Leaf spot

Discuss Leaf spot with other Shoot members
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Both these plants grew beautiful flowers but now seem to have some disease both on leaves and stem.
Their location was changed to another part of the house, when they were brought to original location ,which has more sunlight and where they bloomed many a time, this happened.
Is there a way to treat them
Posted: Tuesday 19th of January 2016 01:44 AM Last reply: Saturday 1st of March 2025 08:56 AM
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I have a number of hedges of Viburnum tinus. They have all been affected by a ghastly leaf spotting disease. Small holes appear on new leaf growth and then the whole hedge gradually becomes affected and turns brown. Have hunted the garden forums for an answer - but can't find anything specific. Would dearly like to treat this disease as I don't want to replace the Viburnum hedges. Have attached two pictures to show the damage.
Thanks to anyone who can help & advise !
Posted: Tuesday 4th of August 2015 09:06 AM Last reply: Friday 7th of March 2025 06:42 AM
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Hi!
Leaf spot on Photinias is caused by the fungus called Entomosporium. The fungus overwinters on infected leaves/branches from the previous year. Wet weather in spring disperses spores, which then infect new growth. Leaves can be infected during wet weather, and again in autumn during wet weather. There are a number of things to do to combat leaf spot. Make sure your Photinia is in sun with good air circulation. Remove and destroy infected leaves, including fallen leaves. If twigs/branches are infected, prune them off. If you irrigate, avoid overhead watering. Finally, apply a copper-based fungicide 3-4 times in spring when buds are breaking. Continue regular treatment throughout spring until drier weather resumes.
Hope this is helpful.
Kathy C
Posted: Tuesday 8th of January 2013 06:02 PM
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Our two standard photinias and our "little red robin" are affected by leaf spot, exactly as illustrated in the example shown on the site. I would appreciate advice on how to deal with this.
Posted: Tuesday 8th of January 2013 02:46 PM Last reply: Sunday 16th of March 2025 05:21 PM
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Hi there I think with reference to the red Robin don't worry too much about the black spot as in the south east it's very common and they are susceptible to this. The bay try a general herbicide and parasite spray and feed well in spring with a general feed.
Hope this helps. Matt
Posted: Friday 7th of January 2011 02:59 PM
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hi
my four standard bays have developed leaf spot which i have only just noticed since the snow melted. Could the cold have caused the problem? i have also noticed some on my red robin.
and lastly can i treat it and how. i am not against using chemicals!
thanks in advance
katy
Posted: Friday 7th of January 2011 12:22 PM Last reply: Saturday 1st of March 2025 08:54 AM
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