1. UC IPM
Newly emerged leaves of a California fan palm, <i>Washingtonia filifera</i>, killed by pink rot, caused by <i>Nalanthamala vermoeseni</i>. Note the diamond scale, a fungal disease caused by <i>Phaeochoropsis neowashingtoniae</i>, which likely stressed this palm, making it susceptible to pink rot.
Newly emerged leaves of a California fan palm, Washingtonia filifera, killed by pink rot, caused by Nalanthamala vermoeseni. Note the diamond scale, a fungal disease caused by Phaeochoropsis neowashingtoniae, which likely stressed this palm, making it susceptible to pink rot.
Credit: Donald R. Hodel, UCCE Los Angeles County