(Wines&Vines) - Professors at the University of California, Davis, recently demonstrated an unmanned helicopter that could have numerous vineyard uses including spraying liquid and granular pesticides, seeding cover crops and sensing and implementing precision agriculture. Professor of agricultural engineering Ken Giles and development engineer Ryan Billing demonstrated the Yamaha RMAX Type IIG aircraft at the university’s Oakville Experimental Vineyard in Napa Valley. The helicopter is in use in Australia but still in experimental stages here.