Oregon State University Plant Clinic

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Plant Disease Diagnosis

• How to submit a sample
• Plant disease sample form
• Sample fees
• Directions to clinic

Insect ID

• Insect ID sample form
• OSU Insect ID Clinic

Plant/Weed Identification

OSU Nematode Testing Service

Information on diseases

• OSU Online Guide to Plant Disease Control
• Monthly highlights
• Diagnoses by county
• Fact sheets
• Problems of stored garlic
• Rhodococcus and Agrobacterium

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Problems of Stored Garlic

Click on an image to enlarge it.
For information about that problem click on the link next to the images of interest.
The information can also be obtained in printable format as a .pdf file - just click on the link with the pdf extension.

Cloves or heads have a pinkish cast to them: Fusarium rot Fusarium rot pdf

 

Cloves or heads are turning green: Blue mold Blue mold pdf

 

Cloves or heads with gray mold: Botrytis Botrytis pdf

 

Individual cloves appear translucent: Waxy breakdown Waxy breakdown pdf

 

Individual cloves with brown streaks or indents: Dry bulb mites Mites pdf

 

Irregular dark areas on the outer scales of the garlic heads, usually near the base of the bulb: Embellisia Skin Blotch Embellisia pdf

 

Tiny amber colored specks that are slightly raised above the white portions of the clove: Stipple spot Stipple spot pdf

 

For information on growing garlic in the Pacific Northwest see:

http://hort-devel-nwrec.hort.oregonstate.edu/garlic.html

http://www.tricity.wsu.edu/~cdaniels/profiles/Garlic.pdf