis (=Sphaerodothis) neowashingtoniae typically have a reduced canopy of leaves.
California fan palms, Washingtonia filiera, with diamond scale caused by Phaeochoropsis (=Sphaerodothis) neowashingtoniae typically have a reduced canopy of leaves. Credit: Donald R. Hodel, UCCE Los Angeles County