Artichoke mosaic

Artichoke mosaic is a viral disease caused by the Artichoke mosaic virus (ArMV), which significantly impacts the cultivation of Cynara cardunculus. The virus interferes with the plant's physiological functions, specifically disrupting photosynthetic efficiency and protein synthesis, which ultimately leads to reduced yields and inferior produce quality.

The disease primarily targets artichokes, although it possesses a host range that may include other Asteraceae species. Understanding the host range is critical for integrated pest management, as wild relatives can act as reservoirs for the virus, ensuring its survival even when commercial artichoke fields are fallow.

Symptoms typically manifest as a mosaic pattern of light and dark green areas on the leaves. In more severe cases, plants exhibit stunted growth, leaf distortion, and shortened internodes. The floral heads, which are the primary economic part of the plant, may become malformed, smaller in size, and less dense, significantly lowering their market value.

The virus is primarily transmitted by aphid vectors (such as Aphis fabae) in a non-persistent manner. This means that aphids can acquire and transmit the virus very quickly after feeding on an infected plant. Furthermore, vegetative propagation using infected rootstocks or divisions is a major pathway for long-distance spread of the disease.

Effective control strategies focus on prevention rather than cure. Essential practices include sourcing virus-free planting material derived from meristem culture, implementing strict weed control to eliminate alternative hosts, and utilizing chemical or biological control methods to suppress aphid populations. Prompt rogueing of symptomatic plants is vital to minimize the secondary spread within the field.