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Downy Mildew Report Form

Basil Downy Mildew Report Form

Your report is important to everyone growing basil! Confirmed reports document where new occurrences are most likely to be, thereby forewarning others growing basil, and provided information adds to scientific knowledge about development of this disease.

If you are reporting from outside the USA and Canada, please send your information in an email to Meg McGrath at

* indicates required fields

Reported By:



Host Crop(s):*

Sweet Basil (Ocimum basilicum)
Other basil - please specify:


Type of Planting*

Home in-ground garden
Home potted plants
Commercial field crop
Commercial greenhouse crop
Research in-ground plot
Sentinel in-ground plot
Research greenhouse planting
Other - please specify:


Size of planting (or approx # of plants):

Estimated percent of plants infected (incidence) %

Estimated percent of overall leaf area diseased (spores present) %

Date First Symptoms Seen*
(i.e., when were symptoms first noticed?):

Estimated Date Symptoms Started
(i.e., when did symptoms first appear?):

Control Products/Practices Used (if any) and their effectiveness:

Method of Verification of Spores Present:


Location Being Reported (where is the disease?):

Use a full address or series of components: "Street address, City, State, Zip", "City, State", "County, State"
Or use coordinates:
Latitude (Deg N):
Longitude (Deg E):

Or click on the map below to determine this location with a marker.

Please note that the following fields will be calculated based on your above location! Note: You can only change these fields with the map or a "Lookup" button above

County Name:*


Narrative Account of Situation (Please be detailed):

Past Occurrences of Basil Downy Mildew:
Have you seen downy mildew on your basil before? If so, what years?
Any years your basil did not have downy mildew?


Confirmed By:




If you are not yet on the Confirmed Reporter List, which includes plant pathologists and those who have submitted photographs to confirm a previous report, please send a 'Basil Downy Mildew Confirmation Request' email with photographs of symptoms to Most important is close up image of the leaf underside showing the pathogen's growth as this is diagnostic.