05/04/2023
Deep in the luscious pine forests of East Texas, small bulging orange spindle-shaped growths may be seen on pine trees – evidence of a pesky disease known as fusiform rust. Fusiform rust, is caused by a fungus native to the southern United States and can be devastating to timber producers.
Fusiform rust is interesting in that oak trees, particularly water oaks, are required for the fungus to complete its life cycle and cause infections of pines. During spring, powdery, orange-colored, spores are carried by the wind from infected pine trees to newly formed oak leaves.
Fungal infections on the oak leaves produce basidiospores. Doing little to no harm to the oak leaf, these basidiospores are then carried back to pine trees from late April through June.
Luckily, fusiform rust has declined during the past 35 years due to advances in trees genetics that allow tree growers to produce rust resistant pine trees. Learn more about fusiform rust at https://bit.ly/3Vumt9Q