Podophyllum 2014

[johnw]

You can already see start of rust spotting on these.  One of the banes of my existence, very resistant to fungicides.
George[/quote]

George  - What are the symptoms of rust on these?

johnw

[Geoforce]

John

There is a rust specific to podophyllum which is commonly called 'Mayapple Rust'.  Starts as small yellow spots visible on surface of leaf and reddish 'rust' areas under them.  Spots multiply and grow until entire leaf is involved, and the leaf curls and dies.

Luckily, the asiatics seem more resistant to it.

Here is a link about it:http://www.fungimag.com/spring-2013-articles/LRV6I1Mayapple.pdf