SALEM, Ore. (AP) — The Oregon Liquor Control Commission issued its first recall of recreational marijuana after samples of a type of pot were found to contain a level of pesticide residue above the state limit.

The Blue Magoo marijuana was sold at Buds 4 U in Mapleton, a community 45 miles west of Eugene, The Capital Press reported. The commission, which oversees retail sales of recreational pot, said people who bought the drug should return it to the retailer or throw it out.

The retailer notified the agency immediately after spotting the failed pesticide reading in the state’s cannabis tracking system, commission spokesman Mark Pettinger said. The shop sold the brand to 31 customers March 8-10.

Pettinger said a wholesaler shipped the pot to the Mapleton store before the test results were entered in the tracking system.

“The retailer was great,” he said. “They get the gold star.”

The Oregon Liquor Control Commission said the samples failed a test for pyrethrin levels. They are a mixture of six chemicals that are toxic to insects, according to the National Pesticide Information Center based at Oregon State University. [Read more at the Denver Post]