Re: RUST? - OAK
Shoot User
Hi Carolyn,
If there are any raised bumps where the rust is then it might be Oak Leaf Blister. If no raised bumps then its just a spot rust. Either way its fungal. As the sapling is young I would advocate treating it with a proprietary fungicide to get rid of the infection once and for all. Rake up and burn any leaves - don't compost them.
kind regards,
Ash
@AshleyDPenn
Replied: Thursday 21st of March 2013 11:25 PM