10 messages
31/01/2014 at 12:14

My potted eucalyptus (about 4 years old, normally very healthy and grows at quite a rate on its south east-facing patio) has something wrong with it.

At first (before I had put specs on and had a closer look!) I thought it might just be a bit of winter damage, but on closer inspection I can see that the bottom third of the leaves are studded with raised, rust-coloured patches.

What on earth are these?

I thought eucalyptus was infallible!

The potted olive, right next to it, is unaffected.

 

Thank you.

http://s4.gardenersworld.com/uploads/images/original/36785.jpg?width=512&height=350&mode=max

 

 

31/01/2014 at 12:21

It does look like rust fungus. Yes it can affect Eucalyptus. Use Westland Plant Rescue Fungus Control and I would remove all the affected foliage. 

31/01/2014 at 12:25

Thanks blairs

Yes, I feared it might be that - isn't it a big problem in Oz, at the moment? I read somewhere that it had been carried over by a wasp!

Hopefully I can find that fungicide fast and the tree can be saved.

31/01/2014 at 12:44

Jess I cut mine back to a few inches every year.....??ou could do it higher than that.....to,produce fast growing juvenile foliage.  Pollarding is a good way to grow eucalyptus.  By cutting it like this all infected material is removed....hopefully.  

Eucalyptus is not "infallible"....it does suffer from leaf issues and die back.  

After pruning I apply a granular feed.  

31/01/2014 at 12:49

Thanks, Verdun 

I shall do just that.

It had already been heavily pollarded the year before, so i was keen to let it grow back a bit, but what with this rust, I'll give it a good haircut now. Seems a shame, as the upper 2 thirds of leaves are unaffected and glorious and it had reached 7 feet! 

31/01/2014 at 12:50

PS: is it a good time to cut it back now, do you think?

31/01/2014 at 14:00

I would leave it till March, we may still get a harsh winter.

31/01/2014 at 14:07

I'd agree with doc Jess. We've been lulled into a false sense of security with the winter so far, and they can succumb to cold even without pruning, depending on where you are.  

It'll put on lots of growth in the spring/summer anyway, so it would only be small for a little while 

31/01/2014 at 14:41

Yes agree...wise to delay for a few weeks.

I would also apply a thick mulch after pruning too.....after clearing up fallen leaves and foliage.  Help minimise any possible fungal spores.  

31/01/2014 at 17:52
Thanks all- great advice
email image
10 messages