Basil Downy Mildew Monitoring Records 2018
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State (or country if not in US)Date Symptoms SeenEstimated Date Symptoms StartedReporter NameReporter E-mail or other contact infoField, Greenhouse, or GardenLocationPlant and Planting SizeSeverityHow DiagnosedConfirmationAdditional Description and Comments; have you seen before?
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New Yorksummer 2017summer 2017
Margaret Tomlinson
margaretdonsbach@gmail.com
gardenCatskill, NYbasil, seed-grownmoderateJohnny's article
had never seem this before on basil, but recognized it as downy mildew and thought the basil had been infected by nearby cucmber and squash plants; will try neem oil this year
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PennsylvaniaMid-MayEarly MayJennifer W
thewhatleys.shared@gmail.com
WalmartParkersburg, PASweet basil plantSevere
very visible spores on leaves
Possibly purchased with the mildew; husband noted yellowing within first week of purchase (I was out of town)
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NCmay 24thMay 24lukepotschapel hilltransplantcoveredpictures
purchased at lowes / all plants have same symptoms when returned to lowes
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Maryland7/14/21077/5/2017Linda Genoveseljgtennis@comcast.netGardenColumbia,MdBasil Full growncoveredpictures
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Tennessee7/7/18
purchased 7/4/18
Kristenplant@AMOTHERSITE.COMpots on porch
thompsons station tn
sweet basil/full grownSevereweb search
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Minnesota7/6/20186/1/2018Jenniferjenniferkosch@yahoo.com
raised bed garden
Minneapolis, MNGenovese
moderate to severe
web search
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North Carolina7/4/20186/20/2018Susansusancera@alumni.duke.eduGardenRaleigh, NCsweet basil/full grown
moderate to severe
Cornell examples
We have seen this each of the past few summers. Basil starts out strong and as it matures it gets the mildew.
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Illinois7/4/187/2/2018Nicole Virgilnvirgil@me.com
raised bed garden
Elmhurst, ILGenovesesevereweb searcn
Saw it in 2017. Didn't know what it was and it wiped out all 13 basil plants in a few weeks. This year pruned heavily and am waiting to see if we make it through.
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Michigan7/2/18within a weekD.pots on porchOakland County
grown from Burpee SB seedl
web pics
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Illinois7/2/2018within a weekChris Apots on porchGeneva, ILsweet basil/full grown
moderate to severe
web pics
photos and wet paper towel test; confirmed by sending photos to M McGrath
First time seeing this in my garden, plant was from Big-Box store, potting soil new this season
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North Carolina6/30/186/24/18Perdita Holtzperdita_holtz@yahoo.com
raised bed garden
Chapel Hill, NCGenovese
moderate to severe
web search/pics
I lost my 2017 plants to this as well and, if I recall correctly, my 2016 plants also were affected, but not as badly as 2017 and 2018. Home started seed (Botanical Interested, packed for 2010).
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Minnesota6/29/18Barb Gasterlandbarbski1@comcast.netGardenMinneapolis, MNBasil GenoveseSevere
Cornell examples
This is the first time I have had this problem.I have two afftected plants, I have other varieties that seem to be fine.
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New Jersey6/28/186/28/18
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Tennessee6/27/186/20/18Zach Hansenzhansen1@utk.edu
field (sentinel plot)
Knoxville, TNSweet basilMildSporulation
microscope; confirmed reporter
University of Tennessee Organic Cropping Unit - basil sentinel plot next to cucurbit downy mildew sentinel plot - had been reported in other parts of Tennessee already this year
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South Carolina6/25/20186/18/2013Anthony Keinathtknth@clemson.eduGardenCharleston, SC
Sweet basil, a few plants
Slight
Symptoms and sporulation
Microscope; confirmed reporter
Clemson University's Coastal Research and Education Center Urban Research and Demonstration Area. Yes, have seen many times over the years.
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Tennessee6/25/18
couple of weeks ago
Maryanna Clarkemaryanna@twtp.org
pots in front of house
Hendersonvillesweet basil/full grownsevereweb search
I have 3 pots. One pot from last year with old soil is not so bad; 2 other pots with soil bough this year are much more severe.
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Delaware6/23/20186/19/2018GardenNew Castle, DE
Sweet Basil Various sizes
Moderate/severe
Black spores/fuzzy mold under leaf
The plants were started from different seed packages of Sweet Basil/Genovese Basil. They were fine for months, until late June when some began turning yellow. Then after a rainy day, I noticed fuzzy black mold starting to appear on the leaf undersides of all of the basil plants (all 5 plants affected)
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Alabama6/13/20186/6/2018J Jacobijacobjc@auburn.eduGardenBirmingham, ALSweet BasilModerate
abundant sporulation
Microscope
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Tennessee6/12/20186/1/2018A Windhamawindham@utk.eduGardenFranklin, TnSweet basil 18"Moderate
abundant sporulation
hand lens; confirmed reporter
Observed in multiple plots in a community garden
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Kansas6/12/20186/8/2018A McCulloughGardenLenexa, KSSweet Basilmild-moderate
visual inspection
photos at UConn extension website
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District of Columbia
6/10/2018
Within the last week
H Levine202-380-8768
Garden (started from seed, Southern Exposure catalogue)
Washington , DC
Sweet basil (Genovese)
Moderate Black spots
Last year lost all three plants in August. This year much earlier, possibly due to wet spring/summer. So far only one plant affected .
