Citrus tatter leaf virus

The causal agent of this disease is the Citrus tatter leaf virus (CTLV), which is classified under the genus Capillovirus. This pathogen induces systemic infection in host plants, leading to severe morphological changes and physiological stress that inhibits the normal development of citrus trees.

The virus primarily affects various species within the Citrus genus. It is particularly noted for its damaging effects when sensitive scion varieties are grafted onto citrange rootstocks, as the physiological incompatibility triggered by the virus causes rapid stunted growth and structural decline of the tree.

Key symptoms include characteristic tattering or ragged edges on the leaves, along with vein yellowing and erratic chlorotic patterning. Furthermore, affected trees often exhibit distinct stunting, reduced fruit yield, and, in severe cases, the formation of necrotic lesions at the graft union, leading to tree death.

The primary route of spread is through infected propagation material, such as budwood and scions used in commercial grafting. Additionally, the virus is easily transmissible via contaminated pruning tools and horticultural equipment, making sanitation an essential part of disease management protocols.

There are no known chemical cures for citrus viral infections, which makes prevention the only effective strategy. Growers must prioritize the use of certified virus-free rootstocks and scions, implement rigorous quarantine measures, and strictly sanitize all pruning tools between trees to prevent the mechanical transmission of the virus within the orchard.