Pest identification
and confirmation—Phytophthora crown rot
Phytophthora crown rot can be distinguished from other diseases by the appearance of crown tissue discoloration
and decay. The decay usually starts at one point on the crown and spreads around the crown until the entire
plant is girdled. The roots may remain healthy. If the diseased crown is sliced open, the affected area
appears water soaked and uniformly brown; the discoloration is not confined to the vascular tissue. | 
Brown
discoloration of crown tissue |
