**3.3** *Citrus bentleaf viroid* **(CBLVd) or** *citrus viroid I*

This viroid belongs to Pospiviroidae family, *Apscaviroid* genus and it has 318 nucleotides. Its structure is rod-like. Because of the resemblance of a part of the

#### **Figure 5.**

*Severe symptoms of cachexia, including gumming and pitting of bark and wood (A) of declining Minneola tangelo orchard from Jiroft, Kerman Province (B) in comparison with mild symptoms of cachexia in the same variety from Mazandaran Province (C). Source: Banihashemian et al. [17].*

central conserved region (CCR) with the *apple scar skin viroid* (ASSVd), this viroid is located in this genus, although this viroid infected citrus cultivars. The left terminal region of *citrus bentleaf viroid* is as the same as *citrus exocortis viroid* (CEVd) [16]. The symptom of this disease is just on the leaves as curling.
