Malva Disease Query

Watch Reply
More
Mark unread Print Skip to new
thesockett Jul 24, 2001

Dear Interested One
I have 'malvas' in the garden. Not hollyhocks or mallow (Showy, bright pink with dark stripes and center). Leaves have raised, pin-head-sized rust coloured bumps on reverse, and yellow, through-spots on front. Some areas are going seriously brown - seemingly unrelatedly. Is this some kind of general 'rust' -- perhaps spread by leafhoppers? Do you know ? Virtually all of the tightly-packed, seed grown plants (2nd or 3rd year) are showing signs. Do you know what to do?? -- Is this a 'fatal' problem ?

Many thanks !
from The Sockett on the Island (Zone 4 b)

Post #9132
Quote
RiseAnn Rapid City, SD(Zone 5b) Jul 25, 2001

Hi sockett - my malva is just a baby and no signs of rust just yet. I can't help you there. Sorry :(

Post #99775
Quote
AlisonT Aug 03, 2001

Hi Socket,Yes it sounds like rust fungus that malvas and hollyhocks are a bit prone to. Overcrowding and humidity causes it to spread quicker. The spores are often carried on the wind but insects or rain can transfer it. Avoid watering the foliage, increase air circulation next time. The fungus can overwinter at the base of the plant. If it gets very bad they the leaves will start to dry out and die. If you only grow them as annuals save your seed and start over next time. If not and you want to keep them, then remove all the affected leaves now and destroy them. Spray periodically with fungicide - you may have to check with a garden centre or nursery near you since I'm in Australia and our plant products will be different. Next year when they re-start, start spraying at the beginning of the growing season and treat them frequently and that should hopefully prevent it getting a hold next time.

Post #105037
Quote

Post a Reply to this Thread

Please or sign up to post.
Back to Forum Homepage

More Garden Pests and Diseases Threads

Go to all Garden Pests and Diseases threads
BACK TO TOP