Which of the following is NOT considered a disease reservoir for Cherry X-disease?

Cherry X-disease is primarily associated with the viral agents that affect cherry trees and certain related plants. In the context of this disease, a disease reservoir is a host that can maintain and perpetuate the pathogen, allowing it to infect new hosts.

Dandelion, crabapple, and clovers are all known to be reservoirs for the virus that causes Cherry X-disease, as they can harbor the pathogen and contribute to its spread within the environment. For instance, crabapple species are particularly relevant because they are closely related to cherries and can act as a source of infection. Dandelions and clovers, while not directly linked to cherry trees, have been implicated in various studies as potential hosts that facilitate the survival of the virus.

On the other hand, beech trees are not recognized as reservoirs for Cherry X-disease. They do not play a role in the lifecycle of the pathogens associated with this particular disease, making them an unsuitable host for sustaining the virus. Thus, identifying beech as not being a disease reservoir for Cherry X-disease is accurate, as it does not contribute to the propagation of the virus or its spread to cherry plants.