(David Zalubowski, Associated Press file)

Colorado just recalled more marijuana because of illegally used pesticides

State's 10th, 11th marijuana recalls in less than a month cover pot grown by RR Services and Advanced Medical Alternatives

Colorado cannabis regulators on Monday recalled medical and recreational marijuana grown by two cannabis businesses — RR Services and Advanced Medical Alternatives — over concerns the plants were grown with unapproved pesticides.

The recalls, called health advisories by the state, are the tenth and eleventh holds announced by the Colorado Marijuana Enforcement Division in less than one month.

The advisories note that 42 batches of RR Services’ marijuana and 10 batches of Advanced Medical Alternatives’ cannabis each tested positive for myclobutanil, a fungicide considered “slightly hazardous” by the World Health Organization and a “Bad Actor” by the Pesticide Action Network.

Consumers who have any of the recalled retail pot products should return it to the place of purchase to ensure it is disposed of properly, the state said.

Before the state of Colorado began recalling pot products last month, the city of Denver issued 20 city-level recalls of marijuana products between September 2015 and February 2016. Advanced Medical Solutions was the subject of two city-level recalls on Dec. 3 and Dec. 11; It’s not yet clear if the state’s recall of AMA product is a continuation of the city’s investigations. A representative with the Colorado Department of Agriculture told The Cannabist, “The complainant information for each case is considered confidential until the investigation is complete.”

It is unclear how large the recalls are or how many actual products or plants are affected. Product labels will contain the businesses’ recreational license numbers; The specific list of strains can be found on the state’s website — for RR Services and Advanced Medical Alternatives.

Gov. John Hickenlooper in November declared that any marijuana grown with unapproved pesticides is a public health risk and should be destroyed.