All posts by hudelson

Wisconsin Disease Almanac – April 11, 2025

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from April 5, 2025 through April 11, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Boxwood
Disease/Disorder:  Volutella Canker
Pathogen:  Volutella sp.
County:  Dane

Plant:  Crabapple
Disease/Disorder:  Cedar-Apple Rust
Pathogen:  Gymnosporangium juniperi-virginianae
County:  Washington

Plant:  Oak (Bur)
Disease/Disorder:  Diplodia Canker
Pathogen:  Diplodia sp.
County:  Eau Claire

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Field Crops Icon

Field Crops

No New Diseases

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Forage Crops Icon

Forage Crops

No New Diseases

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Fruit Crops Icon

Fruit Crops

No New Diseases

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Herbaceous Ornamentals Icon

Herbaceous Ornamentals

Plant:  Astilbe
Disease/Disorder:  Tobacco Rattle
Pathogen:  Tobacco rattle virus
County:  Dane

Plant:  Geranium
Disease/Disorder:  Black Leg
Pathogen:  Pythuim sp.
County:  Winnebago

Plant:  Geranium
Disease/Disorder:  Cucumber Mosaic
Pathogen:  Cucumber mosaic virus
County:  Jefferson

Plant:  Geranium
Disease/Disorder:  Root Rot
Pathogen:  Pythuim sp., Rhizoctonia sp.
County:  Winnebago

Plant:  Ranunculus
Disease/Disorder: Tobacco Rattle
Pathogen:  Tobacco rattle virus
County:  Jefferson

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Houseplants Icon

Houseplants

No New Diseases

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

Plant:  Spruce (Unspecified)
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp. 
County:  Winnebago

Plant:  Spruce (Unspecified)
Disease/Disorder:  Rhizosphaera Needle Cast
Pathogen:  Rhizosphaera kalkhoffii
County:  Winnebago

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Vegetable Crops Icon

Vegetable Crops

Plant:  Potato
Disease/Disorder:  Bacterial Soft Rot
Pathogen:  Pectobacterium carotovorum subsp. carotovorum, Pectobacterium parmentieri
County:  Waushara

Plant:  Potato
Disease/Disorder:  Common scab
Pathogen:  Streptomyces scabies
County:  Waushara

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Specialty Crops Icon

Specialty Crops

No New Diseases

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Miscellaneous Icon

Miscellaneous

No New Reports

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Wisconsin Disease Almanac – January 1, 2025 through April 4, 2025

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from January 1, 2025 through April 4, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Beech (European)
Disease/Disorder:  Phytophthora Canker
Pathogen:  Phytophthora cactorum
County:  Milwaukee

Plant:  Hornbeam
Disease/Disorder:  Root/Crown Rot
Pathogens:  Phytophthora sp.
County:  Dane

Plant:  Maple (Norway)
Disease/Disorder:  White Rot (on dead wood)
Pathogen:  Dryad’s saddle (Polymorphus squamosus)
County:  Dane

Plant:  Oak (Bur)
Disease/Disorder:  Coryneum Canker
Pathogens:  Coryneum sp.
County:  Dane

Plant:  Oak (Pin)
Disease/Disorder:  Jelly Fungus (Unidentified)
Pathogens:  None
County:  Dane

Plant:  Oak (Red)
Disease/Disorder:  Brittle Cinder (Suspected)
Pathogen:  Kretzschumaria deusta
County:  Dane

Plant:  Oak (White)
Disease/Disorder:  Brittle Cinder (Suspected)
Pathogen:  Kretzschmaria deusta
County:  Dane

Plant:  Oak (Unspecified)
Disease/Disorder:  Armillaria Root Disease (Suspected)
Pathogen:  Armillaria sp.
County:  None (Republic of Singapore)

Plant:  Serviceberry
Disease/Disorder:  Lichens
Pathogen:  None
County:  Dane

Plant:  Tree (Unspecified)
Disease/Disorder:  Phomopsis Gall
Pathogen:  Phomopsis sp.
County:  Dane

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Field Crops Icon

Field Crops

No New Diseases

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Forage Crops Icon

Forage Crops

No New Diseases

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Fruit Crops Icon

Fruit Crops

Plant:  Grape
Disease/Disorder:  Phomopsis Cane and Shoot Spot
Pathogen:  Phomopsis sp. 
County:  Sauk

