Quantcast Herbicides For Use in Drainage and Irrigation Canals

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HERBICIDES FOR USE IN DRAINAGE AND IRRIGATION CANALS
Treat men t
(Application rate;
cost per pound)
Time of Application
Weeds Controlled
Remarks
SUBMERSED: FLOWING WATER
Acrolein (1-2.5 gal/ft3 wa-
For canals smaller than 200 ft3/sec, inject into canal at
Before weed growth be-
All submersed weeds ex-
ter flow/sec; $2.40/lb,
comes dense.
cept water plantain.
beginning of weed infestation. Apply for 1/2 hour using
$14.50/gal)
especially adapted equipment (otherwise application can
be hazardous); effectively kills plants 6 to 20 miles
downstream depending on weed density, water tempera-
ture, and rate of flow. Toxic to fish.
Inject into large canals (200 to 2,000 or more ft3/sec) at
Acrolein (0.1-0.6 p/m by
Before weed growth be-
All submersed weeds ex-
weight; $2.40/lb)
comes dense.
cept water plantain.
one location during a period of 8 to 48 hours. Within this
range, use lower concentrations and longer periods of
applications as size of canal increases. Apply from special
cylinders under nitrogen gas pressure. May be toxic to
fish.
SUBMERSED: LITTLE OR NO WATER FLOW
Acrolein (4-7 p/m by vol-
Before weed growth be-
Most submersed weed spe-
Apply below water surface continuously along canal with
ume; $2.40 lb)
comes dense.
cies.
specially adapted equipment (otherwise application can be
hazardous). Toxic to fish.
Diquat (0.25-1 p/m by
Before weed growth be-
Most submersed weed spe-
Apply on or below water surface continuously along
weight; $34.00/lb)
comes dense.
cies.
canal. Allow at least 12 hour exposure of weeds to treated
water. Do not use in muddy or turbid water.
Endothall (dimethylalkyla-
Before weed growth be-
Most submersed weed spe-
Apply on or below water surface continuously along
mine salt) (1.5-4 p/m by
comes dense.
cies.
canal. Allow at least 12 hour exposure of weeds to treated
weight; $10.40/lb)
water. Toxic to fish.
Diuron (16-48 lb/a;
While canals are not in use
Grasses and broadleaf
Apply to exposed bottoms. Will injure trees with roots
$4.70/lb)
and before seasonal rains.
weeds.
extending into ditch.





 


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