AquaticVegetationID&ManagementToddD.Sink,Ph.D.

AssociateDepartmentHeadforExtension&AssociateProfessor,DepartmentofWildlife&FisheriesSciences

FisheriesExtensionSpecialist,TexasA&MAgriLife ExtensionService

Improving Lives. Improving Texas.

Aquatic Vegetation Management◦ AquaPlant Website - http://aquaplant.tamu.edu/

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Filamentous Algae Chelated copper complexes, diquat, or copper sulfateTank mix copper and diquat for best resultsMozambique tilapia

Chara (skunk grass)/NitellaChelated copper complexes or copper sulfate

Duckweed & WatermealCarfentrazone, penoxsulam, fluridone – systemic $$$$ Flumioxazin – contact $$ Diquat (duckweed only) $Tilapia and ducks – but have other issues – integrated management

Azolla or Mosquito FernCarfentrazone, diquat, fluridone, flumioxazin, penoxsulam, tilapia

Water Hyacinth

Increased water loss of 200 – 300%Non‐native

2,4-D, diquat, imazamox, imazapyr, or penoxsulam

Manual removal

Submerged Plants can be ConfusingEgeria

Hydrilla

Elodea

Hydrilla common – Egeria& Elodea not so much

Do not rake or cut!

If unsure diquat, endothall, fluridone, or penoxsulam kill them all

Grass Carp - Excellent

Hydrilla Elodea Egeria

If unsure diquat, endothall, fluridone, or penoxsulam kill them all

Grass Carp - E

Coontail

Seeds & Fruiting Bodies

Diquat, endothall, fluridone, flumioxazin

Grass carp – F-G

No raking or cutting!

Southern naiad (bushy pondweed)

Diquat, endothall, fluridone

Grass carp - E

Native, good fish habitat – can become problematic

Diquat, endothall, fluridone, imazamoxGrass carp - E

Submerged - bispyribac, carfentrazone, chelated copper + diquat, endothall, fluridone, penoxsulamEmerged tops - triclopyr, 2,4-DNot grass carp

Watermilfoil(s)

Illinois pondweedNative, good fish habitat, wildlife food

Can become too dense

diquat, endothall, fluridone, imazamox

Grass carp - E

Water Primrose

Land Water

2,4-D, glyphosate, imazamox, imazapyr, triclopyr or mowing/pulling

mowing

Alligatorweed

Non-Native

Cattail

Increase water evaporation 75-80%

Glyphosate, imazamox, or imazapyr

White or Fragrant

Spatterdock or Cow LilyYellow or Mexican Lily

Banana or Floating Hearts

Water Lilies

American Lotus

Mexican water lilyWater Shield

Floating Hearts Spatterdock

White water lily

Water lilies, lotus, & spatterdockFluridone, imazamox, imazapyr, triclopyr,

2,4-D or glyphosate

Rushes are round & sedges have edges – No! Glyphosate or imazapyr

Smartweed (water pepper)Glyphosate, 2,4-D

WaterleafGlyphosate, 2,4-D

American water willowNative, beneficial, good fish habitat – dense growthGlyphosate, imazapyr, triclopyr, 2,4-D

Arundo donax or Giant Reed

0

20,000

40,000

60,000

80,000

100,000

120,000

Native Arundo

Acr

e-ft

Annual Water Use

Imazapyr, triclopyr, glyphosate, or imazamox – then burn