Virus Screening

Virus screening is a laboratory classification practice used to identify and document the presence of plant viruses in cannabis genetics. Common viruses of concern in cannabis cultivation include Tobacco mosaic virus (TMV), Cucumber mosaic virus (CMV), and various plant pathogens that can reduce vigor or yield. Screening protocols typically employ PCR testing, serological assays, or next-generation sequencing to detect viral material in plant tissue samples. Breeders and seed producers use virus screening to establish pathogen-free status before release, helping preserve genetic lines and support downstream grower success. This classification is increasingly standard in commercial seed libraries and breeding programs focused on genetic stability and health documentation.

Virus screening data helps breeders establish clean baseline genetics, prevent contamination during crosses, and create pathogen-free mother plant libraries. Documented virus-negative status is also used as a quality marker when licensing or selling seeds to commercial operations.