A project to develop an applied model to simulate pesticide spray deposition and atmospheric transport resulting from orchard air blast spraying has been intitiated. The objective of this effort is to provide a mechanistic model based on physical principles that can be used in exposure analyis and operational planning. The major modules are the description of the release from the sprayer, the interaction with the canopy and the subsequent movement of unscavenged material. Algorithms describing the release from the air blast sprayer will be developed considering either a box approach or discharge from individual nozzles. Data will be collected to fill data gaps in the literature regarding sprayer air velocities and droplet sizes. Canopy capture data in the literature will be utilized but it is anticiapted that additional data will be needed. Sprayers and canopies will be selected from libraries or input by the user. It is likely that this model will be added to the AGDISP template to utilize aspects of existing GUI components such as droplet distribution screens and nozzle/sprayer positioning screens.  This development effort will require validation against field trials. Field trial protocols are being developed.

Development of an applied orchard air blast sprayer pesticide deposition model

254th National Meeting (2017)

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