More questions on Eastern Red Cedar and rust

[Bonsai_hope]

Nearly 4 years ago I purchased two Eastern Red Cedars at the Savannah Botanical Garden plant sale. They were collected by someone who said they were 3 and 5 years old (although how he knew this I don’t know). I planted them both in a “nursery” section of my garden where I “dump” things I think I might like to work on in the future. I recently dug the older of these two up. I’m estimating it’s about 8 years old. I came here to get ideas and was inundated with admonitions about Cedar/Apple Rust. It’s not going to stop my experimenting because I think I can manage it if it arrives. Here are my two questions:

1) is Cedar/Apple rust a risk to my other Juniperus? I currently have a number of procumbens, shimpaku, and itoigawa.
2) These trees have been planted in the garden for 3 years without any signs of rust. Should I expect it just because they are in pots?

Here’s a picture of the older one I’m starting to work on.

 

[rockm]

Short answer is yes it can be a threat to junipers where galls can form. More dangerous to apples and apple family —pears plums crabapple cherries quince though. Wait for the orange slime. It’s great.

Cedar rust has to have a member of the Apple family (apple pear quince cherry) nearby to form. It may not happen for years until the wind blow in just the right direction after a period of wet weather

 

[Bonsai_hope]

Short answer is yes it can be a threat to junipers where galls can form. More dangerous to apples and apple family —pears plums crabapple cherries quince though. Wait for the orange slime. It’s great.

Cedar rust has to have a member of the Apple family (apple pear quince cherry) nearby to form. It may not happen for years until the wind blow in just the right direction after a period of wet weather

So i should keep my junipers away from my Japanese quince and flowering quince?

 

[rockm]

So i should keep my junipers away from my Japanese quince and flowering quince?

I’d get rid of the ERC if you have quince. ERC IS Not worth the trouble on one hand and in the other hand it’s a Possible sump for disease for more valuable workable trees.

 

[yenling83]

I’d get rid of the ERC if you have quince. ERC IS Not worth the trouble on one hand and in the other hand it’s a Possible sump for disease for more valuable workable trees.

Agree. I'd add that Bjorn has some great resources on this disease and others on his Bonsai U platform, I'd highly recommend Bonsai U!

 

[KWag]

I won’t judge your Eastern Red Cedar. I have 8 apple trees and quince as shrubbery in a state where ERC are considered invasive. With the appropriate sprays apple/cedar rust can be treated.
Georgia has a department of agriculture that should have an extensive literature library.

 

[Wires_Guy_wires]

Rust doesn't transfer from juniper to juniper.

So if one juniper gets it, the others are exposed to the same winds with spores as the one that got it.

Since apples and pears are cash crops, farmers tend to hate junipers. But most junipers are susceptible to it; all european species and all US species, some japanese cultivars are less susceptible.
Once infected, it can only be truly "cured" by cutting it out.
Spraying can prevent apples and pears from getting it, but not junipers. Hence why invasive junipers are a problem and why junipers are cut down for miles surrounding orchards if the farmers get that chance.