How to apply Hydrilla killer
For optimum effectiveness apply early in the day under calm, sunny conditions when water temperatures are at least 60 degrees. This will ensure that the hydrilla killer does not drift away or wash away quickly.
Treat when growth first begins to appear or create a nuisance, if possible. The sooner the better as it is esier to kill when they are young.
Apply in a manner that will ensure even distribution of the chemical within the treatment area. Spray back and forth
Re-treat areas if re-growth begins to appear and seasonal control is desired. Allow one to two weeks between consecutive treatments. You can target small areas if necessary.
Allow seven to ten days to observe the effects of treatment (bleaching and breaking apart of plant material). You will notice the dead hydrilla on the shoreline. That is great news.
You can use your basic sprayer purchased from any hardware store. They are also sold at Wal-Marts and K-Marts
There are a number of considerations to take into effect when applying.
Waterfront Property
Small Pond
River or Moving water
Waterfront Property
Calculate the number of cubic feet of water to treat.
Multiply # of feet of shoreline X Distance from Shore to
treat X Average Depth. That will give you total cubic feet to treat.
Example: A house has 100 feet of shoreline, with hydrilla from shore to 25 feet out. The water depth is a gradual slope from shore to 10 feet deep.
100
X
25
X
5
= 12,500
cubic foot
(feet of shoreline) (Distance
from shore to treat)
(Average Depth)
(total cubic feet)
Early Season/Low Density - 1 gallon will treat 36,300 cubic feet.
Mid Season/Moderate Density - 1 gallon will treat 20,743 cubic feet.
Late Season/High Density - 16,133 cubic feet.
Before applying, dilute the required amount with enough water to ensure even distribution with the type of equipment being used. For most effective results, apply under calm and sunny conditions when water temperature is at least 60 degrees. Break up floating algae mats before spraying or while application is being made. Use hand or power sprayer adjusted to rain sized droplets. Spray shoreline areas first to avoid trapping fish.
Under conditions of heavy infestation, treat only 1/3 to 1/2 of the water body at a time to avoid fish suffocation caused by oxygen depletion from decaying algae.
Small Pond
It is not easy to calculate cubic foot in a small lake. If you know the number of acres. There are 43,650 square feet in an acre. If not, you will have to figure out a system to graph the lake.
Early Season/Low Density - 1 gallon will treat 36,300 cubic feet.
Mid Season/Moderate Density - 1 gallon will treat 20,743 cubic feet.
Late Season/High Density - 16,133 cubic feet.
Before applying, dilute the required amount with enough water to ensure even distribution with the type of equipment being used. For most effective results, apply under calm and sunny conditions when water temperature is at least 60 degrees. Break up floating algae mats before
spraying or while application is being made. Use hand or power sprayer adjusted to rain sized droplets. Spray shoreline areas first to avoid trapping fish.
Under conditions of heavy infestation, treat only 1/3 to 1/2 of the water body at a time to avoid fish suffocation caused by oxygen depletion from decaying algae.
River
Drip System Application. For use in potable water and irrigation conveyance systems. Hydrilla Killer should be applied as soon as algae or hydrilla begins to interfere noticeably with normal delivery of water. (clogging of lateral headgates, suction screens, weed screens and siphon tubes). Delaying treatment could perpetuate the problem causing massing and compacting of plants. Heavy infestations and low flow conditions increasing water flow rate during application may be necessary.
Prior to treatment it is important to accurately determine water flow rates. In the absence of weirs, orivaces, or similar devices which give accurate water flow measurements, volume of flow may be estimated by the following formula:
Average width (feet) x Average Depth (feet) x Velocity*
(feet/second) x .09 = cubic feet per second.
*Velocity is the time it takes a floating object to travel a given distance. Dividing the distance traveled in feet by the time (seconds) This measurement should be repeated at least three times at the intended application site and then averaged.
Lets say our stream is 20 feet wide average depth is 5 feet and an object travels 20 feet in 45 seconds. Our velocity would be 20/45 = .44
Average width (feet) x Average Depth (feet) x Velocity*
(feet/second) x .09 = cubic feet per second.
20 X 5 .44 X .09 =
3.96 cubic feet per second.
After accurately determining the water flow rate in cubic feet per second. (C.F.S.) find the corresponding drip rate.
CFS Quarts per hour
1 1
2 2
3 3
4 4
5 5
Calculate the quantity needed to maintain the drip rate for a period of 3 hours by multiplying Quarts/Hour x 3 Introduction of the chemical should be made in the channel at weirs or other turbulence creating structures to promote the dispersion of chemicals. In our example we would
need 3 quarts.
Pour the required amount into a drum or tank equipped with a brass needle valve and constructed to maintain a constant drip rate. Use a stop watch and appropriate measuring container to set the desired drip rate. Readjust according if flow rate changes during the 3 hour treatment period.
Statement of Practical Treatment First Aid
If in eyes: Call a physician. Hold eyelids open and flush with a gentle stream of water for 15 minutes.
If on skin: Wash with plenty of soap and water. Get medical attention.
If swallowed: Drink promptly a large quantity of milk, egg white, gelatin solution, or, if these are not available, large quantities of water. Avoid alcohol. Get medical attention. do not induce vomiting or give anything by mouth to an unconscious person.