Host to Puccinia chondrillina:
The host of this
fungus (rush skeletonweed) was first identified in the 1870's in the
northeastern part of the United States. Primarily New York,
Maryland, and West Virginia. In the northwestern part
of the United States it was first identified in 1938 in Spokane County,
Washington. This fungus has now spread world wide to Argentina,
Lebanon, New Zealand, Portugal, Spain, and of course, the United
Effects of Rush Skeletonweed
infects the upper and lower parts of the leaves on
host plants usually in the spring or fall. If the plant is
young when this fungus is spread
to it, it may die of over-infection. Puccinia
can slow down the growing
of a plant and even reduce the size of the plant. It can also
plant's reproduction system. (1) Note:
Some varieties of Rush Skeletonweed are
resistant to the fungus. (2)
Life Cycle of Rush Skeletonweed
The postulates are dark brown and
stay dormant durring the winter months. When the spring comes,
the fungus starts to reproduce. Spores are created in
fruiting bodies that form on the plant's leaves. These fruiting
bodies produce airborne spores that are spread to other host plants by
rain. You may
not see the fungus start forming on the plant until 12 to16 days after
inoculation. Also see: Life Cycle of Rush Skeletonweed
Availablitly of Rush Skeletonweed Rust:
When you want to try to control the spread of rush skeletonweed you can
get a combination of controls. Usually it will come in a 3 way
schmidti (insect) and Eriophyes chondrillae
(insect) along with Puccinia
chondrillina (fungi). Cystiphora
schmidt can attack the plant's leaves and stems in its larval
It will then produce galls after feeding a while on the leaves and
stems. What it basically does is reduce the plant's size and it's
surface area available for
photosynthesis. Eriophyes chondrillae is
a mite that eventually disturbs the seed production of rush
skeletonweed and the growth. The mite attacks the buds of
the plant and thus will reduce the amount of the carbohydrates in
reserve in the plant's roots which will reduce the amount of vigor the
plant has. (3)
How to Collect, Transfer, and
Redstribute: To find information on how to collect,
transfer and redistribute, see Purchase Biological Control Agents.
Also, in the state of Montana, see your Montana Weed Distribution.
Your local weed distribution should be able to give you all the
information that you need to collect Rush Skeletonweed, how to transfer
it carefully, redistribute it and take care of it. (7
(1) Rush Skeletonweed.
Rush SkeletonWeed. 12 July 2004. Grandview
Heights. 21 Jan 2005 <http://www.cdeaton.com/GrandviewHeights/NoxiousWeeds/rush_skeleton_weed.htm
(2) Rush Skeletonweed Pucinnia
1997. Ministry of Forests.
28 Jan 2005
(3) Rush Skeletonweed Bioagents.
Bioagents. 2003. Ferry County Cooperative Extension.
21 Jan 2005 <http://ferry.wsu.edu/Agriculture/skeletonweed.htm>
(4) Integrate Weed
Control. 2000-2003. Integrated Weed Control. 3 Feb
(5) Biological Control Agents. Biological Control
Angents. 1997. Ministry of Forests. 5 Feb 2005 <http://www.for.gov.bc.ca/hfp/pubs/interest/bioagent/bioagent.htm
(6) Rush Skeletonweed Rust
. Puccinia chondrillina
Sydenham- "Rush Skeletonweed Rust". March 2005.
Enviromental Laboratory. 17 March 2005 <http://el.erdc.usace.army.mil/pmis/biocontrol/html/puccinia.html
(7) Biological Control Agents.
Purchase Biological Control Angents. 23 Jan 2005. Montana
Weed Distribution. 10 Feb 2005 <http://mtwow.org/Montana-Counties-2.htm
, March 17, 2005.
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