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Jujube > Crown gall
Why Do Jujube Trees Suffer From Crown Gall?
Jujube, also known as Red date, Common jujuba
Crown gall is a bacterial disease that affects the roots and stems of Jujube. It induces the formation of tumour-like growths, inhibiting nutrient uptake and potentially leading to the death of the plant.

Symptom Analysis

On Jujube, symptoms include the appearance of rough, irregular galls or tumours, primarily at the base of the stem, around the crown region, and on the roots. The plant's vigour and fruit production typically decrease.
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What Causes Crown gall Disease on Jujube?

Agrobacterium tumefaciens
The pathogen infects Jujube via its DNA, transforming host cells into tumour-forming tissues.
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How to Treat Crown gall Disease on Jujube?

Non pesticide
Surgical removal: Remove minor galls surgically from healthy tissue and disinfect wound to prevent reinfection.

Promote good plant health: Maintain robust plant health to increase resistance against the disease.
Pesticide
Application of bactericides: Apply bactericides such as copper-based sprays to reduce pathogen populations.

How to Prevent Crown gall on Jujube?

Sterilize equipment
Ensure gardening tools are sterilized to ward off cross-contamination.
Proper irrigation
Avoid over-watering, and ensure proper drainage to prevent an ideal environment for bacterial growth.
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When is Crown gall Most Active Period on Jujube?

The bacterium is most active in warm, wet conditions, as this environment fosters the rapid division and spread of bacteria.

Infectivity

The disease is highly infectious and easily transmitted through soil and contaminated tools.

Lethality

Depending on the severity of the infection, it can be lethal for Jujube, particularly in vulnerable or weakened plants.

FAQs on Jujube

What are the visible signs of crown gall on Jujube?
The disease causes the formation of rough, tumour-like galls primarily around the crown region and on the roots of Jujube, often reducing the plant's health and productivity.
Can affected Jujube plants be cured?
Yes, small galls can be surgically removed, following which measures should be taken to boost the plant's overall health and resistivity against the disease.
How is crown gall transmitted to Jujube plants?
The disease is caused by Agrobacterium tumefaciens, which can be transmitted through soil and gardening tools, and enters the plant through wounds.
What are the preventive measures for crown gall in Jujube?
Apart from maintaining overall plant health, ensuring proper watering and drainage, and sterilizing gardening tools are key preventive measures.
How lethal is crown gall disease to Jujube?
The disease can be moderately lethal to Jujube, particularly in the case of severe infection or weakened plants.
Can crown gall disease be controlled with pesticides?
Yes, the application of appropriate bactericides can aid in controlling the disease, although a combination of treatments is likely to be most effective.
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