Quantcast Herbicides for Use in Ponds,Lakes, and Reservoirs

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HERBICIDES FOR USE IN PONDS, LAKES, AND RESERVOIRS
Treatment
(Application rate;
cost per pound)
Time of Application
Weeds Controlled
Remarks
FLOATING: GENERAL CONTROL
Biological control with alli-  Any time, but best results
Alligatorweed
Chemical control may not be necessary if these specific
gatorweed fleabeetle and  if released early in growing
biocontrol insects are present. The fleabeetle is more
alligatorweed stemborer.  season.
active in the southern part of alligatorweed's range
(Florida and across the Gulf Coast region to southern
Louisiana), while the stemborer is active in both the
southern and northern parts of alligatorweed's range (to
southern Arkansas). These insects may not provide con-
trol in areas adjacent to fields subject to heavy insecticide
use, such as near cotton fields. Contact your county agent
or a qualified entomologist for positive identification.
2,4-D amine salts or low-
When actively growing.
Spray to uniformly wet foliage. For hairy or hard-to-wet
Alligatorweed (floating
volatile esters (2-4 lb/100
weeds, or during the rainy season, add 10 gal of fuel oil
mats), duckweed, water-
gal of spray; $2.60/lb)
and 1 pt of emulsifier. Repeat treatments every 4 to 6
fern, waterlettuce, and wa-
terhyacinth.
weeks as required for control. Do not use near crops
sensitive to 2,4-D. Use 2,4-D esters and formulations that
are least toxic to fish. Do not exceed tolerance of 0.1 p/m
by weight in potable or irrigation water.
FLOATING: NEAR CROPS SENSITIVE TO 2,4-D
Amitrole-T (1-1.5 lb/a;
When actively growing.
Waterhyacinth
Apply as a surface spray in 150 to 200 gal water, or as an
$10.25/lb)
aerial spray in 7.5 gal water per acre. Use only in drainage
ditches and marshes. Do not contaminate irrigation or
domestic water, or water used for livestock.
Diquat (0.5-1 p/m by
When actively growing.
Duckweed (in nonflowing
Inject diquat into water or spray on foliage. Do not use
weight; $34.00/lb)
diquat in muddy water. Do not contaminate irrigation or
water).
potable water, or water used for livestock.





 


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