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4.4. Influence of climatic conditions
During application, some factors may determine the interrup-
tion of the spraying. Wind, for example, can drag drops to a
greater or lesser distance in terms of its size or weight. The tem-
perature and especially the relative humidity contribute to the
rapid evaporation of the droplets.
The ideal conditions for spraying are:
• Relative humidity: minimum 50%;
• Wind speed: 2-6 mph;
• Temperature below 86 F.
These limits should be considered according to technology ap-
plication that will be used, adopting the safest class drops within
the boundaries of each situation.
Air velocity around the
nozzle height
Up to 0.6 mph
0.6 to 1.86 mph
1.86 to 4.3 mph
4.3 to 6.2 mph
6.2 to 9.3 mph
Factors
Temperature
Relative humidity
8/35
Description
Calm
Nearly calm
Light breeze
Light wind
Moderate wind
Classes of drops according to weather conditions
Very thin or thin
below 77 F
above 70%
Visible signs
Smoke rises vertically
The smoke is tilted
Slight movement of leaves.
Feel the light wind
Leaves and thin branches in
constant motion
Movement branches. Dust
and pieces of paper are
carried by the wind
Thin or medium
77 to 82 F
60 to 70%
Spraying
Recommended only with
thick, very thick drops
Ideal for spraying
We recommend only the
drift reduction technique
Improper for spraying
Medium or thick
above 77 F
below 60%
Capítulos
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