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Herbaceous Ornamentals Icon

Herbaceous Ornamentals

Plant:  Begonia
Disease/Disorder:  Impatiens Necrotic Spot
Pathogen:  Impatiens necrotic spot virus
County:  Clark

Plant:  Calibrachoa
Disease/Disorder:  Powdery Mildew (Suspected)
Pathogen:  Oidium sp.
County:  Taylor

Plant:  Coleus
Disease/Disorder:  Aerial Pythium
Pathogen:  Pythium sp.
County:  Waushara

Plant:  Coleus
Disease/Disorder:  Downy Mildew
Pathogens:  Peronospora lamii
Counties:  Columbia, Dane

Plant:  Geranium
Disease/Disorder:  Gray Mold/Botrytis Blight
Pathogen:  Botrytis cinerea
County:  Clark

Plant:  Geranium
Disease/Disorder:  Root Rot
Pathogen:  Pythium sp.
County:  Clark

Plant:  Gladiolus
Disease/Disorder:  Leafy Gall
Pathogen:  Rhodococcus faciens
County:  Clark

Plant:  Hosta
Disease/Disorder:  Physical Abrasion (Suspected)
Pathogen:  None
County:  Jefferson

Plant:  Pachysandra
Disease/Disorder:  Volutella Blight
Pathogen:  Volutella pachysandricola
County:  Waukesha

Plant:  Pachysandra
Disease/Disorder:  Winter Burn
Pathogen:  None
County:  Waukesha

Plant:  Pericallis
Disease/Disorder:  Impatiens Necrotic Spot
Pathogens:  Impatiens necrotic spot virus
County:  Jefferson

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Houseplants Icon

Houseplants

Plant:  Fig (Weeping)
Disease/Disorder:  Crown Gall (Suspected)
Pathogen:  Agrobacterium tumefaciens
County:  Dane

Plant:  Money Tree
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp.
County:  Fond du Lac

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

Plant:  Arborvitae
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp.
County:  Waukesha

Plant:  Arborvitae
Disease/Disorder:  Water Stress (Suspected)
Pathogen:  None
County:  Kenosha

Plant:  Pine (Austrian)
Disease/Disorder:  Diplodia Shoot Blight and Canker (Suspected)
Pathogen:  Diplodia sp.
County:  Racine

Plant:  Pine (Austrian)
Disease/Disorder:  Water Stress (Suspected)
Pathogen:  None
County:  Racine

Plant:  Pine (Japanese Umbrella)
Disease/Disorder:  Needle Spot
Pathogen:  Colletotrichum sp.
County:  Dane

Plant:  Pine (Scots)
Disease/Disorder:  Brown Spot
Pathogens:  Lecanosticta acicola (Mycosphaerella dearnessii)
County:  Clark

Plant:  Spruce (Blue)
Disease/Disorder:  Diplodia Shoot Blight and Canker
Pathogen:  Diplodia sp. 
County:  Dane

Plant:  Spruce (Blue)
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp. 
County:  Dane

Plant:  Spruce (Unspecified)
Disease/Disorder:  Rhizosphaera Needle Cast
Pathogen:  Rhizosphaera kalkhoffii
County:  Dane

Plant:  Spruce (Unspecified)
Disease/Disorder:  Water Stress (Suspected)
Pathogen:  None
Counties:  Dane, Milwaukee

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Vegetable Crops Icon

Vegetable Crops

Plant:  Cabbage
Disease/Disorder:  Black Rot
Pathogen:  Xanthomonas campestris pv. campestris
County:  St. Johns (FL)

Plant:  Cabbage
Disease/Disorder:  Cucumber Mosaic
Pathogen:  Cucumber mosaic virus
County:  Flagler (FL)

Plant:  Cabbage
Disease/Disorder:  Impatiens Necrotic Spot
Pathogen:  Impatiens necrotic spot virus
County:  Flagler (FL)

Plant:  Carrot
Disease/Disorder:  Fusarium Dry Rot
Pathogen:  Fusarium sp.
County:  Dane

Plant:  Collards
Disease/Disorder:  Fertility Issues (suspected)
Pathogen:  None
County:  Dane

Plant:  Kale
Disease/Disorder:  Fertility Issues (suspected)
Pathogen:  None
County:  Dane

