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. [Read more at The Cannabist at The Denver Post]