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WorksheetsAquatic Practice Test
Total questions: 31
Worksheet time: 16mins
What are some specific problems caused by aquatic weeds?
Aquatic weeds restrict or prevent recreational activities
Will create habitats for fish to live in
Can help out desirable species by improving water quality
Small amounts to do not provide habitats for fish
What is the invasive species that grows in the sediment in waters as deep as 15 feet and once it reaches surface, forms a canopy over the surface that can block out the light, and block out the light that filters to other native plants?
duckweed (free-floating)
Eurasian water milfoil (submerged)
sago pondweed (submerged)
cattails (emergent)
What happens when blue-green algae blooms?
Water can become toxic and kill livestock that drink the water
The algae captures the nutrients in the water, making the water more potable
The bloom causes the oxygen in the water to quickly deplete
Falls to the bottom of the pond and clears the water
What happens when blue-green algae blooms die off?
will turn the color of the water shades of blue and green
can cause oxygen depletion and fish kills
creates a thick mat trapping oxygen bubbles and rising to the top of the pond
This improves the smell of the pond
What are the botanical groups that most aquatic weeds fall into?
algae
flowering plants
grasses
A and B
Both algae and flowering plants reproduce by
spores
fragmentation
seeds
cell division
What free-floating plant can become so prolific that a blanket of 1-2 inches can grow, blocking out the sun and causing the bottom water to become anaerobic?
Coontail
Southern Naiad
Duckweed
Filamentous algae
What plant quickly weeds out contending aquatic plants and is considered "exotic" in the state of Illinois?
American elodea
Emergent purple loosestrife
Water milfoil
Spattdock
What happens to a water body after plants are killed off?
The decaying plants fall to the bottom and nutrients are recycled into the sediment
The water becomes turbid and muddy
the loss of plants increases the amount of dissolved oxygen in the water
What are the major factors that regulate plant growth
Water temperature and nutrients
Time of year and substrate
Sunlight and nutrients
Water turbidity and plant density
Aquatic Weeds prosper and grow in locations where:
One or more of the proper nutrients are present
As little as 1% sunlight penetration is present
Water temperature is warm
All of the above
What is a benefit of using mechanical controls on ponds?
The machines cannot be used on ponds f less than 3 to 4 feet deep
The cut plants can float in the water and can develop roots in new areas
Harvesting only needs to be done once a year
All types of aquatic vegetation can be removed
What agency do you need to contact to get a permit to stock grass carp?
None. The state of Illinois does not require a permit for grass carp.
Illinois Department of Agriculture
Division of Fisheries of the Department of Conservation
Illinois Department of Natural Resources
What purple flowering invasive plant is classified as an exotic weed in Illinois and is illegal to sell, distribute, or plant without a permit issued by Illinois Department of Natural Resources (IDNR)?
Water milfoil
Water lily
Purple loosestrife
Arrowhead
An effective way to remove nutrient input sources would be
Installing sod along drainage areas to prevent runoff and absorb nutrients
Discontinue the use of fertilizers in a 10-20 ft strip around the body of water
Preventing livestock from entering the body of water
All of the above
When is the best time of year to treat for water milfoil and American pondweed?
In the late spring or early summer before plants have gone to seed
In the very early spring before plants are visible
In the late summer because warm water causes the oxygen levels to be higher, causing a greater margin of safety for fish
When water is cold (below 60 degrees) and the plants are young
What chemical is systemic surfactant?
Diquat
Endothall
Glyphosate
Fluidone
What chemical is extremely toxic to fish?
2, 4-D ester
Fluridone
Copper Chelates
Diquat
What would be the best way to treat a fast moving stream which is heavily infested with milfoil?
Use an herbicide that is adhered to floating Styrofoam particles
Use an herbicide that can be slowly absorbed on sand particles that sink to the bottom
Use an herbicide that is quickly absorbed and use trailing hoses
Use a granular herbicide
In a successful weed management program, herbicides will only be considered after:
All mechanical and biological methods have been exhausted
You take into consideration the uses of the particular water body
Sunlight and nutrient exposure is limited
All of the above
You have a rectangular pond that is 250 ft by 150 ft. Two transects are made with a measurement taken every 50 ft. The depths are 2, 5, 7, and 8, 5, and 7. What is the volume of the pond in acre-feet?
2.22 acre-ft
3.61 acre-ft
4.95 acre-ft
5.62 acre-ft
An injection application is going to be made from a boat with a boom that has 5 trailing hoses with nozzles, and each nozzle delivers 1.0 GPM. The width of the boom is 8 feet. The boat operates at 5 MPH while spraying. What is the spray application rate in GPA?
12.3 GPA
23.8 GPA
30.9 GPA
42.5 GPA
What needs to be known in order to calculate the correct amount of herbicide to use?
area or volume to be treated
dosage required for the specific weed
amount of formulated material required to give the proper dosage
all of the above
How many pounds or copper sulfate are required to treat a 5 acre-ft pond at a dosage of 4 parts per million?
20 pounds
33 pounds
54 pounds
68 pounds
How much copper sulfate pentahydrate (CSP) is required to treat a 5 acre-ft pond at 4ppm? (25 percent of CSP is elemental copper)?
80 pounds
120 pounds
216 pounds
250 pounds
A chemical used for fish control is called
pesticides
herbicides
piscicides
copper sulfate
In Illinois, who can apply piscicides?
Any one who possesses a chemical applicator license
A farmer who needs to increase the flow of water in his irrigation canals
Only a fisheries agent from the Department of Conservation
Any one who possesses a chemical operators license
What is the name of an antifungal antibiotic that is absorbed by the gills of a fish and interferes with respiration?
Antimycin A
Rotenone
Copper Sulfate
Aquathol K
Who do you need to contact if there is a fish kill in a private water body and a pesticide is suspected?
Illinois Environmental Protection Agency
Illinois Department of Agriculture
US Environmental Protection Agency
Illinois Department of Natural Resources
Who do you need to contact if there is a fish kill from properly applied herbicide which will flow into the local drinking water?
Illinois Department of Agriculture
Illinois Environmental Protection Agency
Illinois Department of Natural Resources
Illinois Department of Public Health
In a body of water filled with photosynthetic plants, what time of day has the most dissolved oxygen in the water?
In the early morning
Late afternoon
Midday or early afternoon
At night
