Powdery Mildew- treating soil?
sunnyvalley
12 years ago
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Kimmsr
12 years agoRelated Discussions
mycelium in soil = powdery mildew??
Comments (4)Powdery Mildew is not just one plant disease but any of several and is caused by spores that travel, mostly, on the wind. When my plants have had this I have found that either a mixture of 1 teaspoon of Baking Soda in 1 quart of water or a 50/50 mixture of fat free milk and water is effective in controlling it. There is some research that does show that Potassium Bicarbonate works better then does Sodium Bicarbonate, but I find the Potassium Bicarbonate more difficult to obtain. Here is a link that might be useful: About Powdery Mildew...See Morepowdery mildew in soil?
Comments (5)What sue said ...... PM afflictions are more the product of cultural conditions and some of our habits than of where the spores reside, though good housekeeping can help reduce the likelihood of infection somewhat. Clean up the old leaves & stalks in the fall & rake the area. Plant in the open and in full sun where air circulation is good. Try to avoid wetting foliage as much as possible, especially late in the day when foliage won't have an opportunity to dry quickly. Fungal spores need an incubation period that includes moist conditions and a favorable temperature range for intervals that vary by species (of fungus). Denied the incubation period the fungus can't get a start. While there are some fixatives that will clear up mild cases of PM and work well as prophylactics (ask if interested), the best approach is prevention. Al...See MorePowdery Mildew on potted JM - How to treat?
Comments (1)Japanese maples are very sensitive to foliar applications of any pesticides. They can often do more damage than the problem you are trying to control. I would limit any treatment to something like Cornell formula (1 Tbsp baking soda to gallon of water with a few drops of salad oil) or just a 50-50 milk and water mixture. Both of these approaches work by altering the pH of the leaf surface, making it inhospitable for the development of fungal spores. And are unlikely to create a phytotoxic reaction. To be on the safe side, apply very early in the day or just before dusk to minimize sun exposure. The primary reasons any plant contracts PM is due to climate and/or cultural conditions. Provide adequate air circulation and keep any water off foliage as much as possible. Often PM develops when humidity is high but soils are dry -- you may need to water potted JM's a bit more frequently to balance this out. Soil should always be just moist to touch - not too dry nor too wet....See MoreHelp with "is it powdery mildew"? Seems a bit different.
Comments (9)South Carolina. I am not convinced it is powdery mildew either-I cannot find anything that matches its description. This time of year though we got it on our butternuts. They are doing fine though..everything else is doing great. Even the eggplants in the same bed. I pulled the peppers as it kept coming back and wanted to prevent the spread to healthy peppers. I thinned and spaced the remaining tomatoes and they seem to be doing ok. The tomatoes were thriving, with he exception of some early blight which I had kept controlled by routine pruning (and only when the leaves are dry). I had sprayed the milk for preventive purposes...though I am not inclined to ever do that again. Next year I plan on adding some azomite to my soil- and I may try to figure out what to do with those beds next year....See Moremaplerbirch
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