Oregon Aquatic Weed Control: Discussion on permits, consultations, & regulations
Aquatic Weed Identification - UC Cooperative Extensionucanr.edu/sites/csnce/files/57535.pdf ·...
Transcript of Aquatic Weed Identification - UC Cooperative Extensionucanr.edu/sites/csnce/files/57535.pdf ·...
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Aquatic WeedAquatic Weed
IdentificationIdentification
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From C. A. Lembi1997
Algae
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Planktonic Algae
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Algae Bloom
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Filamentous Algae -- Floating Mats
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Chara sp.
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NitellaNitella spp.
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Each of the four types of aquatic plants favors a certain water depth. Typically, however, the growth areas are not sharply divided. Expect to see overlap in growth--submerged plants, for example, interspersed among floating-leaf varieties.
Types of Aquatic Plants
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Pacific mosquitofernAzolla filiculoides
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Common duckweedLemna minor
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Water hyacinthEichhornia crassipes
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F M M J J A S O N DJ A
After Kautsky, 1987
Seasonal Development of Sago Pondweed
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CoontailCeratophyllum demersum
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ParrotfeatherMyriophyllum aquaticum
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Western watermilfoilMyriophyllum hippuroides
An uncommon native speciesnot considered weedy
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Eurasian watermilfoilMyriophyllum spicatum
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Northern watermilfoilMyriophyllum sibiricum
Eurasian watermilfoil
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HydrillaHydrilla verticillata
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Brazilian egeriaEgeria densa
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Common elodeaElodea canadensis
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Curlyleaf pondweedPotamogeton crispus
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Sago pondweedStuckenia pectinatus
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Leafy pondweedPotamogeton foliosus
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Floatleaf pondweedPotamogeton natans
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AmericanPondweed
Potamogetonnodosus
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Creeping waterprimroseLudwigia peploides
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Purple loosestrifeLythrum salicaria
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Purple loosestrife vegetation
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Giant horsetailEquisetum telmateia ssp. braunii
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ScouringrushEquisetum hyemale ssp. affine
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Giant reedArundo donax
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Common cattailTypha latifolia
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Hardstem bulrushScirpus acutus var. occidentalis
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Pale smartweedPolygonum lapathifolium
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Perennial pepperweedLepidium latifolium
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Curlydock
Rumexcrispus
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Himalaya blackberryRubus armeniacus
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