What type of organism causes Wheat Yellow Mosaic?

Wheat Yellow Mosaic is caused by a virus, which is the correct answer. Specifically, it is associated with the Wheat yellow mosaic virus (WYMV), among other viruses that can affect wheat crops. Viruses are unique pathogens that replicate within the host's cells, leading to various symptoms, including yellowing of the leaves, stunted growth, and other forms of plant stress.

In the case of Wheat Yellow Mosaic, the virus disrupts normal physiological processes in the wheat plant, resulting in characteristic mosaic patterns on the leaves and potentially affecting yield. The management of viral diseases like this often involves practices such as crop rotation, the use of resistant varieties, and controlling insect vectors that may transmit the virus.

Understanding that Wheat Yellow Mosaic is a viral disease highlights the need for specific pest management strategies tailored to combat viral pathogens, distinguishing them from bacterial, fungal, or parasitic infections, which have different characteristics and controls.