Biology Reference
In-Depth Information
Rhizosphaera kalkhoffii
Needle Cast
of blue
spruce. Lowest needles are affected first, becom-
ing mottled yellow, and the disease progresses up
the tree. It has been controlled in ornamentals
with three sprays of bordeaux mixture.
Rhizosphaera
Deuteromycetes, Sphaeropsidales,
Sphaerioidaceae
Pycnidia brown, on a stalk; spores ovoid, one-
celled, hyaline.
