Colorado adds to list of approved pesticides for cannabis growers

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Colorado regulators are allowing four more pesticides to be used in cannabis cultivation.

The state Department of Agriculture sent out an updated list of approved pesticides that now includes:

  • PFR-97 10% ES
  • Long Shadow
  • Rootshield WP
  • Spear-LEP

All four can now be used without violating the Pesticide Applicators’ Act.

According to a news release, the agriculture department evaluates pesticide labels upon request and maintains a list of products whose labels have been reviewed.

Such products may be used on marijuana without violating state regulations as long as growers heed the label directions.

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The state may remove pesticide products from the approved list if registrants fail to renew a pesticide product with the ag department.

According to the state, the use of unregistered pesticides on cannabis would be a violation of the Pesticide Applicators’ Act.

Growers with questions regarding this change may contact Jolynn Morris at (303) 869-9060 or