mikania micrantha presentation
TRANSCRIPT
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Mikania micrantha
Dr. Richard E. Weaver
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The genus Mikania
More than 400 species
Most in tropical America
Very few weedy species
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The genus Mikania
Twining vines
Opposite leaves
Tribe Eupatoriae inflorescence similar to Eupatorium species
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Mikania Flower Heads
4 phyllaries
4 florets
Pappus of capillary bristles
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Mikania Species Native to Florida
Mikania cordifolia
Found• mostly South Florida• tropical America• in hammocks
Has large flower heads
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Mikania Species Native to Florida
Mikania scandens
Found• throughout Florida• eastern USA• in moist habitats
Has small flower heads (includes M. batatifolia)
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Mikania micrantha
Widespread in tropical America including West Indies
Weedy• in tropical Asia & Pacific Islands• Federal & Florida noxious weed• not weedy in natural habitat
Confirmed in continental USA - 2009
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Mikania micranthaIdentification
Leaves• Pale green or yellow-green
Petioles/Stems• Lack red pigment
Flowers • White (unlike pink M. scandens)
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Mikania micranthaIdentification
Phyllaries & inflorescence• glabrous• unlike M. scandens (pilose)
Whole plant• glabrescent• unlike M. scandens
Leaves• upper surface with few glands• unlike M. scandens
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Mikania micranthaIdentification
Pseudostipules
• Rare in Compositae
• Present in some Mikania
• M. micrantha has irregularly toothed flap
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Molecular Research
• Confirmation of identity
• Two possible genotypes
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Eradication & Control
1. Survey 2. Eradication 3. Nurseries 4. Herbicide research
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Survey
CAPS/DPI cooperative effort
20+ locations found
Botanical confirmation
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Eradication
• Manual removal• Seed dispersal• Incineration• No herbicide applied
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Nurseries
• Mostly on boundary fences
• Several nurseries quarantined
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Herbicide Research
• Regrowth from stripped plants
• Brent Sellers research
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Questions?