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Rust

Symptoms

Yellow patches on leaves with orange-brown pustules on the under-surface. Plants may lose their leaves as a result of heavy infestation and rust pustules may be seen on stems.
Find it on: roses, fruit trees, ornamental trees, shrubs, perennials, vegetables
Time to act: spring, summer, autumn

Overview

Rust is a fungal infection and there are many different types that tend to be specific to particular plants and spreads by means of dust-like spores. The fungus is encouraged by a humid, moist atmosphere and grows on the surface of the leaves and sometimes stems. It takes its nutrition from the plant. This can weaken the plant and in severe cases reduce its flowering or productivity. Bad infestations may result in total loss of leaves and occasionally in death of the plant.
Solution
Yellow patches on leaves with orange-brown pustules on the under-surface. Plants may lose their leaves as a result of heavy infestation and rust pustules may be seen on stems.
Organic
Check plants regularly and remove infected leaves by hand. Tidy up any infected fallen leaves to prevent re-infection. This is particularly important in autumn when the spores can overwinter on fallen leaves to contaminate seedlings or new growth in spring. Prune out infected growth and maintain an open centre to shrubs to allow good air circulation through the plant.
Chemical
Spray the plant and the soil around it with a fungicide suitable for the control of rust fungus.



Discuss this problem

Talkback: Rust
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kaycurtis 24/11/2011 at 15:27

goodness me another fungie day, you try your best and it still get's you. thanks for reminding me, to get my finger out and start protecting my lovely plants.

Garden Maniac 07/10/2012 at 20:07

I've got rust on roses, hollyhocks and apple - all in the same border! The advice makes very good sense - I've got a fungicide but was nervous to use it - I'm an organic gardener at heart, but sometimes you have to admit defeat...!

margaret roberts 20/07/2014 at 20:01

I have a tree that has developed rust spots and orange powder on the underside of the leaves over the last few weeks. the powder has fallen on to shrubs and flowers under and close to the tree. will this harm the other plants and what can I do to solve the problem?

Yviestevie 20/07/2014 at 20:05

I grow hollyhocks behind roses.  The hollyhocks always get rust but so far it hasnt transferred to other plants.  Didnt I read somewhere on here that the rust that hollyhocks get is different from the rose variety or am I having another senior moment.

Edd 20/07/2014 at 20:14

Rust happens

Some times you are unluckey.

Better luck next year with it.

BUT ONLY IF YOU DO KNOW TO STOP IT. PLEASE. ( Stop the spread and not the thread! please.)