Quiz Flashcards
Which agency requires an aquatic pesticide permit for an application to surface waters for plant and animal control?
Wa dept of ecology
Wa biodiversity council
Wa dept of agriculture
Wa dept of fish and wildlife
Wa Dept of Ecology
Which two herbicides are toxic to aquatic invertebrates (crabs, shrimp, insects) at recommended doses?
Acrolein and xylene
Glysophate and 2,4-D
Diquat and empty all
Fluidone and triclopyr
Acrolein and xylene
When algae die off in large numbers they can cause significantly increased oxygen levels in water, which result in fish kill.
True
False
False
Which agency must grant approval prior to stocking grass for carp for vegetation control?
Wa dept of ecology
Wa biodiversity council
Wa dept of agriculture
Wa dept of fish and wildlife
Wa dept of fish and wildlife
Applying herbicides to flowing water:
Can only be accomplished with dry formulations
Is common in stream situations to control vegetation
Is a concern because of downstream use of treated water
Requires lower rates of chemical because the water is moving downstream
Is a concern because of downstream use of treated water
Using environmental manipulation of water levels to control fish can be effective:
By increasing turbidity
Only for certain species of fish
By reducing oxygen concentrations
By pushing fish out of protective weedy areas into open water
By pushing fish out of protective weedy areas into open water
What mosquito stage is called a wriggler?
Egg
Larva
Pupa
Adult
Larva
Which biocontrol agent (species) is a fish that feeds on mosquito larva?
Gambusia affnis
Bacillis spaericus
Bacillus israelensis
Lagenidium gigantem
Gambusia affnis
Which of the following group of flies is the only one that does not require a blood meal?
Midges
Black flies
Mosquitos
No-see-ums
Midges
You have a pond that has 10 surface acres and an average depth of 5 feet. The label requires you to apply 4 pounds of product per acre foot of water. How much product do you need to treat this pond?
12.5 pounds
20 pounds
40 pounds
200 pounds
200 pounds
10ftx5ft= 50 ft 50x4= 200
You have a rectangular pond that measures 200 feet by 400 feet. Emergent vegetation is around the entire pond and extends into the pond for ten feet. The application rate is 6 pints per acre as a broadcast treatment. How many pints are needed to treat the 10 foot perimeter of emergency vegetation? ( 1 acre = 43, 560 sq ft)
0.3 pints
1.6 pints
11 pints
4 quarts
1.6
Whole pond= 400x200 = 80,000 sq ft
Untreated area= 380x180= 68,400 sq ft
Treated area = 80,000-68,400= 11,600 sq ft
Acres= 11,600 sq ft/43,560 sq ft = .266 acres
Product needed = .266x6=1.6
You need to treat a ditch at a rate of 400 ppmv (parts for million by volume). The ditch is 8 feet wide and averages 2.5 feet deep with a flow of 1 foot per second. How many gallons of product are needed to maintain 400 Ppmv for 30 minutes? (1 cubic foot water = 7.5 gallons).
1.8
36
108
144
108.
Cross sections area of rectangular channel: 8 x 2.5 = 20
Cfs: 20 x 1 = 20
Fill out Ppmv formula:
400 = (gal of chemical x 1,000,000)/(20x450x30)
Solve for gal
400= (gal of chemical x 1,000,000)/ 270,000
108,000,000= gal of chemical x 1,000,000
108= gal of chemical
