Needle Blight causes yellow spots on the needles. The infected needles turn brown and hang on the tree. The spur bearing the needles may be killed. Gather up and destroy fallen needles to kill overwintering disease. Several rust diseases infect larch.
Alternate hosts are willow, poplar, and birch.
In landscapes, larch and an alternate host may be close. Infected needles near the branch tips turn yellow. Disease identification identifies the alternate host for possible removal. This information is for educational purposes only. References to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.