Will 'Energy Crops' Become the Next Kudzu?

U.S. policies are subsidizing new energy crops that are likely to spread off the farm and wreak economic and ecological havoc, a federal advisory board cautioned yesterday.

For years, researchers have worked to develop “advanced” biofuel feeds from unconventional crops such as grasses and algae.
The goal is to enable a switch away from corn- and soy-based biofuel to cellulosic energy crops that don’t compete on the food or feed market and have a smaller carbon footprint. A 2007 energy law, in fact, requires a total of 160 billion gallons of the plant-based cellulosic fuels by 2022 that these crops would produce.

As a result, researchers are now selecting, breeding and engineering species that demand less water, fertilizer and agricultural land and grow year-round at high yields.

But it is often exactly these traits, such as drought tolerance or pathogen resistance, that make the fuels of the future ripe to become invasive species and cause widespread damage. The issue highlights another potential complication in what has been a bumpy road in the development of the biofuels industry.

“Absent strategic mitigation efforts, there is substantial risk that some biofuel crops will escape cultivation and cause socio-economic and/or ecological harm,” the white paper, adopted by the Invasive Species Advisory Committee, warns.

Every year, invasive plants cost the United States a minimum of $34 billion in losses and control costs, according to one study the group’s paper cites. The potential scale of biofuel cultivation, at more than 150 million acres, provides ample opportunity to add to those costs, the committee says.

Some proposed biofuel crops already are invasive species.

The issue goes beyond U.S. borders. The International U-nion for Conservation of Nature is also drafting guidelines on biofuels and invasive species. In Africa, it says, many governments are rushing to encourage biofuels development. But there, especially in countries lacking the resources to manage the risk of invasion, the threat has received scant attention, the group says.

New York Times