Sentera's drone mapping technology can reduce chemical use by 70%

Date:07-30-2024

By Dan Crummett, Farm Equipment magazine

Recent digital technology improvements have spawned the ability to scan entire fields quickly and inexpensively with drone flights, then provide maps identifying specific weeds and their locations -- all in about 12 hours.

For the past 3 years, Minnesota-based plant analytics service Sentera has been proving its in-house designed sensors are capable of pin-pointing specific weed species as small as ¼ inch and verifying those findings with university-based ground-truthing research. The correlations of what Sentera's drones are seeing and what agronomists on the ground find are about 99%.

Eric Tapale, Sentera's chief technology officer and founder, says the improvement in sensor resolution plus a corresponding recent leap in digital technology will make significant improvements in farm ROI by reducing herbicide use. Sentera's technology allows full fields of drone footage to be analyzed in readily useable form without stitching several files together.

In the Field

Sentera's Aerial WeedScout has been under beta testing on about 10,000 Corn Belt acres over the past 3 seasons and has shown 70% savings in herbicide costs over traditional full-field broadcast applications.

"When we overfly a field, we know exactly which species of weeds are present and where, and that enables agronomists on the ground to determine the appropriate crop protection product and the quantity needed to treat the infestations," Tapale says. "By treating only the areas affected by weed pressure, additional herbicides no longer will be applied to unaffected crops. The savings can be astounding."

Sentera began developing Aerial WeedScout in 2018 and part of that R&D includes new sensors capable of 1.5 mm resolution per pixel. That clarity, combined with the company's artificial intelligence (AI) library of plant characteristics developed over 10 years of crop stand and crop condition sensing, enable early detection of weeds at optimum growth stages for herbicidal control. Growers or their farm service organizations can fly the fields and have actionable maps to develop weed control prescriptions within about 12 hours.

Satellite imagery generally lacks such a sharp eye and often requires several days to provide decision-making information.

"By treating only the areas affected by weed pressure, the savings can be astounding..."

"Timing is a great selling point for Aerial WeedScout, but the new system also puts a new level of precision within easy reach of anyone with a sprayer with nozzle or section control," says Brian Wenngatz, Sentera CEO. "Our system is very flexible and can be accessed directly with on-farm drones or through our extensive pilot/drone network across the U.S."

Cost Savings

Wenngatz and Taipale are confident Aerial WeedScout offers upfront and long-term savings to growers who recoil at the cost of new AI-equipped sprayers and weeders that incorporate on-board sensing and AI-directed application.

"Initially the program eliminates the need for new equipment," Taipale says. "While we are a two-step system, we can run sprayers at normal field speeds with accurate application and not have to slow down to give the machine time to see and spray target weeds.

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