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Franklinton, LA | I hope someone can explain this to me. The plane is moving 140 MPH or 205 feet per second. The crop canopy will move for about 2 seconds after the plane passes over. Normally the spray deposits into the canopy about 4 seconds after the plane passes over. There is very little canopy movement when the spray cloud reaches the target. If you have a cross wind, most of the spray will deposit downwind of the aircraft rather than under the aircraft. If you don't believe this, you can take a close look at an ag aircraft while it is spraying.
The ag chemical manufacturers must test the product to get EPA approval and a label. They write the label based on the way the product was tested. In other words, if the spray boom is moving 5 MPH and 20 - 30" over the crop, you need 20 GPA. On the other hand, if the spray boom is moving 140 MPH and 12 - 15' above the crop, you only need ??? GPA. I don't understand that one either!
In most states you must be a licensed, commercial pesticide applicator to apply ag chemicals for hire. Also, they must have liability insurance and the spray vehicle operator must be licensed. If you have a spray drift problem, the drift liability insurance will not be required to pay if the material is not applied in accordance with the label and all state regulations. In most states the farmer can be forced to pay for spray drift damage if the applicator cannot or will not pay. | |
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Drone spraying
