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Flowering dogwood > Crown gall
Why Do Flowering dogwood Trees Suffer From Crown Gall?
Flowering dogwood, also known as Flowering cornel
Crown gall is a plant disease that primarily affects the root and stem tissues of Flowering dogwood, causing abnormal growths or galls. The disease hinders the plant's nutrient transportation system, affecting its overall health and development.

Symptom Analysis

The main symptoms of crown gall on Flowering dogwood include the presence of irregular, round growths on roots and lower stems. The galls disrupt the transportation of nutrients, leading to yellow leaves, reduced growth, and eventual wilting.
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What Causes Crown gall Disease on Flowering dogwood?

Agrobacterium tumefaciens
Crown gall is caused by the soil-borne bacterium Agrobacterium tumefaciens, which enters the Flowering dogwood through a wound and transfers its DNA into the plant's cells, causing them to multiply and form galls.
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How to Treat Crown gall Disease on Flowering dogwood?

Non pesticide
Pruning: Prune off the galls as soon as they are detected, sterilizing the cutting implements between each cut to prevent further spread.

Nutrient management: Proper nutrient management can help the plants bolster their natural defense against the infection.
Pesticide
Use of bactericides: Applying bactericides on plant wounds can help control the bacterium. Always follow label instructions.

How to Prevent Crown gall on Flowering dogwood?

Proper sanitation
Regularly clean and sterilize gardening tools, and avoid working in wet, contaminated soil to prevent spreading the bacteria.
Healthy transplants
Always use disease-free transplants and try to avoid injuring Flowering dogwood as wounds provide entry points for the bacteria.
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When is Crown gall Most Active Period on Flowering dogwood?

Crown gall is most active during wet, cool conditions, particularly in spring and fall. During these times, Flowering dogwood is more vulnerable to wounding, allowing the bacterium an opportunity to invade.

Infectivity

The bacterium is highly infectious and can easily spread from plant to plant through soil, water, and gardening tools.

Lethality

While not always lethal, the disease can severely weaken Flowering dogwood, making it susceptible to other pathogens and environmental stressors.

FAQs on Flowering Dogwood

What does crown gall look like on Flowering dogwood?
Crown gall appears as irregular, round growths or swellings, usually on the roots and lower stems of the Flowering dogwood.
Can crown gall kill Flowering dogwood?
Crown gall is not typically lethal to Flowering dogwood. However, it weakens the plant, making it susceptible to other diseases and environmental stressors, which can lead to death.
How can crown gall be prevented in Flowering dogwood?
Crown gall can be prevented by maintaining good sanitation practices, reducing plant injury, and using disease-free transplants.
Is crown gall contagious to other plants?
Yes, crown gall is highly contagious. It spreads from plant to plant through contaminated soil, water, and gardening tools.
How is crown gall treated on Flowering dogwood?
Crown gall is typically treated by pruning off the galls, maintaining nutrient management, and applying bactericides.
When is Flowering dogwood most susceptible to crown gall?
Flowering dogwood is most susceptible to crown gall during wet, cool conditions, particularly in spring and fall, when the plant is vulnerable to wounding.
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