SALEM — The Oregon Liquor Control Commission issued its first recall of recreational marijuana after testing of a brand sold at a Mapleton, Ore., store showed it contained a level of pesticide residue that exceeds the state limit.

The OLCC , which oversees retail sales of recreational cannabis, said samples of Blue Magoo marijuana failed a test for pyrethin levels. Pyrethins are a mixture of six chemicals that are toxic to insects, according to the National Pesticide Information Center based at Oregon State University. Pyrethins are found in some chrysanthemum flowers, and in some cases can be used on organic products.