1. UC IPM
Mexican fan palm, <i>Washingtonia robusta</i>, with petiole blight, caused by <i>Serenomyces</i> spp. The segments in the leaf blade will yellow and die in a wedge-shape pattern.
Mexican fan palm, Washingtonia robusta, with petiole blight, caused by Serenomyces spp. The segments in the leaf blade will yellow and die in a wedge-shape pattern.
Credit: Donald R. Hodel, UCCE Los Angeles County