Plant:  Potato
Disease/Disorder:  Bacterial Soft Rot
Pathogens:  Pectobacterium atrosepticum, Pectobacterium carotovorum subsp. carotovorum, Pectobacterium parmentieri
Counties:  Portage, Waushara 

Plant:  Potato
Disease/Disorder:  Corky Ringspot
Pathogens:  Tobacco rattle virus
County:  Portage 

Plant:  Potato
Disease/Disorder:  Dry Rot
Pathogens:  Fusarium sp.
Counties:  Portage, Waushara 

Plant:  Potato
Disease/Disorder:  Powdery Scab
Pathogen:  Spongospora subterranea subsp. subterranea
County:  Adams

Plant:  Radish (Watermelon)
Disease/Disorder:  Root Rot
Pathogens:  Fusarium sp., Rhizoctonia sp.
County:  Crawford

Plant:  Radish (Watermelon)
Disease/Disorder:  Root Spot
Pathogen:  Xanthomonas sp.
County:  Crawford

Plant:  Rosemary
Disease/Disorder:  Powdery Mildew (Suspected)
Pathogen:  Oidium sp.
County:  Fond du Lac

Plant:  Tomato
Disease/Disorder:  Edema
Pathogen:  None
County:  Rock

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Specialty Crops Icon

Specialty Crops

No New Diseases

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Miscellaneous Icon

Miscellaneous

No New Reports

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Wisconsin Disease Almanac – April 4, 2025

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from March 29, 2025 through April 4, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Beech (European)
Disease/Disorder:  Phytophthora Canker
Pathogen:  Phytophthora cactorum
County:  Milwaukee

Plant:  Oak (White)
Disease/Disorder:  Brittle Cinder (Suspected)
Pathogen:  Kretzschmaria deusta
County:  Dane

Plant:  Serviceberry
Disease/Disorder:  Lichens
Pathogen:  None
County:  Dane

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Field Crops Icon

Field Crops

No New Diseases

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Forage Crops Icon

Forage Crops

No New Diseases

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Fruit Crops Icon

Fruit Crops

Plant:  Grape
Disease/Disorder:  Phomopsis Cane and Shoot Spot
Pathogen:  Phomopsis sp. 
County:  Sauk

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Herbaceous Ornamentals Icon

Herbaceous Ornamentals

No New Diseases

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Houseplants Icon

Houseplants

No New Diseases

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

Plant:  Spruce (Blue)
Disease/Disorder:  Diplodia Shoot Blight and Canker
Pathogen:  Diplodia sp. 
County:  Dane

Plant:  Spruce (Blue)
Disease/Disorder:  Phomopsis Canker
Pathogen:  Phomopsis sp. 
County:  Dane

Plant:  Spruce (Unspecified)
Disease/Disorder:  Rhizosphaera Needle Cast
Pathogen:  Rhizosphaera kalkhoffii
County:  Dane

Plant:  Spruce (Unspecified)
Disease/Disorder:  Water Stress (Suspected)
Pathogen:  None
County:  Dane

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Vegetable Crops Icon

Vegetable Crops

No New Diseases

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Specialty Crops Icon

Specialty Crops

No New Diseases

(Back To Menu)


Miscellaneous Icon

Miscellaneous

No New Reports

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Wisconsin Disease Almanac – March 28, 2025

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from March 22, 2025 through March 28, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Hornbeam
Disease/Disorder:  Root/Crown Rot
Pathogens:  Phytophthora sp.
County:  Dane

Plant:  Oak (Pin)
Disease/Disorder:  Jelly Fungus (Unidentified)
Pathogens:  None
County:  Dane

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Field Crops Icon

Field Crops

No New Diseases

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Forage Crops Icon

Forage Crops

No New Diseases

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Fruit Crops Icon

Fruit Crops

No New Diseases

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Herbaceous Ornamentals Icon

Herbaceous Ornamentals

Plant:  Coleus
Disease/Disorder:  Downy Mildew
Pathogens:  Peronospora lamii
Counties:  Columbia, Dane

Plant:  Pericallis
Disease/Disorder:  Impatiens Necrotic Spot
Pathogens:  Impatiens necrotic spot virus
County:  Jefferson

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Houseplants Icon

Houseplants

No New Diseases

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

No New Diseases

(Back To Menu)


