I believe we've been hit with blight:
[url=https://www.flickr.com/photos/46713538@N03/5732329126/][img]https://farm4.static.flickr.com/3055/5732329126_71f89b3657.jpg[/img][/url]
[url=https://www.flickr.com/photos/46713538@N03/5731782717/][img]https://farm3.static.flickr.com/2438/5731782717_1f4ca85d49.jpg[/img][/url]
[url=https://www.flickr.com/photos/46713538@N03/5732329372/][img]https://farm4.static.flickr.com/3143/5732329372_6ea8d8ebda.jpg[/img][/url]
I've searched a bit, and found two solutions to attempt to fight the issue. One is a milk solution, the other is to use copper sulfate, or a copper & lime mixture (dissolved in water).
While I would like to stay organic, I am not completely opposed to non-organic methods, and from what I understand, the copper sulfate could go either way. The biggest concern seems to be its build up in the soil.
Would any of you recommend one method over the other? I was thinking of starting with one application of the copper and then continuing with the milk solution.
Milk Solution or Copper Sulfate?
Last edited by NooraK on Sat May 21, 2011 12:22 pm, edited 1 time in total.
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- Rogue11
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Silly question, where do you get copper sulfate?lorax wrote:I use very low doses of copper sulfate (1 tsp in 1L) right in the milk solution, and it works wonderfully for me. There isn't enough copper that way to accumulate in the soil, and the one-two punch seems to knock the blight right off the tomatoes and prevent it spreading.
I have used milk solution for powdery mildew before; you think the mix will work on that too?
Thanks.
Hubby brought some home from the home improvement store.Rogue11 wrote:Silly question, where do you get copper sulfate?lorax wrote:I use very low doses of copper sulfate (1 tsp in 1L) right in the milk solution, and it works wonderfully for me. There isn't enough copper that way to accumulate in the soil, and the one-two punch seems to knock the blight right off the tomatoes and prevent it spreading.
I have used milk solution for powdery mildew before; you think the mix will work on that too?
Thanks.
- lorax
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I buy copper (II) sulfate at my local farm supply/agribusiness store, but I could also get it at the chemical store - it's cheaper at the ag store. It pays to phone around.
Copper-ammonium complex will work on fungal diseases fairly well but it's terrible against bacterial blights - the difference is in the ammonium (a hydrogenated nitrogen compound) bonded to the copper ions, rather than sulfate (an oxygenated sulfur compound). However, give it a shot mixed with milk - at the very least it will take care of the mildew problem.
Copper-ammonium complex will work on fungal diseases fairly well but it's terrible against bacterial blights - the difference is in the ammonium (a hydrogenated nitrogen compound) bonded to the copper ions, rather than sulfate (an oxygenated sulfur compound). However, give it a shot mixed with milk - at the very least it will take care of the mildew problem.
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