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Eglantyne Powdery Mildew

AR

Eglantyne Powdery Mildew

by 3 years ago
3

My Eglantyne Rose has patches of powdery mildew which I have tried to treat with Rose Clear unsuccessfully. Should I continue treating bearing in mind the spray states to use up to 4 times a year? I have read that removing affected foliage is another option but would mean cutting a significant amount off of the Rose. Any help would be appreciated!

MM
3 years ago
I'm sorry to see that your rose has powdery mildew. This disease is very often a symptom of dryness at the roots, do I see in your last picture that it is growing in a pot? I wonder if you have not being watering it enough especially as it has been so dry recently. Also have you fed it? if growing in compost they do need regular feeding (it can be the same regime as roses in the ground) as normal potting compost has only enough feed in it for about 6 weeks. Yes you can use Rose Clear but also a foliar feed may well help like Maxicrop which is seaweed based or SB Plant Invigorator. Hopefully the frosts have finished now but be very careful not to spray if there is a frost forecast as it can cause bad leaf scorch. Don't use high Nitrogen fertilisers as they will encourage soft growth and make the rose more susceptible I never like to remove leaves as a way of controlling disease as it reduces the amount of photosynthesis the plan can do and so weakens it. You need to boost the plant as much as possible to help it to fight off the disease Michael
AR
3 years ago
Michael, Thank you for your responding to my question. Yes, the Rose is planted in a wooden container. Despite being watered as much as other Roses in the garden it just seems to be Eglantyne suffering with the mildew. I do regularly feed my Roses so perhaps it is more to do with the dryness at the roots. I have purchased some Maxicrop so will see if there is any improvement using this and post an update soon. Many thanks again for your reply! Anna
MM
3 years ago
Are your other roses in pots as well? Roses In pots always need a lot more water especially as the compost often drains much more freely than soil. Remember the powdery mildew symptoms won't disappear even though it might be dead but at least extra watering and feeding and treatment will prevent new outbreaks developing Michael

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