Vegetable Crops Icon

Vegetable Crops

No New Diseases

(Back To Menu)


Specialty Crops Icon

Specialty Crops

No New Diseases

(Back To Menu)


Miscellaneous Icon

Miscellaneous

No New Reports

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March 2025: March Madness – Three Plant Diseases to Drive You Crazy in 2025

Crazy IconThe 2024 growing season was an amazing time for plant diseases.  Spring and early summer weather was particularly wet, which was favorable for development of an array of fungal plant diseases.  In addition, 2024 was a great year for insect activity, and certain insects that were prevalent last year (in particular aphids and leafhoppers) are notorious for moving pathogens from plant to plant.  Of the diseases that I saw at the UW Plant Disease Diagnostics Clinic last year, the following three are diseases that are likely to recur and have a significant impact in 2025. 

Apple scab

Last year was the best year for apple scab that I can think of in my 26+ years at the PDDC.  The wet weather that occurred as apple and crabapple trees began to leaf out in the spring was perfect for Venturia inaequalis (the apple scab fungus) to infect.  These early infections (characterized by dark, feathery-edged leaf spots) set trees up for an apple scab epidemic as wet weather continued later into the growing season.  Many trees defoliated due to apple scab by mid-summer.  The leaf debris from these trees is where the apple scab fungus has been hanging out for the winter.  As soon as rains start this spring and trees begin to leaf out, spores from this leaf litter will lead to new infections, and we’ll be off to the apple scab races once again. 

To limit apple scab development, remove and dispose of (by burning, burying, or hot composting) any leaf litter that is still hanging around your apple and crabapple trees.  If you have not recently thinned your apple or crabapple trees, consider doing this soon (as long as the buds on the trees have not yet begun to swell).  Thinning improves airflow that promotes more rapid drying of leaves when they get wet.  Drier leaves are a less favorable environment for the apple scab fungus to infect.  For details on pruning trees, check out “Pruning Deciduous Trees” available on the UW-Madison Division of Extension Horticulture website.  There are also fungicide treatments that can be used for apple scab control (see the UW Plant Disease Facts fact sheet on “Apple Scab” for details).  However, treating for apple scab requires multiple, carefully-timed fungicide applications, which can be difficult to achieve for many home gardeners.  If you are planning on planting a new apple or crabapple tree in 2024, make sure you select an scab-resistant variety to avoid apple scab problems in the future. 

Septoria leaf spot of lilac

After a hiatus in 2023 (most likely due to the hot, dry 2023 growing season), Septoira leaf spot of lilac was back with a vengeance in 2024.  Lilacs all over the state had leaves that first exhibited spotting, then turned partially or fully brown starting at the bottom of shrubs and working up the plant.  The culprit was a species of Septoria, a fungus related to (but distinct from) the organism that causes Septoria leaf spot of tomato.  The browning caused by Septoria on lilac tends to be quite dramatic, but luckily, the disease is not lethal. 

As with apple scab, good clean up of leaves that have fallen from affected lilac shrubs is the place to start in managing Septoria leaf spot.  Routine pruning/thinning (see “Pruning Deciduous Shrubs” for details) to open up lilac canopies and promote rapid drying of leaves will also help keep this disease at bay.  Use of fungicides (in particular chlorothalonil-containing products labeled for use on woody ornamentals) to manage the disease may also be useful.  However, early applications (as shrubs begin to leaf out) and additional regular follow-up applications (if there is wet weather) are critical for control of this disease.  Applying fungicides is a lot of work, and if you are unable to commit to the regular applications that are needed, then I recommend foregoing any applications at all. 

Aster yellows

Aster yellows is a phytoplasma disease that affects 300+ herbaceous plant species in 40+ plant families.  Phytoplasmas are bacteria-like organisms that certain insects (most commonly leafhoppers) move from plant to plant.  These insects feed in the phloem (i.e., the food-conducting tissue) of plants, and acquire phytoplasmas (and subsequently drop them off) as they feed.  In 2024, high numbers of aster yellows leafhoppers (the specific leafhopper that transmits the aster yellows phytoplasma) led to an increase in aster yellows.  Once infected, perennial plants remain infected, with the phytoplasma concentrating in plants’ crowns and roots in the fall, as plants go dormant for the year.  The phytoplasmas survive the winter in these tissues and recolonize new growth as it emerges in the spring.  Given the high incidence of aster yellows in 2024, I expect to see a lot of this disease in 2025.  Typical symptoms associated with aster yellows are plant stunting; yellow, orange, or purple leaves; distorted leaves; leafy, green flowers; and brooming (i.e., production for clusters of plant parts). 

