"Oh and I forgot, the seed is the original source of contamination. A 1-2% PerPose soak for 45 seconds in a small tea strainer, followed by a hair dry . Rub apart, and sow immediately. No hard to germination. Use PerPose to…"
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Julie Rubaud's Discussions
Downy Mildew on basil in greenhouse
17 Replies
We are a certified organic greenhouse and were invaded by basil downy mildew this year for the first time. None of our basil was sale-able. We tried about 10 different varieties, a couple of…Continue
Started this discussion. Last reply by Meg McGrath Jan 2.
Used pot filler
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I am looking for used pot filling equipment. I am in Vermont, and just beginning to look around. Does anyone have any leads about where to search? Any favorite types/brands? We work with bulk soil…Continue
Started this discussion. Last reply by Walter Gaipa Sep 22, 2011.
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Mark Langan left a comment for Julie Rubaud"Hi Julie
To your question, I can now confirm 2% PerPose (not Oxidate) plus 1% Suffoil-X per gal water. Must have great coverage. I use a gas powered Stihl backpack spray. Best spray equipment I ever invested"
Meg McGrath replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"I am a vegetable pathologist and an avid gardener who has been studying basil downy mildew and watching it develop in my garden every summer since 2008. I have evaluated organic and conventional fungicides on field-grown plants. And…"
Walter Gaipa replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Hi Mark,
Sounds like you have a plan of attack. I am guessing you are in Washington State? I know they are very strict with organic regulations. Any phosphites that they might allow?
I will try some of your ideas. There is no "silver…"
Mark Langan replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Hi Walter, Happy New Year
I am now using Preclude (which does not have acetic acid like Oxidate), and have used it at 2% with no burn. I will be trying 3% here soon. For sterilizing the greenhouse, remove all basils-then…"
Walter Gaipa replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Here is a realy good link for info on BDM from Meg McGrath of the Cornell Research Lab in Riverhead NY.
http://vegetablemdonline.ppath.cornell.edu/NewsArticles/BasilDowny.html ;"
Walter Gaipa replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Hi Mark,
Thanks for sharing your experiences. We had pretty good luck with keeping the greenhouse temperature above 70 degrees, as BDM thrives at 68. It seems to have helped control the symptons. Oxidate sprays had very little effect. We tried…"
Mark Langan replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Hi there everyone.
Sorry I'm late to this discussion, I hope everyone is still following. The holidays delayed in getting my profile setup are at fault. First question, is this disease truly systemic, or semi-topical? …"
Chris Sawyer replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"I use that concentration to cure, for maint. I use 1/oz gallon. I tried the 2 oz ratio on plants that were beyond saving, it cleaned them up. If the disease has progressed you have nothing to lose anyway. I spray after every rain, and every 7 to 10…"
Walter Gaipa replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Chris,
Any issues with spraying Oxidate at 2 oz /gallon on basil? That is a pretty high rate and basil is a sensitive plant. Since Oxidate has no residual benefit how often do you spray?
"
Paul Cross replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Cease and Actinovate both carry OMRI labels and thus are pretty easy to get approval to use in an organic regulation. It would behoove the above poster to get his products OMRI listed if he wanted to make it easy for organic growers to consider…"
Douglas W. Speed, Sr replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"I reading the replies I see several folks have suggested the use of Cease and Actinovate. These products contain only one strain of bacillus subtills. I suggest you try the Revive version of Quantum Growth products which contains a consortium of…"
"Changing cultural practices is the only way to go until someone figures out a better organic product. When I start out my basil and it is in a small area of the greenhouse I place small box fans on the benches for better air movement. If the…"
Lloyd Traven replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Have you tried Cease, from Bioworks? Not aware of any phosphites that are organiic certified."
Chris Sawyer replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"keep the humidity under control and increase the air flow, oxidate @ 2 oz/gallon is what we use. I kept our basil going until the end of Nov in our house with no heat this year."
Walter Gaipa replied to Julie Rubaud's discussion Downy Mildew on basil in greenhouse"Hi Julie,
How did you make out with the downy mildew basil issue this year?
Walter
Marion Gardens, Herbs"
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Comment Wall (2 comments)
- At 8:38am on May 23, 2013, Mark Langan said…
Oh and I forgot, the seed is the original source of contamination. A 1-2% PerPose soak for 45 seconds in a small tea strainer, followed by a hair dry . Rub apart, and sow immediately. No hard to germination. Use PerPose to clean benchs, floors and plastic.
- At 8:33am on May 23, 2013, Mark Langan said…
Hi Julie
To your question, I can now confirm 2% PerPose (not Oxidate) plus 1% Suffoil-X per gal water. Must have great coverage. I use a gas powered Stihl backpack spray. Best spray equipment I ever invested
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