D'Angelo
Mame
Found this on about a dozen needles this morning, never seen it on any of my trees. What is it and how should I treat it?...Prostrata juniper
Fungus or anything to worry about??
- Thread starter D'Angelo
- Start date
Beng
Omono
What's the brown thing right at the base of the yellow needle? It looks like it could be some kind of scale.
D'Angelo
Mame
Was told it could be this..... http://urbanext.illinois.edu/focus/cedarapplerust.cfm
Dav4
Drop Branch Murphy
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I'm on my smart phone right now, so I can't see them that well, but.....if the junk on the needles is gelatinous and brown to orange in color it's definitely a rust. I had alot of rust on my rocky mountain junipers about a month ago...had to remove alot of foliage and small branches
....which is what you should do.
Dav4
Drop Branch Murphy
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I use a copper based fungicide as a preventative as well. Unfortunately, once the fungus is established on the tree, the copper treatment is useless...removing the infected foliage and branch material (and burning it or tossing in the trash) is the only effective treatment.
Bill S
Masterpiece
october
Masterpiece
Just in case, you should absolutely spray. Either the copper or the daconil. Personally, I did not like the daconil. It leaves a white residue on the foliage for months. Also, I think that some juniper foliage doesn't react well. I am not certain of this, but it seems the growth sort of pales and looks a bit wilted from the daconil.
Still, whether the spraying helps or not, it should be given a shot. Also, it is very important that you completely clean all tools after you work on each individual tree. Use a rag and rubbing alcohol. In fact, in between every cut you could clean your scissors.
Not to make you worry but there have been a lot of fungus problems on junipers around here in the last couple of years. This can be very serious. It is not uncommon for people's collections to be decimated. Even to the point where people lose all their junipers in a short time.
Rob
Still, whether the spraying helps or not, it should be given a shot. Also, it is very important that you completely clean all tools after you work on each individual tree. Use a rag and rubbing alcohol. In fact, in between every cut you could clean your scissors.
Not to make you worry but there have been a lot of fungus problems on junipers around here in the last couple of years. This can be very serious. It is not uncommon for people's collections to be decimated. Even to the point where people lose all their junipers in a short time.
Rob
Beng
Omono
What rate do you all apply copper fungicide to your junipers, i've only used daconil on them up till now. Bonides copper fungicide does not list junipers as a species you can use it on.
Dav4
Drop Branch Murphy
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With the concentrate, I've used the rate suggested for pines, which is 0.5 to 2.0 fluid ounces (15 to 60 ml ) per gallon of water. I split the difference and mix 1 tsp ( 5 ml ) per liter. I think I need a stronger mix, though, as I had a large amount of rust this sprin... and needle cast on my pines is obviously still an issue, too.
.
Beng
Omono
With the concentrate, I've used the rate suggested for pines, which is 0.5 to 2.0 fluid ounces (15 to 60 ml ) per gallon of water. I split the difference and mix 1 tsp ( 5 ml ) per liter. I think I need a stronger mix, though, as I had a large amount of rust this sprin... and needle cast on my pines is obviously still an issue, too
Have you tried infuse or other Propocanizole based fungicides? I wonder if they'd be more effective i've got 90% of my fungal problems under control this year with it. Although I am using copper on the pines and daconil on the juni's.
october
Masterpiece
Dav4
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No, but I'll look into it. Copper has always been my mainstay fungicide because it's safe, supposedly very effecetive against both rusts and needle casts, and it's stable for years...I'm still using the bottle I bought almost a decade ago
....which means I'm probably not applying it frequently enough, too
. Seriously, though, I never haf major fungal issues with my trees until I moved to the hot and humid Southeast.october
Masterpiece
No, but I'll look into it. Copper has always been my mainstay fungicide because it's safe, supposedly very effecetive against both rusts and needle casts, and it's stable for years...I'm still using the bottle I bought almost a decade ago
Wow.. Almost a decade ago... Usually with both fertilizers and pesticides, if they are not used within 3 years, I but new batches.
Rob
fore
Omono
Well, again I too am battling fungus on one shimp, one RMJ, and a JBP. I'm using copper (1tbs/gal too) every other week switching to daconil. I hadn't heard that daconil isn't liked that well on junipers, I'll keep an eye on them. But I lost a few crucial branches already on the JBP. So for me, I'm having the same problems again this yr. with tip blight. Though I seem to have more of a handle on it than I did last yr. where it did indeed decimate my collection loosing 3-4 trees.
