A number of studies involving numerous citrus sprayers
and a.i. were conducted to determine the droplet sizes generated by different
sprayers operating under user-established settings and the adjustments required
to those settings for the sprayers to meet the 90-mm requirement. In the sprayer
tests, it was found that reductions in engine speed or increases in flow rate were
required to increase droplet sizes to meet the product label-required droplet size.
As the equipment tested here represent the most typical application equipment
used in Florida for asian citrus psyllid control, these results will provide applicators,
growers, and extension agents with general guidelines to ensure that spray
systems are operated in a manner that complies with label restrictions