HERBICIDES FOR USE IN PONDS, LAKES, AND RESERVOIRS -- Continued
cost per pound)
Time of Application
Diquat (1-1.5 lb/a;
When actively growing.
Waterhyacinth and water-
Apply as a surface spray in 150 to 200 gal water, or as an
aerial spray in 7.5 gal water per acre. Do not contaminate
irrigation or domestic water, or water used for livestock.
When actively growing. E m e r g e d a n d f l o a t i n g
Add 1 to 2 quarts of Ortho X-77 surfactant per 100
Glyphosate (1-3 lb/a;
broadleaf weeds and
gallons spray solution. Avoid washoff by boat backwash
or rainfall within 6 hours of application. Consult local
state fish and game agency and water control authority
before applying to public water.
EMERSED AND MARGINAL: ROOTED UNDERWEAR, TOPS ABOVE WATER (BROADLEAF WEEDS)
Biological control with alli-
Anytime, but best results if Alligatorweed, floating or
gatorweed fleabeetle and
released early in growing rooted emersed.
Dichlobenil (4-8 lb/a; gran- At or just before emer- Lotus, spatterdock, white
Spread granules evenly over the water surface. Do not use
waterlily, and others.
treated water for irrigation, livestock, or domestic pur-
poses. Do not use fish for food or feed within 90 days
2,4-D, low-volatile ester When actively growing.
Arrowhead, lotus, pickerel-
Apply in oil or in oil-water emulsion (1:10 or 1:20) in
(2-4 lb/a; $2.60/lb)
weed, smartweed, spatter-
sufficient volume to give uniform coverage. Apply granu-
dock, spikerush, water-
lar formulation evenly over water surface with spreader.
primrose, white waterlily,
Do not exceed 0.1 p/m by weight tolerance for irrigation,
and other plants with waxy
domestic water, or stock watering.
EMERSED AND MARGINAL: ROOTED UNDERWATER, TOPS ABOVE WATER (GRASS AND GRASSLIKE WEEDS)