UW-Extension/Madison Plant Disease Diagnostic Clinic (PDDC) Update

Brian Hudelson, Ann Joy, Erin DeWinter and Joyce Wu, Plant Disease Diagnostics Clinic

The PDDC receives samples of many plant and soil samples from around the state.  The following diseases/disorders have been identified at the PDDC from June 8, 2013 through June 14, 2013.

Plant/Sample Type,  County,  Disease/Disorder,  Pathogen                                 

FRUIT CROPS                                                                                                      

Apple, Cedar-Apple Rust , Gymnosporangium juniper-virginianae, Lafayette

Pear, Pear Scab, Venturia pirina, Dane

Plum, Plum Pockets, Taphrina communis, Dane


Onion, Root Lesion, Pratylenchus sp., Columbia, Green Lake, Marquette

Tomato, Unidentified Viral Disease, Unknown, Dane


Hops, Fusarium Stem Canker, Fusarium sp., Dodge


Soil, Soybean Cyst, Heterodera glycines, Sauk

For additional information on plant diseases and their control, visit the PDDC website at pddc.wisc.edu.