Continuously having to deal with diseases has unfort. affected my enthusiasm for bonsai. Not so I want to quit, but it definitely makes enjoying this hobby hard when you loose trees/branches etc. Not the best for gaining confidence in my horticultural skills lol
Continuously having to deal with diseases has unfort. affected my enthusiasm for bonsai. Not so I want to quit, but it definitely makes enjoying this hobby hard when you loose trees/branches etc. Not the best for gaining confidence in my horticultural skills lol
october
Masterpiece
Hi fore.. Yup, I believe that you and I have had discussions about this over the last year. Last year was one of my worst bonsai seasons in 10 years. As I watched this seemingly unstoppable fungus decimate my trees. I had contemplated my future in bonsai. However, I decided that I was going to get even more involved in the art and not give up.
As far as the daconil, it was probably me that said that the daconil seemed to adversely affect the juniper foliage. However, I cannot say for sure. It could have been the fungus, weakening those sections. I believe they make a daconil from concentrate. The one that I used was premade in the spray bottle. I believe the owner of the nursery said he uses the one you mix yourself and had not experienced any problems. Also, It didn't seem like the daconil was doing much, so I switched to the copper. Whatever the case, I was able to halt the fungus at the end of the season last year.
One very important thing for everyone experiencing these fungal issues. Make sure you clean all your tools between working on each tree. A rag and alcohol is simple enough and can really make a difference. Also, you can also wipe the scissors in between each cut on a tree that you are cutting the fungus ridden parts off of. Also, isolate sick trees and do not let water wash and splash from diseased trees onto other trees. Another thing that I do is cut back some on showering off the foliage on the junipers. On healthy trees, I do it every time I water, when they have the fungus, I do it maybe half the time. With the case of pines, it is recommend to not shower off the tree that often in general. We had an expert bonsai pine artist visit the nursery years ago and I believe he said he hardly ever showers off his pines when he waters. I believe his specialty was white pines.
Rob
As far as the daconil, it was probably me that said that the daconil seemed to adversely affect the juniper foliage. However, I cannot say for sure. It could have been the fungus, weakening those sections. I believe they make a daconil from concentrate. The one that I used was premade in the spray bottle. I believe the owner of the nursery said he uses the one you mix yourself and had not experienced any problems. Also, It didn't seem like the daconil was doing much, so I switched to the copper. Whatever the case, I was able to halt the fungus at the end of the season last year.
One very important thing for everyone experiencing these fungal issues. Make sure you clean all your tools between working on each tree. A rag and alcohol is simple enough and can really make a difference. Also, you can also wipe the scissors in between each cut on a tree that you are cutting the fungus ridden parts off of. Also, isolate sick trees and do not let water wash and splash from diseased trees onto other trees. Another thing that I do is cut back some on showering off the foliage on the junipers. On healthy trees, I do it every time I water, when they have the fungus, I do it maybe half the time. With the case of pines, it is recommend to not shower off the tree that often in general. We had an expert bonsai pine artist visit the nursery years ago and I believe he said he hardly ever showers off his pines when he waters. I believe his specialty was white pines.
Rob
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Dav4
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Yeah, I know...but I've been told someone in the bonsai biz for 30 years that it's chemically stable with a very long shelf life...and I'd rather use it then toss it in a landfill.
fore
Omono
Yes Rob, I remember our conversation. I also use the concentrate that I mix up myself, so maybe that's why I haven't seen any problems on my junis??
Interesting, and encouraging to hear this horrendous experience has emboldened you to get deeper into the hobby. Maybe my 'glass half empty' attitude in life is not the best attitude to have right now lol I obviously need an 'attitude adjustment'
) Seriously Rob, I appreciate you sharing your outlook here, it does help me.
Interesting, and encouraging to hear this horrendous experience has emboldened you to get deeper into the hobby. Maybe my 'glass half empty' attitude in life is not the best attitude to have right now lol I obviously need an 'attitude adjustment'
) Seriously Rob, I appreciate you sharing your outlook here, it does help me.october
Masterpiece
Yes Rob, I remember our conversation. I also use the concentrate that I mix up myself, so maybe that's why I haven't seen any problems on my junis??
Interesting, and encouraging to hear this horrendous experience has emboldened you to get deeper into the hobby. Maybe my 'glass half empty' attitude in life is not the best attitude to have right now lol I obviously need an 'attitude adjustment'
Can you tell me the results you had with the concentrate daconil? Did it seem to stop or slow down the fungus?
Rob
october
Masterpiece
p.s. Well, just came in from spraying. It looks like it might be starting again on a juniper that had it last year juniper. Too early to tell, but I sprayed it anyway. 
Rob
Rob
