A new study may have found a better—and more humane—way to protect crops from rodents.
House mice may look cute, but they’re little monsters when it comes to crops. The rodents destroy 70 million tons of rice, wheat, and maize each year by devouring and infesting stored grain. They also dig up and eat the seeds farmers have planted.
It’s a “simple but elegant” solution, says Nils Christian Stenseth, a biologist at the University of Oslo and an expert of rodent impacts on crops who was not involved with the work. The approach, he says, could be applied to other crop pests such as insects and rats. Farmers in Australia have mainly tried to control the mice with poisons and pesticides, says Peter Banks, a biologist at the University of Sydney. But these chemicals have to be reapplied often, which gets expensive. They can also kill birds and other wildlife.protecting endangered birds
To try something similar for mice, Banks and his colleagues divided a wheat farm in rural New South Wales in Australia into 60 plots of 10 by 10 meters where wheat would be sown. The team sprayed unsown plots with wheat germ oil, hoping local mice would learn to associate wheat fields with a waste of their time and energy. In other fields, the team sprayed the soil with wheat germ oil after sowing, whereas other plots were left untreated.
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