The term Ultra-Low Volume (ULV) (spraying) is used in the context of pesticide application.
Ultra-low volume application of pesticides has been defined as spraying at a Volume Application Rate (VAR) of less than 5 L/ha for field crops or less than 50 L/ha for tree/bush crops. VARs of 0.25 – 2 l/ha are typical for aerial ULV application to forest or migratory pests.
ULV spraying is a well-established spraying technique and remains the standard method of locust control with pesticides and is also widely used by cotton farmers in central-southern and western Africa. It has also been used in massive aerial spraying campaigns against disease vectors such as the tse-tse fly.
A major benefit of ULV application is high work rate (i.e. hectares can be treated in one day). It is a good option if all (or some) of these conditions apply:
- large area of land to treat
- rapid response required
- little or no water for making pesticide tank mixtures
- logistical problems for supplies
- difficult terrain: poor access to target site
Read more about Ultra-low Volume: Equipment, Ultra Low Volume Fogging Machines, See Also
Famous quotes containing the word volume:
“A tattered copy of Johnson’s large Dictionary was a great delight to me, on account of the specimens of English versifications which I found in the Introduction. I learned them as if they were so many poems. I used to keep this old volume close to my pillow; and I amused myself when I awoke in the morning by reciting its jingling contrasts of iambic and trochaic and dactylic metre, and thinking what a charming occupation it must be to “make up” verses.”
—Lucy Larcom (1824–1893)