Spruce Needle Rust is the common name for several fungi in the Chrysomyxa family, which affect Spruce trees in Calgary. This rust is easily identified by extensive needle drop and the pale yellow bands developing on the new needles in early summer. Identification of the different varieties in Spruce Needle Rust occurs mainly by looking at the differences in shape of the spores.
The disease infests trees at bud break through release of spores, which are carried by wind and splashing raindrops. Previously infected needles will turn brown, die and drop during the summer.
Which of my trees should be inspected for Spruce Needle Rust?
Spruce Needle Rust can affect all varieties of Spruce trees, although some are more susceptible than others. Common trees to get Spruce Needle Rust disease are:
Common symptoms linked to Spruce Needle Rust are
Following pictures can help you determine if your tree is infected with Spruce Needle Rust:
Overall look. Minnesota Department of Natural Resources, Bugwood.org
Can Spruce Needle Rust be treated?
There are several measures that can be taken to control the affects of Spruce Needle Rust.