Powdery Mildew- treating soil?
sunnyvalley
12 years ago
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Kimmsr
12 years agoRelated Discussions
Please Help! White powdery mildew on my bonsai roots and soil!
Comments (1)What source are you using for your water? It could just be calcium build up from hard water or it could be ...? could you describe where the tree is being kept and what sort of soil you are using, that sort of thing. Might help someone else make a more educated guess than mine....See MoreOnce you get powdery mildew, how do fix the soil for next?
Comments (7)I know the answer to this!!!! I am soooo excited!!!!! :D :D :D Ok, milk. You want to dilute the milk so it is about 10-20% of what you have, definitely less than 30% or it will make something else bad that you don't want to happen happen, and spray it on every week or two (don't do it too often or the plants will be unhappy), and this will prevent a lot of powdery mildew. It is more of a preventative measure but you can try it if you see just a little, well, you might as well try it when you see a lot, but it's better to start before you see it at all. This is probably the only answer I will ever know, thank you so much :D...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 Morebad case of Powdery Mildew - How to treat?
Comments (5)I do not use fungicides so my advice is more in the organic way of growing. Powdery mildew does do better in dry conditions as when it rains it washes the spores off the plant. It happens usually when night time temperatures are low and day time temperatures are warm. If this happens every spring then you can use a horticultural oil (like winter oil but more diluted) but this should be done carefully and in cool temperatures because when applied in warm weather it can burn foliage. This works like a coating that the mildew spores cannot penetrate and is best done in early April before mildew is present. Right now it might be best to cut back rose and wait for better weather. Overhead watering can help, but only if it is done early in the day. The weather will change and the mildew problem will go away, but meanwhile it may really slow down the growth of the plant and it may not be attractive for the remainder of this season if it has had a severe case of mildew....See Moremaplerbirch
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