What is HLVd?

What is HLVd? Hop Latent Viroid (HLVd) is a small, circular RNA virus that has become a growing concern for cannabis cultivators in recent years. HLVd is a pathogen that infects cannabis plants and can cause significant damage to crop yield and quality. In this article, we will explore the impact of HLVd in cannabis, how it spreads, and how to minimize the risk of infection.

Where did HLVd come from?

The origin of Hop Latent Viroid (HLVd) is not entirely clear, but it is believed to have originated in hop plants. HLVd was first discovered in hop plants in 1976 and was initially thought to be specific to hops. However, it was later found that HLVd could infect other plant species, including cannabis.

It is believed that HLVd may have been transmitted from hops to cannabis through the use of infected plant material or seeds. As cannabis and hops are both members of the Cannabaceae family, they share certain genetic similarities that may have facilitated the transmission of the virus.

Additionally, it is possible that HLVd may have originated in a different plant species and then transmitted to hops and cannabis. The exact origin of HLVd remains uncertain, but ongoing research aims to better understand the evolution and transmission of this virus.

Impact of HLVd on Cannabis

HLVd is a pathogen that causes stunted growth and reduced yields in cannabis plants. The virus can infect both male and female cannabis plants, affecting the overall quality of the crop. HLVd is known to cause the curling and twisting of leaves, which results in a reduction in the surface area for photosynthesis. This leads to a decrease in the plant’s ability to produce energy, which results in reduced growth and yield.

Additionally, HLVd can cause other symptoms such as chlorosis, yellowing of leaves, and necrosis. The virus also weakens the plant’s immune system, making it more susceptible to other pathogens, such as powdery mildew and botrytis. HLVd can significantly impact cannabis production, resulting in economic losses for cultivators.

Spread of HLVd in Cannabis

HLVd can be spread through infected seeds or plant material, making it difficult to detect and control. The virus can also spread through mechanical means, such as contaminated tools or equipment. The virus can also spread through contaminated water or by insects, such as thrips and spider mites. HLVd is highly infectious and can spread rapidly, making it crucial to prevent its spread.

Minimizing the Risk of HLVd Infection

To minimize the risk of HLVd infection, it is essential to follow strict sanitation protocols in cannabis cultivation facilities. Sanitation protocols should include frequent cleaning and disinfection of all equipment and tools used in the cultivation process. Additionally, all plant material should be screened for HLVd before being introduced to the cultivation facility.

To prevent the spread of HLVd through contaminated water, cultivators should use clean, filtered water and ensure that their irrigation systems are properly cleaned and maintained. It is also crucial to prevent the introduction of HLVd through insect vectors by implementing an integrated pest management system and controlling insect populations.


HLVd is a serious threat to cannabis cultivators, causing significant damage to crop yield and quality. The virus can spread rapidly and is highly infectious, making it crucial for cultivators to implement strict sanitation protocols and preventative measures. By following these measures, cultivators can minimize the risk of HLVd infection and ensure the health and productivity of their cannabis crops.

Authour :

Paul Fish

Paul Fish