The Emerald Cup has brought an audience of tens of thousands to the Sonoma County fairgrounds each of the last four years, and the contest’s environmental focus sets it apart from other cannabis competitions.
But this year, pesticides upended many of the winners of the three-day marijuana festival in December known for its focus on organic and sustainable outdoor farming.
About 25 percent of 263 samples in the concentrates categories submitted from producers across the state were disqualified, mostly because they tested positive for pesticides, according to the event’s official laboratory, Santa Cruz-based SC Labs.
The issue wasn’t uncovered until after the Dec. 11-13 contest due to a late crush of entries plus internal miscommunication about deadlines, said Emerald Cup founder Tim Blake. Blake said he was troubled by the discovery and has apologized to contestants.
“We were dumbfounded that we’d see this (pesticide use) at that level,” Blake said. “We’re going to have to be very careful about that in the future.”
Just over 5 percent of cannabis flower samples showed evidence of pesticides — 40 out of 735 samples entered into the contest — according to Alec Dixon, a co-founder of SC Labs, which got its start in 2010 as the official testing laboratory for the Emerald Cup.
Pesticides were far more prevalent among concentrates, which includes several categories, such as CO2, rosin and dry sieve.
The disqualifications bumped up a concentrate by Sonoma County’s Cult Classics Seeds from No. 3 to No. 1 in the dry sieve category — named for the sifting process that separates resin glands from the rest of the plant. That sample was entered by a Sebastopol man who goes by the name Marcus Walker, a breeder of marijuana strains best suited for concentrates. Walker said the contest organizers failed to list his product — called Xenu (Hippy Slayer x R6) — in the No. 3 spot until the two disqualifications boosted him to No. 1.
“They kind of shafted me pretty hard,” Walker said, lamenting the initial lack of recognition his entry received when results were first announced. “For me it’s upsetting; you put so much into doing something.”
Dixon said it’s logical that concentrating what’s in the plant would also concentrate anything else, making it more likely chemicals would be detected.
“Concentrates are where it all comes to life,” Dixon said. “It’s where total truth comes out because you’re also concentrating whatever pesticides are there.”
The Emerald Cup began testing for pesticides last year — and is widely believed to have been the first cannabis contest to do so.
In 2015, Blake vowed from the event stage to publish the names of products caught with evidence of pesticide use. Blake said his aim was not to humiliate people but push for transparency and a cleaner industry. All tests results were published online the day of the event.
Dixon said other events followed the Emerald Cup’s lead, including two San Bernardino County festivals: Chalice California held in July and the Happy Place held around New Year’s Eve.
“It’s had an incredible impact on this vulnerability in this business,” Dixon said. “Up to this point it’s only the most progressive companies that have done pesticide testing — because they haven’t had to.”