Citrus Extension
Phytophthora
Florida Citrus Pest Management Guide: Phytophthora Foot Rot and Root Rot
http://edis.ifas.ufl.edu/cg009
Field Diagnosis and Management of Phytiohthora Diseases
http://edis.ifas.ufl.edu/hs261
Phytophthora Management Identification Sheet for Commercial Citrus Groves
http://edis.ifas.ufl.edu/pp269
A Guide to Citrus Disease Identification
http://edis.ifas.ufl.edu/ch159
