Weed control is a problem as old as agriculture itself, but two projects from a Cornell AgriTech researcher aim to cultivate new methods for zapping the pesky plants, benefiting organic apple and grape growers and hemp producers in New York state and around the country.
Lynn Sosnoskie, assistant professor in the School of Integrative Plant Science, is collaborating on a $2 million project to study electric weed control in perennial fruit crops. She is also leading a $325,000 weed management study for hemp. Both studies are multi-institution, multistate undertakings that aim to provide growers with evidence-based, location-specific recommendations to suppress weeds and maximize yields.
Both projects began in September, will run for three years and are funded by the USDA’s National Institute for Food and Agriculture.
For the apple and grape study, Sosnoskie and collaborators at Oregon State University and the University of California-Davis, will test the performance, safety and economic and environmental sustainability of electric weed control in organic production. The organic product market topped $60 billion in 2020, and the largest market segment is fresh fruit.
Due to the nature of apple, grape and other perennial fruit plantings, crop rotation and intensive soil disturbance are not viable strategies for weed control. Organic herbicides and mulches can be expensive. Those factors led Sosnoskie and her colleagues to consider a novel weed control tool: electricity. The devices they will be testing essentially electrocute weeds by sending a jolt of electricity through the plant, damaging the plant’s cells and chlorophyll.
