[MAIPC] biological control of ground ivy/ gill over the ground 2019

[Marc Imlay]

So what is the impact of this rust on native plants?

 

Marc

 

 

. Biological control- A new rust fungus, Puccinia glechomatis, that attacks
ground ivy has potential as a biocontrol for this invasive species. The
fungus forms small tan dots on the undersides of the leaves and stems. A
severe infection can cause death of a whole leaf segment or an entire stolon
and all its leaves.

 <https://www.invasive.org/weedcd/pdfs/wow/ground-ivy.pdf>
https://www.invasive.org/weedcd/pdfs/wow/ground-ivy.pdf

 

The objective of this study was to find features in microcyclic rust fungi
(Uredinales) on wild host plants favorable for extension of the natural
range of distribution. Puccinia glechomatis, a leptosporic rust fungus and
its herbal host Glechoma hederacea (Lamiaceae), both natives to Eurasia and
introduced in North America, were used for this study. Although the host has
been known from North America since the beginning of the nineteenth century,
the rust fungus was first observed there only in recent years. Favorable
features were identified by studying the life cycle of the rust, including
nuclear conditions and seasonal characteristics as well as its spread in
North America. The life cycle was studied macroscopically by inoculation
experiments, by various light microscope techniques, and by scanning
electron microscopy. The spread of the pathogen and its host were
reconstructed by evaluating host plant herbarium specimens and databases,
literature, and field study data. The studies on P. glechomatis show that,
generally for microcyclic rust fungi, establishment and potential for spread
are based on several favorable features of both the host (e.g., synanthropic
occurence and dispersal, genetic stability, regeneration of vegetative plant
parts) and the rust fungus (asexual reproduction/genetic stability,
homothallism, propagation with host plant, formation of both leptospores and
thick-walled teliospores).

 
<https://www.researchgate.net/publication/225333251_Life_cycle_and_life_stra
tegy_features_of_Puccinia_glechomatis_Uredinales_favorable_for_extending_the
_natural_range_of_distribution>
https://www.researchgate.net/publication/225333251_Life_cycle_and_life_strat
egy_features_of_Puccinia_glechomatis_Uredinales_favorable_for_extending_the_
natural_range_of_distribution

 

There have been no  <https://en.wikipedia.org/wiki/Biological_control>
biological control agents introduced by agencies such as the
<https://en.wikipedia.org/wiki/USDA> USDA in North America to help to reduce
its spread. It even appears that no research has been done on the subject of
biological control agents for this plant.
<https://en.wikipedia.org/wiki/Glechoma_hederacea#cite_note-waggy-2> [2]
Biological control, however, is the most ecologically effective type of
control for plants such as this that invade
<https://en.wikipedia.org/wiki/Woodland> woodland ecosystems, as it does not
cause destruction of valued species, or pollution, as chemical control
attempts do.

 <https://en.wikipedia.org/wiki/Glechoma_hederacea>
https://en.wikipedia.org/wiki/Glechoma_hederacea



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