Larch / Tamarack > Witches’ broom/Rounded clump of small twigs
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Eastern dwarf mistletoe
- Witches’ brooms, a clump of small weak branches arising from one point on a larger branch, form in infected trees
- Needles within the witches’ broom remain green, needles on the rest of the tree yellow and fall off, typically from the top of the tree down
- Short (1/2 to 1 inch) brown to orange dwarf mistletoe stalks can be seen during the growing season but fall off after seed dispersal in August or September; this occurs only after 4 to 5 years of infection
- Common only on tamarack near infected black spruce in northern Minnesota
- More information on Eastern dwarf mistletoe...