Jasmine yellow

Jasmine yellow is a severe infectious disease caused by phytoplasmas, which are specialized bacteria-like pathogens that reside in the plant's phloem. By colonizing the conductive tissues, these organisms disrupt the translocation of nutrients, leading to systemic decline of the affected plant.

The disease primarily impacts various Jasmine species (Jasminum spp.), leading to significant damage in both ornamental gardens and commercial nurseries. Since phytoplasmas are obligate parasites, they rely entirely on the host plant and insect vectors for their survival and dissemination.

Typical symptoms include distinct chlorosis of leaves, where the foliage turns yellow while veins may remain green. Affected plants often exhibit stunted growth, excessive proliferation of thin, twiggy shoots, and floral abnormalities, such as petal discoloration or failure to bloom completely.

The spread of Jasmine yellow is facilitated by sap-sucking insects, mainly leafhoppers, which acquire the pathogen from infected tissues. The incidence of the disease typically increases during warmer months when insect populations peak and move actively between host plants.

Management strategies focus on a combination of cultural and chemical controls.

• Prompt removal and destruction of symptomatic plants.
• Monitoring and control of leafhopper populations with insecticides.
• Maintaining plant vigor through balanced fertilization and irrigation.
• Using only certified disease-free nursery stock.