Selective Weed Sprayers Save Herbicide Input and Dollars

Issue: Agricultural producers are facing some of the most challenging times in history. Low commodity prices coupled with less than optimal environmental conditions have forced many growers to go out of business. One way to help fight the cost of high inputs is to use less pesticides. A light-activated weed sprayer that saves 50 to 85% on herbicide bills may provide some relief is todays challenging environment.

What has been done/discovered: After two years of research, we found that this sprayer can control weeds similar to conventional spray applications; however, inconsistent weed control has been observed within years and within crops. Yield from plots treated with the light-activated sprayer were also similar to plots treated with conventional applications. Herbicide savings during three applications ranged from 56 to 85% in 2000 and between 62 and 84% in 2001. Unfortunately, even with these savings, it would be hard to justify purchasing this equipment at the current suggested price. If an 8 row unit costs $38,000 and herbicide savings are 65 and 80%, it will take about 6 years to pay for this equipment.

Impact: After two years of research, we found that a light-activated weed sprayer can control weeds similar to conventional spray applications and herbicide savings from 56 to 85% were recorded. Inconsistent weed control and the high cost of purchasing this equipment are the current draw backs of this technology.

Funding Sources: Precision Agriculture Initiative

Contact:
Peter A. Dotray
Associate Professor
Research & Extension Center - Lubbock
Texas A&M Agriculture Program
Phone: (806)746-6101
Fax: (806)746-6528
p-dotray@tamu.edu
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