Viroid Testing

VIROID Testing

Early detection of cannabis viruses can increase yield by up to 30%

Merso Labs can simultaneously test for three common viruses that reduce yield and potency, using a multiplexed quantitative PCR assay. Infected Plants can have 50% less cannabinoid content compared to healthy plants. These viruses are: Hop Latent Viroid (HLV) Lettuce Chlorosis Virus (LCV) and Cannabis Cryptic Virus (CCV).

Hop Latent Viroid (HLV) is an infectious pathogen that is commonly spread through infected pruning tools. Often it is passed to other plants during the cloning process. Symptoms are hard to identify but can include stunted growth and reduced trichomes. HLV is problematic because it may be dormant in plants for some time yet still spread throughout the crop. We can test to determine if HLV is present in your field and then recommend next steps. 

Lettuce Chlorosis Virus (LCV) The leaves of plants infected with lettuce chlorosis virus show signs of yellowing, rolling leaves, brittleness, and other characteristics of nutrition deprivation. These symptoms may appear later in the flowering phase, resulting in stunted growth. The later stage in the appearance of symptoms makes it hard to identify the infected mother plant.

Cannabis Cryptic Virus (CCV) A sign of CCV can include streaks in the plant however this cryptic, or symptomless, virus is hard to detect. Like the other viruses, CCV can impact yield and potency.  It can also be transmitted through seeds so breeders need to be aware of its presence and screen early.