Knowledge Tree
Relations (1)
related 4.81 — strongly supporting 27 facts
Hemp and THC are related because hemp is legally defined by its THC concentration, specifically requiring levels below 0.3% to remain legal as established in [1] and [2]. Furthermore, hemp cultivation is subject to strict regulatory testing for THC [3], [4], and [5], with crops often requiring destruction if they exceed these limits [6], [7], and [8].
Facts (27)
Sources
Industry-Based Misconceptions Regarding Cross-Pollination of ... frontiersin.org 18 facts
claimA common misconception among hemp growers is that cross-pollination of marijuana pollen onto female hemp plants immediately increases the THC concentration in the current hemp crop.
referenceAbiotic and biotic stressors are the most likely cause of high THC instances in hemp, according to Hakim et al. (1986).
claimCannabis spp. is classified into two categories: marijuana, which is high in Δ9-tetrahydrocannabinol (THC), and hemp, which contains less than 0.3% THC.
claimOutdoor hemp clones can become pollinated and exceed allowable THC limits, despite being genetically identical to the mother plant.
perspectiveA common misconception in the cannabis industry is that cross-pollination from high-THC marijuana plants causes hemp crops to become 'hot' (high in THC) and therefore illegal.
accountIn Oregon, a hemp farm was required to destroy its crop of female plants due to high THC levels attributed to cross-pollination from a neighboring marijuana cultivation containing male plants.
accountA hemp grower in Yuma, Colorado, was forced to destroy an entire field of hemp after the plants experienced a 3.17% spike in THC levels.
claimIf a hemp crop exceeds 0.3% Δ9-tetrahydrocannabinol (THC) concentration, the plant materials must be disposed of, resulting in the loss of the grower's economic investment.
measurementMarijuana pollen grains contain Δ9-tetrahydrocannabinolic acid (THCA) at a concentration of 0.16 g%, which is below the 0.3% THC limit for hemp.
referenceComplete genome sequencing on hemp and marijuana has identified the chromosomal location of the THCA synthase gene, which catalyzes the formation of THCA from CBGA, and has identified evolutionary events causing copy number variation in THCA genes.
claimHigh THC levels in a hemp field can be caused by environmental stressors (such as light spectrums and water deficit), the use of highly heterozygous seeds containing high THC alleles, or the use of seeds resulting from hemp cross-pollinated with marijuana.
referenceDeventer M. V. (2018) authored an article titled 'Hot hemp: how high THC levels can ruin a legal hemp harvest', which examines the implications of high THC levels for legal hemp cultivation.
procedureThe USDA final rule requires that hemp crops be tested for Δ9-tetrahydrocannabinol (THC) concentration within 30 days prior to the anticipated harvest.
claimHemp THC levels can exceed 0.3% upon receiving external and internal cues, even if initial testing certifies the variety produces less than 0.3% THC.
claimThe 2018 Farm Bill established the legal definition of hemp as cannabis with a Δ9-tetrahydrocannabinol (THC) concentration of less than 0.3%.
claimHemp varieties are designed for high CBD production while maintaining THC levels below 0.3%.
claimFew hemp varieties have reached the state of being genetically homozygous, which correlates with near-zero percent THC attributions in their genetics.
claimHemp cultivation exceeding legal THC limits is caused by cross-pollination only if the seeds used were the result of cross-pollination.
A critical review of industrial fiber hemp anatomy, agronomic ... bioresources.cnr.ncsu.edu 5 facts
procedureIf harvested hemp exceeds the 0.3% THC threshold, the relevant Department of Agriculture advises the producer on proper disposal techniques.
accountIn 2019, many U.S. hemp growers were forced to destroy their crops after the plants exceeded the legal THC limit of 0.3%.
claimCultivars of hemp with extremely low concentrations of the psychoactive compound THC have been legal in the United Kingdom, Austria, Switzerland, and Germany since the 1990s.
claimEarly harvesting is recommended to avoid excessive total THC levels in hemp.
procedureHemp growers must report total THC levels at least 15 days prior to harvesting to ensure that the total THC is lower than the 0.3% threshold, as determined by laboratory testing.
Hemp vs. marijuana: Cross-pollination concerns grow | Verisk verisk.com 3 facts
measurementPollination of female hemp or marijuana plants can result in a 56 percent reduction in oil production, specifically regarding CBD or THC content.
referenceThe USDA interim rules for hemp production address procedures for collecting data on hemp cultivation, testing THC levels, disposing of plants that exceed allowable THC levels, licensing requirements, and handling violations.
referenceThe USDA's 'Establishment of a Domestic Hemp Production Program' interim rules address procedures for collecting data on hemp production locations, testing THC levels, disposing of plants exceeding allowable THC levels, licensing requirements, and handling violations.
Industry-Based Misconceptions Regarding Cross-Pollination of ... researchgate.net 1 fact
claimThe belief that hemp becomes "hot" (high in THC) if it is cross-pollinated by high-THC cannabis is a misconception according to the paper 'Industry-Based Misconceptions Regarding Cross-Pollination of Cannabis spp'.