Tatumella citrea

This pathogen was originally identified as an agent causing specific damage to fruits, particularly in citrus crops. The bacterium is capable of rapid multiplication within the intercellular spaces of host plant tissues.

Biological features of Tatumella citrea include the production of enzymes that degrade cell walls, facilitating the invasion and colonization of host plant tissues.

The microorganism is transmitted through contact with contaminated planting material, insect vectors, and water droplets carried by wind or irrigation systems.

Unlike some other phytopathogenic bacteria, this species demonstrates high resilience to certain environmental stresses, allowing it to survive in crop residues.

The primary external manifestation of Tatumella citrea infection is the development of necrotic spots on the fruit surface. Initial symptoms appear as small chlorotic dots that eventually darken.

As the disease progresses, these spots enlarge and may become sunken, indicating the collapse of tissue under the epidermis of the fruit.

During the advancement of the pathological process, bacterial exudate—mucus containing colonies of the microorganism—may appear on the surface of the lesions.

Internal fruit tissues under the infection site often undergo softening and necrosis, rendering the produce unsuitable for marketing or long-term storage.

• necrotic spotting on the peel;
• development of sunken lesions;
• exudation of bacterial slime;
• premature fruit drop.

The development of the bacteria is directly dependent on air humidity levels and ambient temperatures. The optimal conditions for colonization range between 20 and 28 degrees Celsius.

High humidity, caused by prolonged rainfall, fog, or improper overhead irrigation, significantly accelerates the spread of the pathogen within agroecosystems.

The presence of micro-cracks, insect damage, or mechanical injuries on the fruit peel serves as an entry point for infection, drastically increasing the risk of orchard colonization.

Water accumulation on the surface of leaves and fruit provides an ideal environment for bacterial motility, allowing them to reach and penetrate natural openings like stomata.

Poor agricultural practices, such as excessive planting density, hinder ventilation, leading to moisture stagnation and the formation of disease hotspots.

The primary damage caused by Tatumella citrea is the direct loss of market value for fruit produce. Affected fruits lose their visual appeal and decay rapidly.

This leads to significant economic losses, as contaminated batches are often discarded due to their inability to withstand transportation or storage requirements.

Damaged fruits frequently become secondary targets for fungal pathogens, which trigger rapid soft rot and total crop failure in storage facilities.

On a commercial scale, this bacteriosis can reduce overall yield by 20–40% if effective management strategies are not implemented in time.

The presence of infection symptoms on fruit creates quarantine risks, potentially leading to export bans for entire agricultural production regions.

Disease prevention starts with the careful selection of healthy planting material and the use of certified, disease-free nursery stock.

An effective control strategy involves regular applications of copper-based bactericides, which restrict bacterial population growth on the plant surface.

Managing insect pest populations is critical, as they act as mechanical vectors and cause the physical damage that allows bacteria to enter the fruit.

Maintaining optimal agricultural practices, including pruning to improve canopy aeration and removing plant debris, is essential for successful disease suppression.

Upon detection of infection sites, affected fruits must be immediately removed and disposed of to prevent the further spread of the pathogen throughout the orchard or greenhouse.