Advanced Chemigation Systems for Environmental Safety and Groundwater Protection

by William M. Lyle, Texas Agricultural Experiment, Station, United States,
James P. Bordovsky, Texas Agricultural Experiment, Station, United States,

Document Type: Proceeding Paper

Part of: Planning Now for Irrigation and Drainage in the 21st Century


A multifunction irrigation system has been developed which utilizes a separate dynamic in-canopy nozzle system for chemical application. Testing the system with a lithium tracer on four crops revealed substantial coverage improvement for the dynamic in-canopy nozzle system over traditional overhead chemigation and aerial application. The application of commercial pesticides on various crops and insect infestations has verified the superiority of the in-canopy application. Other stationary or manually adjustable in-canopy nozzles systems are being developed and tested which are producing similar results. Chemical application with low water volume (3,200 to 6,300 L/ha) and at rates which are a small fraction (1/4 to 1/16) of registered rates, is resulting in environmental improved pest control.

Subject Headings: Environmental issues | Safety | Groundwater | Chemicals | Crops | Chemical treatment | Groundwater pollution | Irrigation systems

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