Controlled droplet size in ultra low volume ground borne spray application of insecticide

摘要

Apparatus and method is provided for applying agriculturally active substances in a controlled manner from the ground in the most effective droplet size range and at ultra low volumes so that efficiency is optimized while contamination of areas adjacent to the targeted area is greatly reduced. The method and apparatus comprise modification of spray units for controlled droplet atomizers comprising at least one tangential vortex crossflow fan having one or more controlled droplet atomizers in the throat of the fan and upstream of the mouth or wide emission opening of the fan, by positioning a wind deflector in the immediate vicinity behind the atomizer so that the atomizer is shielded from direct impingement of the wind generated by the fan and maintaining the liquid active agricultural substance at a temperature at which the liquid has an appropriate fluidity for the desired droplet size and operation of the modified spray unit within fixed parameters of pump speed, fan speed, atomizer turns and tractor velocity to achieve a narrow distribution of droplet sizes within the desired range while emitting relatively low volumes of the active substance in a specific area.