Pesticides Flashcards
Most spray drifts consist of droplets having.
Diameters less than 200 microns
The fall rate of a spray droplet is roughly to the (_________) of the droplets diameter.
Square
In general, as air temperature increases the potential for spray drift also
Increases
For any given set of Nozzles, increasing pump pressure will;
Increase spray drift potential
Assuming all other spray systems variables, pump pressures, spray mix velocity are kept constant, the nozzle tip orifice diameter increases, the percentages of spray volume composed of small droplets
decrease
A good ag pilot should be prepared to refuse for spray service at a particular time if he thinks it is a safety hazard, etc
True
Spray drift only occurs ________ of the spray application
downwind
One of the most resent navigation tools today is GPS. GPS stand for
Global positioning system
Spray droplet size decreases as aircraft travel speed increases because
air shear action on spray droplets causes them to break up, making smaller droplets
Who is responsible for ensuring the notification provision of the Workers Protection Standard?
The on-site field crew members
In general, solid stream nozzles tend to generate
relatively coarse sprays, as do low-drift nozzles
In order to double the spray out-put from a nozzle, pump pressure must be approzimately
Quadrupled (4x increase)
Increasing the Ram-Air Spreader hopper feed rate will typically cause;
a decreased in swath width
Microweather which ground level or within plant canopy weather conditions at or near the target site,
Affects all outdoor pesticide applications
Unsatisfactory single-pass distribution patterns result from most ram-air devices if the target site application rate is either
Less than 50lbs. per acre
More than 250 lbs. per acre
Targeted ejection rate is more than 35 lbs. per second
When ferrying to and from an application site it is recommended that the aircraft maintain a minimum altitude of
500 feet
A boom discharge rate is typically expressed in
gallons per minute (gpm)
a nozzle that generates spray droplets by causing the spray mix liquid to be flung outward from the center and passes through a rotating screen is called
rotary atomizers
Resent findings of aerial drift research indicate that output from pattern nozzles are likely to;
emit drift-prone spray droplets unless the cone pattern tips have been configured to produce coarse spray droplets
pesticides formulated as a dust are
particularly prone to off target movement