DULUTH, Minn.—On a frigid January morning, Rich Larson scales a big tamarack tree, breaking off branches as he climbs towards his target. About 30 feet high, as the wind swirls around him, Larson, 59, ...

Witches' broom formations are seen in this Virginia pine. The effect of witches' broom is caused by stress in trees. (Submitted photo/Curtis Young) On my cranky days some might say it’s my mode of ...

The term “witch’s broom” probably conjures up images of Harry Potter playing quidditch or the Wicked Witch of the West berating Dorothy in “The Wizard of Oz.” But in the plant world, it’s something ...

We often see witches’ brooms in winter when looking into the tree canopy of an otherwise barren landscape. There is an abnormal cluster of growth, with shortened stems and needles, maybe in the shape ...

Like me, many people have probably seen them. Up close, or at a distance, they stick out like a sore thumb. What amazes me most about them is I've really never bothered to look them up to see exactly ...

Rose Rosette Disease is a problem affecting roses across the country, and it is here at Minnetrista. This virus, also called witches’-broom, infects rose plants and is spread by the eriophyid mite.

All 30 plants in my hedges are infected with something.The soil does not drain well in some locations, better in others. I am just beginning bi-weekly applications of diluted insecticide. Can the ...

Q:I have a young oak in my backyard in the Montclair district of north Oakland and it is covered with shriveled leaves at the branch ends. The shriveled leaves have a grayish-white powder on them.

Transcriptional profiling of lateral main bud development infected by JWB phytoplasmas. Chinese jujube (Ziziphus jujuba Mill.), an important species in the Rhamnaceae family, has been cultivated in ...