What are the primary reservoirs for Cherry X-disease?

Cherry X-disease is primarily associated with the presence of specific hosts known to harbor the pathogen responsible for the disease. In this case, clovers and sweet clovers serve as primary reservoirs. These plants can host the pathogen that affects cherry trees, allowing it to persist in the environment and potentially spread to other susceptible crops. The association between these clovers and the disease highlights the importance of these plants in the disease's epidemiology, acting as a source of inoculum for infecting cherry trees.

Other plant species listed, such as roses and daisies, maples and oaks, and pines and cedars, do not serve as reservoirs for the cherry X-disease pathogen. Their involvement in the disease cycle is minimal or non-existent, clearly indicating that clovers and sweet clovers are the critical hosts to consider when discussing the primary reservoirs for Cherry X-disease.