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 July 6, 2013 through July 12, 2013.

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

FIELD CROPS,

Corn, Seedling Blight, Fusarium spp, Marinette

FORAGE CROPS,

Alfalfa, Aphanomyces Seedling Blight, Aphanomyces euteiches, Kewaunee

Alfalfa, Charcoal Rot, Macrophomina phaseolina, Jefferson

Alfalfa, Fusarium Wilt, Fusarium oxysporum, Jefferson

FRUIT CROPS,

Apple, Apple Scab, Venturia inaequalis, Monroe

Grape, Anthracnose, Sphaceloma ampelinum, Columbia

Grape, Herbicide Damage, None, Richland

Peach, Peach Leaf Curl, Taphrina deformans, Dane

VEGETABLES,

Cabbage, Black Rot, Xanthomonas campestris pv. campestris, Outagamie, Walworth

Potato, Black Leg, Pectobacterium carotovorum, Sauk, Sherburne (MN)

Potato, Early Blight, Alternaria solani, Dane

SOIL,

Field Soil, Soybean Cyst Nematode, Heterodera glycines, Dunn, Rock

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