What to do about boxwood blight

What to do about boxwood blight

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Boxwood blight is a plant disease that can quickly destroy your plants. If you grow boxwood, then you must equip yourself with this knowledge, so you know later what to do with boxwood blight on your plants so that the beauty of the plant still radiates.

Boxwood blight is a disease in the fungal category and spreads very quickly, it is a common disease in North America. Those who care for and love boxwood plants really have to struggle and learn all the ways to deal with boxwood blight. We have not seen the destruction of this disease in our test gardens. But we have to know how to fight this disease when it comes to boxwood plants. If you are struggling like us to eradicate boxwood blight, then let us help you with this useful information. We will explain what you should do with boxwood blight in your garden. Read on for this article to the end!

What is boxwood blight?

Boxwood blight is a disease caused by the pathogen Calonectria pseudonavicu-latum, this disease can also affect other plants that like to grow in shade, such as sweet box and pachysandra. A disease that causes boxwood to burn on the trunk, and the leaves will appear blackened at the edges.

When this disease has spread, then the leaves will turn like straw and then fall. It can also be confused with volutella blight or winter burn; so the symptoms are similar so that many mistakenly think about this disease. For certainty about the disease, it is very necessary to diagnose plant diseases.

How is boxwood blight spread?

Boxwood blight occurs by spreading through other plants that have this disease, this can occur due to contact with infected seeds, clothing, equipment and can even be spread through vegetables in holiday decorations such as bouquets and others. Spores can survive in the soil for up to five years and this is a very long time, so it is a type of disease that can last quite a long time. This is especially true for newly planted boxwood plants, especially if you plant them in a landfill where infected plants are located.

Until now, there is no cure for boxwood blight, so you have to really treat the plants and if there are infected plants you should cut them and burn them so that nothing is left in the soil, considering that the spores last up to 5 years.

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What to do about boxwood blight?

Ok, if boxwood blight occurs on your favorite plant, do the following for treatment and prevention of the spread of disease.

If it’s still in its early stages, cut off any affected branches, and remove any debris from the ground, throw it in the trash and burn it, or bury it at least two feet in the ground. Don’t compost diseased leaves unless you burn them, as this will remove spores. For the remaining leaves, you can prevent infection from boxwood blight. You can spray chlorothalonil containing the fungicide every 7 to 14 days. Do this spray when the temperature is 60 F. But if it rains, reapply this fungicide because the warm and humid weather causes mold to thrive. This fungicide should be used with caution, make sure you read the instructions correctly because this fungicide is toxic to fish.

All tools you use, you must sanitize them, use a bleach mixture in a ratio of 1:9 to water, all your clothes infected with boxwood blight must be washed. Clean any material that may have come into contact with infected plants, the goal is to remove disease-causing spores.

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If you want to grow bowood, you should look for species that are resistant to boxwood blight. Here are some boxwoods that are resistant to the disease.

Boxwood cultivars that are resistant to boxwood blight

There are several boxwood cultivars that are resistant to boxwood blight, including the following:

  • North Star® boxwood (Buxus sempervirens)
  • Sprinter® littleleaf boxwood (Buxus microphylla)
  • 24 to 32 in. tall and wide, cold hardy in zones 5 to 9
  • ‘Green Beauty’ littleleaf boxwood (Buxus microphylla japonica)
  • 2 to 4 ft. tall and wide, cold hardy in zones 5 to 8
  • ‘Winter Gem’ Korean boxwood (Buxus sinica insularis)
  • 3 to 5 ft. tall and wide; cold hardy in zones 6 to 9
  • 2 to 3 ft. tall and wide, cold hardy in zones 5 to 9

You can plant varieties of plants that are resistant to this disease in place of dead plants. You should note that plants that are resistant to boxwood blight can also be exposed to spores but do not show any symptoms, but this can transmit the spores to plants that are not resistant to the disease.

Sometimes this plant also needs to be given a fungicide to suppress the disease if there are symptoms that appear. However, it is very rare for these cultivars to show the same symptoms as plants that cannot tolerate boxwood blight.

How to prevent boxwood blight

  1. If the boxwood blight hasn’t happened yet, here are some things you can do to minimize the risk:
  2. In a new place, try planting a type of boxwood that likes open places such as the type with small leaves, making the distance between one another with a distance far enough so that the branches do not hit each other.
  3. Avoid watering over the leaves as it can get wet and this gives the spores a chance to survive.
  4. Trim the leaves, pull out weeds, do other treatments when the boxwood is dry, so you don’t hit the spores and the spores don’t stick to your clothes. Also make sure all your garden equipment is clean and sterile from spores.
  5. Mulch should be thicker, use mulch with a thickness of 2 inches, you can use pine wood, this is good for watering so it doesn’t cause spores in the soil to move to plant leaves.
  6. Buy boxwood only from nurseries that are certified disease free, this will give you a great chance of successfully growing quality boxwood.

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Get plants with the same appearance as boxwood

If you have an accident where your boxwood is now dead and you can’t prevent it from spreading boxwood blight. Don’t be discouraged, you can plant other plants that are similar to boxwood and you don’t need to be afraid anymore of boxwood blight because this plant does not work with similar diseases.

There are other plants that have the same texture and leaf shape as boxwood. It can even be shaped, it can be shaved with the same shape. You can grow a similar plant while waiting for experts to find a cure for boxwood blight.