A leaffooted bug munches on hemp (Photo courtesy Ric Bessin, University of Kentucky) Accessing pesticides that can be used for hemp is one of... 4 considerations before choosing pesticides for hemp production

A leaffooted bug munches on hemp (Photo courtesy Ric Bessin, University of Kentucky)

Accessing pesticides that can be used for hemp is one of the more challenging aspects of growing the crop – and that’s not likely to change soon.

As new hemp states across the country rolled out their cultivation programs in the spring, growers quickly found that there’s a scarcity of crop protection options, and uncertainty about whether the federal government is going to regulate hemp as a food additive or a drug is slowing the process for registering new pesticides that can be used on the long-prohibited crop.

Several agricultural chemical companies wait for guidance from the U.S. Food and Drug Administration, because its decision on whether to regulate CBD as a drug or food additive could determine what pesticides they pursue.

Meanwhile, one company has chosen to pursue pesticide labels only for hemp grown for fiber, not food uses, according to Ric Bessin, professor of entomology at the University of Kentucky.

The IR-4 Project, the primary organization in the U.S. that facilitates the registration of pesticides and biopesticides in food crops, is currently conducting two test trials for a herbicide and a fungicide for hemp, Bessin said. But getting a pesticide registered can take about 3 or 4 years, Bessin said during a recent conference about hemp production sponsored by the university.

Last year, the U.S. Environmental Protection Agency approved 10 pesticides for use on hemp, and the agency has reviewed additional applications over the past year.

Approving pesticides for hemp production was made possible by the legalization of the crop under the 2018 Farm Bill, which removed hemp and its derivatives from the Controlled Substances Act.

Most of the pesticides currently labeled for hemp are biopesticides listed with the Organic Materials Review Institute, meaning they can be used on organic crops. Biopesticides take less time to receive approval from the EPA than conventional, chemical pesticides.

Be educated

So what can pesticides can growers use to protect their hemp crops? And what should growers consider before deciding whether to use a pesticide?  Bessin laid out four considerations growers should take into account:

  • Very few pesticides specifically list hemp, so look for “minimum risk” pesticides, labeled as 25b pesticides in the Federal Insecticide, Fungicide and Rodenticide Act (FIFRA) that governs them. The act was enacted in 1947 to protect farmers by requiring pesticides to work as advertised and to use accurate labels. These pesticides don’t need to be registered with the EPA but may be registered by states, so growers should be sure to check with the appropriate agency.
  • Growers should know how their states interpret pesticide regulations. States have different interpretations of what’s allowed, meaning some may permit pesticides that others do not. “When it comes to the ultimate authority where you grow hemp, you need to talk with your department of agriculture or whoever it is in your lead state agency responsible for establishing what is permissible,” Bessin advises.
  • Think about the buyer and end consumer: Do they approve of hemp produced with pesticides? Consumers are increasingly demanding sustainably and organically produced crops. 
  • Pay attention to what’s on the label. “The label is the law when it comes to pesticides,” Bessin said. “The first sentence under the directions for use with every pesticide label is, ‘It’s a violation of federal law to use this product inconsistent with its labeling.’”

Ivan Moreno can be reached at [email protected]

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