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#1
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Some sort of disease maybe? - Hollyhocks
Hiya folks,
Hope you are all enjoying the glorious weather! Have been lurking for the last few weeks as have had no questions and have been unable to answer anyone elses. Well all that is about to change I'm afraid. I have some hollyhocks in the garden, only about six of them. I have noticed that the leaves have some sort of disease, there are masses of bumps on the underside of the leaves and I mean absolutely loads. The leaves are literally covered with what looks like loads of eggs, although I don't think they are eggs, they are also an orange colour. The plants don't seem to be getting very tall but they do have buds on which look fairly healthy. Does anyone have any ideas or know what this is? Thank you in advance. Happy gardening :-) Gail |
#2
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Some sort of disease maybe? - Hollyhocks
"tom&barbara" wrote in message ups.com... Hiya folks, Hope you are all enjoying the glorious weather! Have been lurking for the last few weeks as have had no questions and have been unable to answer anyone elses. Well all that is about to change I'm afraid. I have some hollyhocks in the garden, only about six of them. I have noticed that the leaves have some sort of disease, there are masses of bumps on the underside of the leaves and I mean absolutely loads. The leaves are literally covered with what looks like loads of eggs, although I don't think they are eggs, they are also an orange colour. The plants don't seem to be getting very tall but they do have buds on which look fairly healthy. Does anyone have any ideas or know what this is? Thank you in advance. Happy gardening :-) Gail It sounds like rust which is one reason I avoid growing them. I believe there are some resistant varieties. Do a Google for Hollyhock rust or have a look at this:- http://plantclinic.cornell.edu/FactS...lyhockrust.htm Have a look at this |
#3
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Some sort of disease maybe? - Hollyhocks
tom&barbara writes
Hiya folks, Hope you are all enjoying the glorious weather! Have been lurking for the last few weeks as have had no questions and have been unable to answer anyone elses. Well all that is about to change I'm afraid. I have some hollyhocks in the garden, only about six of them. I have noticed that the leaves have some sort of disease, there are masses of bumps on the underside of the leaves and I mean absolutely loads. The leaves are literally covered with what looks like loads of eggs, although I don't think they are eggs, they are also an orange colour. The plants don't seem to be getting very tall but they do have buds on which look fairly healthy. Does anyone have any ideas or know what this is? Thank you in advance. Hollyhocks (and others of the mallow family) are prone to rust, which looks like little pustules of orangeness. I don't think there's anything you can do about it. Take off the worst affected leaves and dispose of them. -- Kay |
#4
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Some sort of disease maybe? - Hollyhocks
K wrote: [...] Hollyhocks (and others of the mallow family) are prone to rust, which looks like little pustules of orangeness. I don't think there's anything you can do about it. Take off the worst affected leaves and dispose of them. By burning. This is why people grow hollyhocks as annuals or biennials, even though they're perennial. I'd destroy these plants after flowering, and start again in spring. May as well let them grow on, as they'll probably give you a display unless they're totally wrecked. I'm out of date, but there must still be a fungicide you can spray at intervals to slow down (you won't stop it) the infection for the summer...yes, I see from the Web you can use sprays called Systhane or Dithane 945 -- if you're into sprays: I don't think I would, personally. Bordeaux mixture is acceptable under organic rules, of course. -- Mike. |
#5
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Some sort of disease maybe? - Hollyhocks
In message . com,
tom&barbara writes Hiya folks, Hope you are all enjoying the glorious weather! Have been lurking for the last few weeks as have had no questions and have been unable to answer anyone elses. Well all that is about to change I'm afraid. I have some hollyhocks in the garden, only about six of them. I have noticed that the leaves have some sort of disease, there are masses of bumps on the underside of the leaves and I mean absolutely loads. The leaves are literally covered with what looks like loads of eggs, although I don't think they are eggs, they are also an orange colour. The plants don't seem to be getting very tall but they do have buds on which look fairly healthy. Does anyone have any ideas or know what this is? Thank you in advance. Hollyhock Rust (Puccinia malvacearum), also known as Mallow Rust or Malva Rust. This is a South American fungus which has spread more or less worldwide, and affects a variety of plants in the mallow family - particular Hollyhocks, Common Mallow (and some of its weedy relatives) and Musk Mallow. It's claimed that Antwerp Hollyhocks (Ficifolia Group) are relatively resistant. I suspect that the bloodlines of Alcea rosea are so intertwined that you can't rely on this. It's also claimed that Alcea rugosa is resistant as well. Herbaceous Lavateras (Lavatera thuringiaca and cvs) are pretty much resistant and have a similar habit, but not the range and intensity of colour. -- Stewart Robert Hinsley http://www.malvaceae.info/ |
#6
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Some sort of disease maybe? - Hollyhocks
Many thanks to everyone for your replies. I have decided to leave them to flower and then I will pull them up and burn them. I think I will go for the one which doesn't rust in future. Gail |
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