Biology Reference
In-Depth Information
retaining viability for only a week at 80
F. In
southern California temperatures are uniformly
favorable for rose rust, and from October to
April there is sufficient rainfall. In drier months
fog may provide requisite moisture.
Control
Removing infected leaves during the
season and all old leaves left at the time of winter
or early spring pruning may be somewhat helpful.
Phragmidium rosae-arkansanae 0, I, II, III on
Rosa arkansana
and
R. suffulta
. Teliospores with
five to eight cells.
Phragmidium rosae-californicae 0, I, II, III on
many rose species. Teliospores with eight
Phragmopyxis acuminata 0, III on
Coursetia
.
Physopella (Angiopsora)
Pucciniaceae. Only uredia and telia known. Telia
indehiscent, lenticular; teliospores in chains.
Physopella ampelopsidis (
Phakopsora vitis
).
On ampelopsis and grape, Florida.
Physopella compressa On paspalum, southern
ornamental grass.
to
Pileolaria
eleven cells.
Phragmidium rosicola III on
Rosa engelmanii
and
R. suffulta
. Teliospores one-celled, nearly
round.
Phragmidium rubi-idaei
Leaf and Cane Rust
of raspberry;
Western Yellow Rust
, general but
important only in the Pacific Northwest. 0, I, II,
III on red rasberries, sometimes black but not on
blackberries. Small, light yellow spore pustules
appear in young leaves, with black teliospores
following in the same spots later in the season.
Deep, cankerous lesions are formed on canes in
the fruiting year, Cuthbert variety being particu-
larly susceptible. Spring infection probably
comes from sporidia formed in telia on fallen
leaves. A dormant spray may be helpful, along
with cleaning out
Pucciniaceae. Autoecious, on members of family
Anacardiaceae. Teliospores stipitate, dark, with
pores, one-celled; pycnia subcuticular; uredia
present.
Pileolaria cotini-coggyriae On smoke tree.
Pileolaria patzcuarensis 0, I, II, III on sumac.
Prospodium
Pucciniaceae. Autoecious on Bignoniaceae and
Verbenaceae in warm climates.
Prospodium appendiculatum On
tecoma,
Florida, Texas.
Prospodium lippiae On lippiae, Arizona.
Prospodium plagiopus On tabebuia, Florida.
Prospodium
infected canes at winter
pruning.
Phragmidium speciosum 0, I on stems and
leaves, III on stems of cultivated and native
roses, throughout United States except far South.
Phragmidium subcorticium Obsolete name.
Some specimens formerly recorded as this spe-
cies belong to
P. mucronatum
, others to
P.
rosaepimpinellifoliae
.
Phragmidium tuberculatum On
Rosa
sp. Con-
necticut and Alaska.
transformans On
tecoma,
Florida.
Puccinia
Pucciniaceae. A very large genus, comprising
nearly half of all known rusts; autoecious and
heteroecious. Teliospores smooth, two-celled
with apical pores, firm pedicels, colored; aecia
cluster cups with peridium (see
Fig. 3
). The spe-
cies listed here are a small selection of those on
garden plants; others are listed in host section.
Puccinia acroptili
Rust
on
Centaurea
.
Puccinia allii (
P. porri
). Autoecious on onion,
garlic and shallot, but 0, I stages rare. Occasional
on cultivated onion, more common on garlic,
Phragmopyxis
Pucciniaceae. Teliospores colored, two-to many-
septate; wall three-layered, the middle layer
swelling in water; aecia, uredia, and telia with
a border of paraphyses.