Unfortunately, the only management for aster yellows is to remove infected plants.  You don’t have to be particularly careful about disposing of these plants.  Once plants have been dug up and have wilted, they are no longer attractive to leafhoppers (and other insects) that could potential move the pathogen to other plants. 

Need help?

Hopefully, my predictions for diseases that will be prevalent in 2024 will be wrong.  That said, you will likely encounter plant diseases of some kind this coming growing season.  If you need help in identifying whatever diseases you do encounter or need advice on plant disease control, please feel free to contact me at (608) 262-2863 or pddc@wisc.edu.  For more information on plant diseases in general and their management, be sure to check out the UW-Madison PDDC website (https://pddc.wisc.edu/).  To keep up to date on clinic activities and resources, follow the PDDC on Facebook, Twitter (X), or Bluesky (@UWPDDC), or subscribe to the clinic’s listserv, UWPDDCLearn (by emailing or phoning the clinic to subscribe). 

Happy gardening, everyone!!

Wisconsin Disease Almanac – March 21, 2025

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from March 15, 2025 through March 21, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Oak (Bur)
Disease/Disorder:  Coryneum Canker
Pathogens:  Coryneum sp.
County:  Dane

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Field Crops Icon

Field Crops

No New Diseases

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Forage Crops Icon

Forage Crops

No New Diseases

(Back To Menu)


Fruit Crops Icon

Fruit Crops

No New Diseases

(Back To Menu)


Herbaceous Ornamentals Icon

Herbaceous Ornamentals

No New Diseases

(Back To Menu)


Houseplants Icon

Houseplants

No New Diseases

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

Plant:  Pine (Scots)
Disease/Disorder:  Brown Spot
Pathogens:  Lecanosticta acicola (Mycosphaerella dearnessii)
County:  Clark

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Vegetable Crops Icon

Vegetable Crops

Plant:  Potato
Disease/Disorder:  Bacterial Soft Rot
Pathogens:  Pectobacterium atrosepticum, Pectobacterium carotovorum subsp. carotovorum, Pectobacterium parmentieri
Counties:  Portage, Waushara 

Plant:  Potato
Disease/Disorder:  Corky Ringspot
Pathogens:  Tobacco rattle virus
County:  Portage 

Plant:  Potato
Disease/Disorder:  Dry Rot
Pathogens:  Fusarium sp.
Counties:  Portage, Waushara 

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Specialty Crops Icon

Specialty Crops

No New Diseases

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Miscellaneous Icon

Miscellaneous

No New Reports

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Wisconsin Disease Almanac – March 14, 2025

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Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from March 8, 2025 through March 14, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

No New Diseases

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Field Crops Icon

Field Crops

No New Diseases

(Back To Menu)


Forage Crops Icon

Forage Crops

No New Diseases

(Back To Menu)


Fruit Crops Icon

Fruit Crops

No New Diseases

(Back To Menu)


Herbaceous Ornamentals Icon

Herbaceous Ornamentals

No New Diseases

(Back To Menu)


Houseplants Icon

Houseplants

Plant:  Money Tree
Disease/Disorder:  Anthracnose
Pathogen:  Colletotrichum sp.
County:  Fond du Lac

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

No New Diseases

(Back To Menu)


Vegetable Crops Icon

Vegetable Crops

Plant:  Potato
Disease/Disorder:  Powdery Scab
Pathogen:  Spongospora subterranea subsp. subterranea
County:  Adams

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Specialty Crops Icon

Specialty Crops

No New Diseases

(Back To Menu)


Miscellaneous Icon

Miscellaneous

No New Reports

(Back To Menu)


 

Wisconsin Disease Almanac – March 7, 2025

No Date Icon

Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from March 1, 2025 through March 7, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Maple (Norway)
Disease/Disorder:  White Rot (on dead wood)
Pathogen:  Dryad’s saddle (Polymorphus squamosus)
County:  Dane

