click below
click below
Normal Size Small Size show me how
Cat L Chapter 11
Chapter 11 - Black Flies
Question | Answer |
---|---|
What is a common name for black flies? | Biting gnats |
What is the primary control material used to treat for black flies? | BTI |
What is the abbreviated form of Bacillus thuringiensis israelensis? | BTI |
What is the term for the velocity of moving water? | Discharge |
How is discharge measured? | Cubic feet per second |
Why do female black flies feed on blood? | Egg development |
Black fly control can be done with a permit from which agency? | Minnesota Department of Natural Resources |
How many species of black fly occur in Minnesota? | 30 |
How many species of black flies in Minnesota are considered pests? | 4 |
What is the ideal location to collect black flies for surveillance purposes? | Edge of the woods in a shaded area |
True or False: Black flies and biting gnats are the same thing. | True |
When are female black flies most active? | During the day, a couple hours after sunrise to a couple hours before sunset |
True or False: Depending on the species, black flies feed on humans, livestock, poultry, wildlife, and birds. | True |
True or False: Black fly larvae require moving water to develop, but only lay eggs directly onto the water. | False |
What is the ideal site for surveilling black fly larvae in mid-April? | Small streams |
What is the best way to determine treatment effectiveness? | Adult surveillance |
True or False: While Bti is the most effective product for controlling black flies, other products can be used at the technician’s discretion. | False |
After the application of Bti, post-treatment checks are conducted generally _ hours after a treatment at 250 meters downstream from the application site. | Three |
_ or more larvae are collected to determine the rate of control. The control is then calculated by dividing the number of dead by the total number of larvae collected. | 100 |
True or False: Non-target monitoring by the MMCD has shown a substantial effect on populations of zooplankton and many insects in treatment areas compared to nontreatment areas, but treatment is allowed to continue because it’s viewed as beneficial. | False |