Puccinia spegazzinii
| Puccinia spegazzinii | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name | ||||||||||||
| Puccinia spegazzinii | ||||||||||||
| De Toni |
Puccinia spegazzinii is a stand fungal art from the order of the rust fungi (Pucciniales). The fungus is a endoparasite the Korbblütlergattung Mikania . Symptoms of the infestation by the species are rust spots and pustules on the leaf surfaces of the host plants. It is common in much of America .
features
Macroscopic features
Puccinia spegazzinii can only be recognized with the naked eye by means of the spore beds protruding on the surface of the host. They grow in nests that appear as yellowish to brown spots and pustules on the leaf surfaces.
Microscopic features
The mycelium of Puccinia spegazzinii grows as with all Puccinia intercellular types, and forms Saugfäden that grow into the storage tissue of the host. Their spermogonia and aecia are unknown, the same applies to the uredia of the fungus and their uredospores. The leaves of the species growing on the underside of the host leaves are light cinnamon brown, compact and uncovered, they are in dense groups. The almost hyaline to yellowish teliospores are two-celled, usually cylindrical to narrow ellipsoidal and 40–60 × 13–18 µm in size. Their stem is colorless and up to 70 µm long.
distribution
The known distribution area of Puccinia spegazzinii extends from South America to the southern USA .
ecology
The host plants of Puccinia spegazzinii are different species of the genus Mikania . The fungus feeds on the nutrients present in the storage tissue of the plants, its spore beds later break through the leaf surface and release spores. The species goes through a development cycle, of which only Telien and their host are known; Uredien, Spermogonia and Aecien could not be assigned to her.
meaning
Puccinia spegazzinii is also being tested for biological pest control against Mikania micrantha in Asia and Papua New Guinea.
literature
- George Baker Cummins : Rust Fungi on Legumes and Composites in North America . University of Arizona Press, Tucson 1978, ISBN 0-8165-0653-1 .
Individual evidence
- ↑ MD Daya, AP Kawib, CA Ellison, 2013. Assessing the potential of the rust fungus Puccinia spegazzinii as a classical biological control agent for the invasive weed Mikania micrantha in Papua New Guinea. Biological Control 67: 253-261. doi : 10.1016 / j.biocontrol.2013.08.007