Plant:  Tree (Unspecified)
Disease/Disorder:  Phomopsis Gall
Pathogen:  Phomopsis sp.
County:  Dane

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Field Crops Icon

Field Crops

No New Diseases

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Forage Crops Icon

Forage Crops

No New Diseases

(Back To Menu)


Fruit Crops Icon

Fruit Crops

No New Diseases

(Back To Menu)


Herbaceous Ornamentals Icon

Herbaceous Ornamentals

No New Diseases

(Back To Menu)


Houseplants Icon

Houseplants

No New Diseases

(Back To Menu)


Needled Woody Ornamentals Icon

Needled Woody Ornamentals

Plant:  Spruce (Unspecified)
Disease/Disorder:  Water Stress (Suspected)
Pathogen:  None
County:  Milwaukee

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Vegetable Crops Icon

Vegetable Crops

Plant:  Cabbage
Disease/Disorder:  Cucumber Mosaic
Pathogen:  Cucumber mosaic virus
County:  Flagler (FL)

Plant:  Cabbage
Disease/Disorder:  Impatiens Necrotic Spot
Pathogen:  Impatiens necrotic spot virus
County:  Flagler (FL)

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Specialty Crops Icon

Specialty Crops

No New Diseases

(Back To Menu)


Miscellaneous Icon

Miscellaneous

No New Reports

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Wisconsin Disease Almanac – February 28, 2025

No Date Icon

Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from February 22, 2025 through February 28, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Oak (Unspecified)
Disease/Disorder:  Armillaria Root Disease (Suspected)
Pathogen:  Armillaria sp.
County:  None (Republic of Singapore)

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Field Crops Icon

Field Crops

No New Diseases

(Back To Menu)


Forage Crops Icon

Forage Crops

No New Diseases

(Back To Menu)


Fruit Crops Icon

Fruit Crops

No New Diseases

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Herbaceous Ornamentals Icon

Herbaceous Ornamentals

Plant:  Calibrachoa
Disease/Disorder:  Powdery Mildew (Suspected)
Pathogen:  Oidium sp.
County:  Taylor

Plant:  Hosta
Disease/Disorder:  Physical Abrasion (Suspected)
Pathogen:  None
County:  Jefferson

Plant:  Pachysandra
Disease/Disorder:  Volutella Blight
Pathogen:  Volutella pachysandricola
County:  Waukesha

Plant:  Pachysandra
Disease/Disorder:  Winter Burn
Pathogen:  None
County:  Waukesha

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Houseplants Icon

Houseplants

No New Diseases

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

Plant:  Pine (Austrian)
Disease/Disorder:  Diplodia Shoot Blight and Canker (Suspected)
Pathogen:  Diplodia sp.
County:  Racine

Plant:  Pine (Austrian)
Disease/Disorder:  Water Stress (Suspected)
Pathogen:  None
County:  Racine

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Vegetable Crops Icon

Vegetable Crops

Plant:  Rosemary
Disease/Disorder:  Powdery Mildew (Suspected)
Pathogen:  Oidium sp.
County:  Fond du Lac

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Specialty Crops Icon

Specialty Crops

No New Diseases

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Miscellaneous Icon

Miscellaneous

No New Reports

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Wisconsin Disease Almanac – February 21, 2025

No Date Icon

Compiled by Brian Hudelson and Dante Tauscheck

The following diseases/disorders were identified at the Plant Disease Diagnostics Clinic from February 15, 2025 through February 21, 2025.

 

 


Broad-Leafed Woody Ornamentals Icon

Broad-Leafed Woody Ornamentals

Plant:  Oak (Red)
Disease/Disorder:  Brittle Cinder (Suspected)
Pathogen:  Kretzschumaria deusta
County:  Dane

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Field Crops Icon

Field Crops

No New Diseases

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Forage Crops Icon

Forage Crops

No New Diseases

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Fruit Crops Icon

Fruit Crops

No New Diseases

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Herbaceous Ornamentals Icon

Herbaceous Ornamentals

No New Diseases

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Houseplants Icon

Houseplants

No New Diseases

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Needled Woody Ornamentals Icon

Needled Woody Ornamentals

No New Diseases

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Vegetable Crops Icon

Vegetable Crops

No New Diseases

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Specialty Crops Icon

Specialty Crops

No New Diseases

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Miscellaneous Icon

Miscellaneous

No New Reports

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