Gummosis

What Causes Peach Gummosis?

Peach gummosis is caused by a fungus called Botryosphaeria dothidea. The fungus enters the tree through wounds, such as those caused by insects, pruning, or natural openings called lenticels. The fungus overwinters in infected wood and debris on the ground, and its spores can be spread to healthy trees by rain, wind, or irrigation.

Symptoms of Peach Gummosis

The earliest signs of peach gummosis are small, resin-oozing spots on new bark, usually around the tree’s lenticels. Over time, the fungus kills tree tissue, resulting in sunken areas. Older infection sites become very gummy and may merge together to form larger, sunken spots. Infected bark may peel, often remaining attached at one or two points, giving the tree a rough, shaggy appearance.

Managing Peach Gummosis

Since the fungus overwinters in dead and infected debris, it’s crucial to clean up and destroy all diseased and dead wood and bark to control the disease. Proper pruning practices are also important, as the fungus infects wounds. Dead wood should be trimmed off, and cuts should be made just past the collar on a branch base. Avoid pruning in summer when wounds are more susceptible to infection.

There is no effective fungicide treatment for peach gummosis. However, healthy trees can recover from infection. To prevent the spread of the fungus and promote recovery, implement good hygiene practices and provide plenty of water and nutrients to reduce stress on affected trees.

Preventing Peach Gummosis

Avoid wounding trees unnecessarily.

Prune trees properly, making cuts just past the collar on a branch base.

Avoid pruning in summer when wounds are more vulnerable to infection.

Clean up and destroy all diseased and dead wood and bark.

Practice good hygiene to prevent the spread of the fungus.

Keep trees healthy by providing adequate water and nutrients.

Additional Tips

Monitor your peach trees regularly for signs of gummosis.

If you suspect gummosis, consult with a certified arborist for professional advice.

Remove infected branches or trees promptly to prevent the spread of the disease.

Avoid planting peach trees in areas with poor drainage, as wet conditions favor fungal growth.

Consider using resistant peach varieties to reduce the risk of infection.

By following these tips, you can help prevent and manage peach gummosis and keep your peach trees healthy and productive.

Gummosis: A Common Problem in Stone Fruit Trees

Introduction

Gummosis is a condition that affects stone fruit trees, such as peaches, plums, cherries, and apricots. It occurs when sap leaks from a wound in the tree’s bark. This sap is usually sticky and gummy, and it can attract insects and bacteria.

Causes of Gummosis

Gummosis is typically caused by wounds to the bark of the tree. These wounds can be caused by a variety of factors, including:

Perennial or bacterial cankers: These are fungal or bacterial infections that create open sores on the bark.
Peach tree borer: This insect larvae burrows into the bark of the tree, creating tunnels that can lead to gummosis.
Winter damage: Cold temperatures can cause the bark of the tree to crack and split, creating wounds that can lead to gummosis.
Disease damage: Other diseases, such as brown rot and scab, can also cause wounds to the bark that can lead to gummosis.
Gardening tools:不小心使用园艺工具，例如割草机或除草机，也可能损坏树皮，导致树胶病。

Preventing Gummosis

The best way to prevent gummosis is to avoid damaging the bark of your stone fruit trees. Here are some tips:

Be careful when mowing or weed whacking around your trees. Avoid hitting the trunk or branches with the blades.
Plant your trees in well-drained soil. Poor drainage can lead to root rot, which can weaken the tree and make it more susceptible to gummosis.
Choose tree varieties that are resistant to cankers. Some varieties of stone fruit trees are more resistant to cankers than others. Ask your local nursery for recommendations.
Keep your trees healthy. Healthy trees are less likely to be attacked by insects and diseases that can cause gummosis.

Treating Gummosis

If you find that your stone fruit tree is showing signs of gummosis, there are a few things you can do to treat it:

Correct any drainage problems. Poor drainage can contribute to gummosis. If the soil around your tree is not well-drained, amend it with compost or other organic matter to improve drainage.
Remove the diseased bark. Use a sharp knife to carefully remove the darkened area of bark around the wound. Be sure to remove all of the diseased tissue, but avoid cutting into the healthy bark.
Let the area dry. Once you have removed the diseased bark, allow the area to dry completely. This will help to prevent the wound from becoming infected.
Apply a fungicide. Systemic fungicides can be used to prevent certain types of gummosis. Follow the manufacturer’s instructions for use.

Conclusion

Gummosis is a common problem in stone fruit trees, but it can be prevented and treated with proper care. By following the tips in this article, you can help to keep your trees healthy and productive.

Peach Gummosis: Ursachen, Symptome und effektive Maßnahmen zur Vorbeugung und Behandlung

Peach Gummosis: A Fungal Disease of Peach Trees