AusBonsai

stocaz wrote:

Damian79 wrote:Hi guys
the only copper sulphate I could find is the Yates bluestone powered stuff?
The directions say not to apply directly to foliage?
Have you heard of this type before?
Cheers

I used the yates liquid copper

Ok thanks!

I've been overseas for the last 3 weeks. I didn't really know what to do with my pre bonsai so I took the plunge and left them with a sprinkler that watered them every second morning. I figured they would be fine to go for 48 hours without water because they were in bigger pots. I didn't factor in that it was going to rain here in Sydney THE WHOLE TIME I WAS AWAY. I'm pretty sure the sprinkler would have filled in any gaps in the rain too. So basically they have all been wet for about 20 days!

Most of them seem fine for now except one of my Juniper Squamatas is showing similar (if not the same) symptoms as the tree that started this thread.

I'm kind of lucky because the main branch that is affected I was tossing up Jining anyway so the tree has made the decision for me.....

So with all of that said its very likely the tree has some fort of fungal infection and the tree is doing its best to survive by sacrificing branches it thinks it doesn't need. Correct?

Looking at this and the previous threads liquid copper seems to be the best remedy and the tree should be sprayed every few days on the foliage and soil. Is this correct?

I know its probably hard to answer this but is the whole tree infected and its just choosing branches based on sun intake? OR Is it just some of the roots and because of the linear vascular system of junipers the corresponding branches are dying? Asking this out of curiosity because this sort of stuff fascinates me!

Also, should I start jining what I think are the dead branches now or wait until I've treated it with the copper for a while which will also make the dead branches stand out even more???

Thanks in advance!

Happy to be corrected - but I would probably avoid getting the soil. If it's the canker that effects junipers/cypress trees(search google for seiridium canker) then it enters the tree through a wound or weakness and disturbs the sap flow causing the affected branch to die off. Nothing to do with the tree deciding to sacrifice a branch - that branch is infected. Once infected there doesn't appear to be any 'cure' to save the infected area. Spraying with copper I think helps stop further spread of infection.

JaseH wrote:Happy to be corrected - but I would probably avoid getting the soil. If it's the canker that effects junipers/cypress trees(search google for seiridium canker) then it enters the tree through a wound or weakness and disturbs the sap flow causing the affected branch to die off. Nothing to do with the tree deciding to sacrifice a branch - that branch is infected. Once infected there doesn't appear to be any 'cure' to save the infected area. Spraying with copper I think helps stop further spread of infection.

Spot on from what I know, the spray is merely a preventative - not a cure. Can't save a branch once it's on its way but you can sure as hell stop it from spreading.

I do know that there is a particular fungal disease that only seems to affect Pingii Junipers. As such I've avoided them like anything - even though the foliage is very nice.

I've stuck to my Shimpaku (my favorites) and Procumbens (going to be grafted with Simpaku eventually...) junipers and never had such an issue.

Cheers,
Mo

MoGanic wrote:

JaseH wrote:Happy to be corrected - but I would probably avoid getting the soil. If it's the canker that effects junipers/cypress trees(search google for seiridium canker) then it enters the tree through a wound or weakness and disturbs the sap flow causing the affected branch to die off. Nothing to do with the tree deciding to sacrifice a branch - that branch is infected. Once infected there doesn't appear to be any 'cure' to save the infected area. Spraying with copper I think helps stop further spread of infection.

Spot on from what I know, the spray is merely a preventative - not a cure. Can't save a branch once it's on its way but you can sure as hell stop it from spreading.

I do know that there is a particular fungal disease that only seems to affect Pingii Junipers. As such I've avoided them like anything - even though the foliage is very nice.

I've stuck to my Shimpaku (my favorites) and Procumbens (going to be grafted with Simpaku eventually...) junipers and never had such an issue.

Cheers,
Mo

Ok thanks guys. You learn somthing new every day....