2,4-D for Post-Emergence Weed Control


pressures the spray delivery angle of this nozzle will vary
from 52 to 94 degrees.


Fig. 11.-Commercial types of fish-tail nozzles. Principal parts of one
 nozzle are shown at right.

 The factors influencing the height at which the nozzles
should be placed above the tops of the weeds are illustrated
in Figure 13A. The four nozzles described in Figure 12, with
angles of spray delivery of 650, 800, 950 and 110" at 40 pounds
pressure per square inch, will cover a swath of 25.5, 33.6, 43.7
and 57.1 inches, respectively, when the nozzle is located 20
inches above the tops of the weeds. High nozzle placement may
allow an undesirable modification of the spray pattern by wind.