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Authors
George Stack, Jacob Toth, Craig Carlson, Mariana Marrero Gonzàlez, Rebecca Wilk, Jamie Crawford, Ali Cala, Glenn Philippe, Jocelyn Rose, Don Viands, Chris Smart, Larry Smart
Production of cannabinoids
Cannabidiol (CBD) is becoming very popular as a supplement for relief of seizures, pain, and anxiety. It is made in specialized leaf hairs on female floral tissue.
Locations and production methods
We are testing cultivars in two small-plot trials on Cornell research farms in Geneva and Ithaca. Plants were established from seeds or cuttings in 50-cell flats in early May. Females were transplanted to raised beds with plastic mulch and drip irrigation on June 5 (Geneva) and June 7 (Ithaca).
Plant trait measurement
We are measuring several plant traits throughout the growing season including plant height, time to flowering, flowering form, pest and disease incidence, chlorophyll content, and leaf area. We saw variability within and between cultivars for flowering time and form. The ‘Kayagene’ varieties were flowering when we planted them and most ‘First Light’ varieties haven’t flowered yet.
Harvest yield and quality assessment
We will harvest whole plants and air dry them to measure dry biomass. Cannabinoids will be measured from floral tissue to determine regulatory levels (top 10 cm) and whole plant yields.
Cultivars/lines in our 2019 trials
| Cultivar/Line | Source | Cutting or Seed | Germ. | % Female |
| AC/DC | Winterfox Farms, Eagle Point, OR | Seed (Dioecious) | 97% | 49% |
| Otto II | Winterfox Farms, Eagle Point, OR | Seed (Dioecious) | 93% | 48% |
| Nebraska Feral | Winterfox Farms, Eagle Point, OR | Seed (Dioecious) | 46% | 50% |
| A2R4 | Winterfox Farms, Eagle Point, OR | Seed (Dioecious) | 68% | 52% |
| RNF | JDMI Limited, Talent, OR | Seed (Dioecious) | 85% | 53% |
| RN13a | Go Farm Hemp, OR | Seed (Dioecious) | 73% | 40% |
| RN16 | Go Farm Hemp, OR | Seed (Dioecious) | 98% | 51% |
| RN17 | Go Farm Hemp, OR | Seed (Dioecious) | 97% | 59% |
| RN19 | Go Farm Hemp, OR | Seed (Dioecious) | 97% | 55% |
| Brilliance | Green Lynx Farms, CO | Seed (Feminized) | 90% | |
| KG9201 | Kayagene, CA | Seed (Feminized) | >90% | |
| KG9202 | Kayagene, CA | Seed (Feminized) | >90% | |
| T2 | Boring Hemp, CO | Seed (Feminized) | 100% | |
| TJ’s CBD | Stem Holdings, OR | Cutting | ||
| Tangerine | NY Hemp Source, NY | Cutting | ||
| Late Sue | NY Hemp Source, NY | Cutting | ||
| Deschutes F1 | Industrial Seed Innovations, OR | Seed (Feminized) | 96% | |
| Umpqua F1 | Industrial Seed Innovations, OR | Seed (Feminized) | 94% | |
| Rogue F1 | Industrial Seed Innovations, OR | Seed (Feminized) | 100% | |
| First Light 49 | Sunrise Genetics, CO | Cutting | ||
| First Light 58 | Sunrise Genetics, CO | Cutting | ||
| First Light 70 | Sunrise Genetics, CO | Cutting | ||
| First Light 71 | Sunrise Genetics, CO | Cutting | ||
| First Light 80 | Sunrise Genetics, CO | Cutting | ||
| First Light 70×70 | Sunrise Genetics, CO | Seed (Feminized) | 62% | |
| First Light 71×71 | Sunrise Genetics, CO | Seed (Feminized) | 96% | |
| Cherry 5 | HempLogic, WA | Seed (Dioecious) | 83% | 46% |
| Cherry 307 | HempLogic, WA | Seed (Dioecious) | 45% | 52% |
| Cherry 308 | HempLogic, WA | Seed (Dioecious) | 88% | 42% |
| NY Cherry | Genesis Hemp Alliance, NY | Seed (Dioecious) | 69% | 34% |