Pesticides are supplied in a number of
different physical forms, or formulations.
Products may be in the form of dust, aerosol spray,
wettable powder, liquid concentrate, and granules.
The pesticide itself is made of one or more active
ingredients (poison) plus inactive
carriers like clay or oil. Aerosol sprays
also contain a propellent that pressurizes
Dust (D) formulations are dry with
the active ingredient bound to clay or some other
fine powder, or made entirely from pure active
ingredient such as silica or borate. The problem
with dust formulations is they are difficult to
Aerosols sprays (spray cans) are
convenient because the active ingredient is
pre-mixed and you don't need a separate sprayer.
Aerosols are relatively expensive, however, on a per
volume basis and so are best used only for small
Wettable powder (WP) pesticides are
dust-like formulations that are mixed with water, or
sometimes oil, and sprayed through a sprayer.
Wettable powders are economical and solve the
application problems inherent in dust formulations.
Liquid concentrate (LC) pesticides
are diluted with water and applied through some type
of sprayer. Liquid concentrates are economical and
generally easy to apply but you will need a separate
The final commonly used formulation is granular
pesticides (G). Granules are course, dry
pellets that are applied thrugh some type of
spreader. Turf and lawn care pesticides are often
applied as granules.