(PD) - As he went around Napa Valley in the past two years, Ken Giles had the unenviable task of notifying nearby residents that UC Davis would be conducting a demonstration project using drones to spray pesticides at its vineyard in Oakville.

Giles, a professor in the university’s biological and agricultural engineering department, said he was prepared for questions, especially given the civil rights qualms over military and police use of drones.

“I would go out and say, ‘I’m here to talk on drones spraying pesticides.’ If I was spraying over GMO crops, then I would have been three for three (on paranoia),” Giles wryly noted, referencing concerns over genetically modified organisms.

But Giles said he has not experienced much uproar over the program with partner Yamaha Motor Corp. USA, which has used its RMAX helicopter to test the efficiency and safety of aerial spraying over the Oakville vineyard. “It seems to be quieted down a bit,” he said.

The drones are expected to be more commonplace in the Napa vineyard, likely by next year if the Federal Aviation Administration approves Yamaha’s application to use unmanned aircraft systems for agricultural purposes.

Such approval appears increasingly likely as the FAA on Sept. 25 authorized six aerial photo and video production companies to use drones in the film and television industry.

“We feel the timing is right to investigate the U.S. market. We have been doing it the last couple years,” said Steve Markofski, business planner for Yamaha. “We have been focusing on high-value crops, specifically grapes here in Napa.”

Yamaha and UC Davis conducted a demonstration of the RMAX helicopter on Wednesday in conjunction with the Association for Unmanned Vehicle Systems International, a trade group which supports the defense, civil and commercial sectors. The aircraft, a small helicopter that weighs 140 pounds, carried water in its 2.1-gallon tanks, instead of pesticide.