Powdery Mildew
northspruce
18 years ago
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sierra_z2b
18 years agomcav0y
18 years agoRelated Discussions
Is this powdery mildew on my Oakleaf?
Comments (11)Ok, I dug a little trench around it enough to make sure there aren't any maple roots intruding. Its definitely not wet. No spider mites. It seems very well rooted and I didn't dig if up completely; I felt like I would disturb it too much? The leaves on one side definitely seem like they have some sort of mildew or fuzz on them. I don't like to use sprays but the garden store suggested Advanced rose and flower 2 in one spray. I will give it a try. I did fertilize it with osmocote in early spring and used compost. I really don't want to lose it. Thanks for taking the time to help.......See Morepowdery mildew cure
Comments (2)Cucurbits - squashes, zukes, cukes, melons, etc. - are extremely prone to PM unless selecting a variety specifically bred to be resistant. Much of it's due to their growth habit. They lay close to the ground and produce an abundance of pretty big leaves, both of which reduce air circulation, one of the key elements of PM development, as well as tending to keep the soil area rather dry (also a factor). Trellising these types of crops can go a long way in discouraging PM but not all cucurbits respond well or are adaptable to that sort of growth. Almost NO fungicides are curative - they are only preventative and need to be started very early in the growing season to be very effective although they will help to reduce the spread to unaffected foliage. Unfortunately, PM spores rapidly become resistant to single fungicides so best to rotate through 2 or 3 different ones to maximize effectiveness. And they all work more or less with a similar degree of efficacy - potassium bicarb, milk, neem oil, hydrogen peroxide, chlorothalonil or sulfur sprays PM tends to infect the oldest foliage first so removal of heavily damaged basal leaves should help. As will deep watering at the root zone to prevent the soil from drying excessively....See MorePowdery mildew on nectarines
Comments (4)That does look like powdery mildew. It’s also usually one of the easiest issues to get rid of. One of the best steps is to be diligent about clean orchard management every year. If you’re going the organic route, wettable sulfur can be used for powdery mildew. Many fungicides used for brown rot control are effective against powdery mildew as well. If the infestation isn’t too bad, you can clean off the fruit, and still eat it. I’ve cleaned my fruit with vinegar to get rid of the powdery mildew and then left it on the tree to ripen.Copper fungicide can also be sprayed on every part of your fruit tree, including the fruit. Nectarines, in my part of the country are one of the harder fruits to grow. Regular rotational fungicide management is a must for us. Below is a solid list of fungicides that work for the issue you have. Good luck! https://ipm.ucanr.edu/agriculture/nectarine/powdery-mildew/...See MoreMini rose bush / powdery mildew?
Comments (1)duplicate post.. answers here: https://www.houzz.com/discussions/6376913/mini-rose-bush-powdery-mildew#n=4...See Morenorthspruce
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