BOULDER, CO -- The Colorado Department of Revenue on Wednesday issued its second recall in two weeks for products from a Boulder-based marijuana grower due to unsafe pesticide residue on the plants. According to the Colorado Department of Agriculture, marijuana cultivated by Crossroads Wellness LLC, operating as Boulder Botanicals, showed residue of non-approved pesticides Bifenthren and Diuron. Colorado's departments of Public Health and Environment consider the presence of such off-brand pesticides a public health risk.

Bifenthren is an insecticide that interferes with an insect's nervous system. Diuron is an herbicide typically used to inhibit photosynthesis on broadleaf and grassy weeds. Both are considered possible carcinogens by the Environmental Protection Agency. The recall recommends that consumers who have any marijuana flower, trim, concentrates, and infused products from the contaminated strains should return them to the medical center from which they were purchased so they can be properly disposed of.

The marijuana container label will indicate the license number of the cultivator. The following numbers are a part of the recall:

On Nov. 21, a similar recall was issued for marijuana grown by Colorado Wellness Centers LLC, operating as Lush, due to Pyriproxyfen residue. Pyriproxyfen is an insecticide that mimics a natural hormone in insects and disrupts their growth, according to the National Pesticide Information Center. Research by the Environmental Protection Agency in 2014 found that Pyriproxyfen is a potential endocrine disruptor in the androgen and thyroid pathways.

The following strains are affected by the Nov. 21 recall: Do you like this article? Join the Boulder Patch on Facebook! Stay in touch with the news and events that shape Boulder County. Sign up for your free Patch newsletter here.