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California6/10/18
Within the last week
J Farkas323.939.9880
Garden (in pots)
Los Angeles, CASweet basil transplantSevere
Black & brown lesions
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Mississippi6/7/185/25/18GWindhamgarywindham75@yahoo.combig box storeStarkville, MSSweet basil transplantModerate
abundant sporulation
A Windham; confirmed reporter
Yes,
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California6/6/185/10/18Edwin TomYoye_tomyoy@yahoo.comgardenSouth Pasadena
sweet basil, seed grown and plants from Trader Joes market
severespores,pictures
photos sent to Cornell, McGrath
first batch from seed, later added plants from containers from Trader Joes market, yellowing started on the purchased plants then spread to the seed started plants.
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Virginia6/5/185/25/18Jose Garciajosefg1@vt.edu
Community garden
Pungoteague, VAbasil plantsSevereSpores VisibleMicroscopeYes
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Tennessee6/4/2018May, 2018Gerry O'Neilluglysock@gmail.comGarden CenterOak Ridge, TNBasil transplantsModerate
visual inspection
Seen at local Garden Center, labeled "Papa Joe's Plants." Recognised symptoms. Did not purchase.
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Virginia6/2/185/30/18Jill Pollokjrp5078@vt.eduGardenMachipongo, VABasil PlantsModerateSpores Visible
Microscope; confirmed reporter
Yes
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Maryland5/31/185/28/18Guy Kilpatricghkilpat@umd.eduGreenhouse
Upper Marlboro, MD
Seedlings/full grModerate
visual inspection
Varieties: Dolly and Aroma2, grown from seed purchased from Johnny's Selected Seeds; dark spots under leaves and generalized yellowing. Identified on 1 week old and 3 week old seedlings in cell trays.
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Georgia 5/25/185/2018N. BrunnerGardenAtlanta, GABasil full grownModerate
visual inspection
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Georgia 24 May 201815 May 2018Erin Aegdwolfe@gmail.com flower potsNewnan GAbasil transplantmoderateCornell articlenone
Purchased two basil plants at Lowes. Plants appeared to be fine until weather brought frequent rain and cloud cover. The plants have since been moved to a drier location, and all infected leaves pinched off. Waiting to see if that and fungicide applications help.
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Virginia5/23/20185/20/2018Courtney AGardenChantilly, VAbasil full grown
moderate/severe
pictures
had 2 different basil plants from different stores, one was infected (from home depot), then it moved to the next plant (local nursrey) the following day
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Maryland20 May 2018
13-20 May 2018
Daniel Mueller
daniel.c.mueller09@gmail.com
Flower Boxes
Montgomery Village, MD
Basil transplantmild-moderate
description/pictures
photos sent to MT McGrath
First week after transplanting was unusually cool and rainy
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Texas5/15/201805/05/2018Sarah AGardenAustin, TX
Basil transplants/seedings
ModeratePictures
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new York5/2/20185/2/2018Anthony Dtwinmaker3@msn.comgardenpleasantville,NYbasil transplantseverecornell article
bought at home depot already affected. I noted it after brought home. Progressed rapidly.
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Virginia05/01/1804/27/18Chris Lewisvlmchris@aol.comGardenNewport News,VABasil transplantsSevere
Black spores under leaf
Purchased plants 4/27/18. Probably already infected
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Virginia1 May 2018May 2018Jamie Harris
harris.charliebrown@gmail.com
GardenVirginia Beach, VABasil transplantModerate
description/pictures
purchased Sweet and Pesto Party Basil from Home Depot
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Florida04/28/201804/20/2018Yuki Yamasakiyukiko@cutepig.comGardenSafety Harbor, FLBasil Full growncoveredPictures/article
purchsed potted organic basil from Trader Joes, it was healthy about a month, now infected
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texas4/7/20184/2/2018LaRae Alcidorlralcidor@gmail.com gardenPasadena, Txbasil transplantsmoderate
description/pictures
affected 2 plantings
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Florida3/1/20181/15/2018Anthony Meolaameola58@gmail.comGardenPlantation,Fl.Basil transplants
moderate/severe
descriptionaffected 3 different plantings
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Florida2/27/20182/25/2018Rose Derrickrosed@tampabay.rr.comGardenRiverview, FLBasil Full grownCoveredPictures
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New York6/30/176/1/17John Macdonaldbestsafe@capital.netgardenCambridge, NYSeedlings/full grSevereCornell article
Lost 2 lg plantings in 4 raised beds; 10:1 clorox solution 4" of topsoil w/ black pastic
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Ohio
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Louisiana07/14/182013 yearlyGeorge Athertongnsatherton@att.netgardenBaton Rouge, La.Full GrownSevere
LSU plant pathology
confirmed by pathologist
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Ohio07/16/18just nowSusan Stewartsstewart@ultimatecloth.comearthboxDelaware, OHFull GrownSeveregoogle
Have never seen this before. The plants have been large and healthy with many cuttings - then just started seeing a lighening of the leaves and when I cut some of the healthiest ones, I noticed a grey powdery film on underside of the leaves.
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New York 07/17/18Colleen Marroncolleenjim@optonline.netgardenMiller pl, NYFull grownseverecornell article
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Illinois7/18/183-4 days?Kimberly Hussbsktrn@aol.comgardenYorkville, ILmidgrowthsevereNPR/Cornell
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