Diseases Affecting Viburnum Learn About Viburnum Disease Treatment

How do you treat viburnum fungus?

If chemical control is needed, most fungal leaf spots and anthracnose can be controlled with fungicides containing chlorothalonil, thiophanate-methyl, myclobutanil, or mancozeb. Apply when symptoms first appear and repeat every 10 to 14 days as needed.

What is wrong with my viburnum?

One of the most damaging diseases of viburnum is Armillaria root rot, also known as shoestring root rot or mushroom root rot. This is another fungus, but it affects the roots of the plant and can lead to death. Initially, the leaves and stems of the plant will appear stunted, yellow and leaves may drop to the ground.

Why are my viburnum leaves turning brown?

Among the most common causes for viburnum leaves turning brown or black are leaf spot diseases. Don't panic. Leaf spot fungal diseases, as well as the fungal disease anthracnose, usually do not do lasting harm to your plants.

Why are the leaves falling off my viburnum?

Viburnums are susceptible to Armillaria root rot, a fungal disease that can cause symptoms such as stunted yellow leaves or leaf drop. ... Because the disease can remain active in the soil, do not plant another viburnum in the same place.

How do you maintain viburnum?

When it comes to viburnum care, water shrubs during dry periods. It will also help to add mulch to retain moisture. You can apply a slow-release fertilizer to viburnums as well but this isn't required. In addition, pruning the shrub should be included with viburnum care.

How do you kill viburnum?

A: Currently, there is no known way to kill viburnum leaf beetle in the pupal stage. Digging up the soil around infested plants is likely to be more damaging to the roots of the infested plant than to the pupae.

Can you hard prune viburnum?

Prune any of the Viburnum too late in the year and you will forfeit the flowers for a year or more. Most Viburnums can be rejuvenated by cutting back hard. ... This type of (drastic) pruning should be carried out in the early part of the year in order that the plant may put on growth before the following winter.

Does Viburnum make a good hedge?

Viburnum, vigorous and hardy, should be on every list of the top shrubs for hedges. All viburnum shrubs are easy care, and some have fragrant spring flowers. Creating a viburnum hedge isn't very difficult.

What do viburnum leaves look like?

Cinnamomum-leaved Viburnum (Cinnamomum camphora)

This is a variety that has dark blue, green leaves that are oval-shaped. The shrub can easily grow to be as tall as 20 feet, and it does best in zones seven to nine. The blooms are pale pink, and it will grow best in full sun or partial shade.

How do you tell if Underwatering vs overwatering?

If the soil is wet, it's overwatered - if it's dry, it's underwatered. Browning edges: Another symptom that can go both ways. Determine which by feeling the leaf showing browning: if it feels crispy and light, it is underwatered. If it feels soft and limp, it is overwatered.

Should I cut off brown leaf tips?

Should you cut off dying leaves? Yes. Remove brown and dying leaves from your house plants as soon as possible, but only if they're more than 50 percent damaged. Cutting off these leaves allows the remaining healthy foliage to receive more nutrients and improves the plant's appearance.

What does overwatering look like?

The most obvious sign of overwatering is wilting. As stated above, leaves will turn yellow and wilted – not crisp and green. Wilting can also occur throughout the plant, including the stem, buds and flowers. You will also notice the plant growing especially slow.

What should I feed my viburnum?

Viburnums appreciate an annual application of a balanced fertilizer in spring. A balanced fertilizer has an equal ratio of nitrogen, phosphorus and potassium, which should read 10-10-10 or 15-15-15 on the label.

What is eating the leaves of my viburnum?

Lady beetles, lacewings and spined soldier bugs, in different stages, eat viburnum leaf beetle larvae and adults. You can support these predators' populations with diverse landscape plantings, for habitat.

Why are viburnum leaves turning yellow?

Leaf spot is a fungal disease that may cause blotchy, yellowing leaves on viburnum, especially during damp, cool weather. ... Armillaria root rot is another fungus that commonly causes yellow leaves on viburnum, as well as a white fungal growth under the bark.

When should I prune viburnum?

If you're pruning viburnums to restrain or shape their growth, the timing for when to prune viburnum is right after flowering. Viburnums typically form their flower buds for the following year during the summer after flowering. If you wait to prune viburnums in fall or early spring, you risk cutting off flower buds.

What does viburnum mean?

: any of a genus (Viburnum) of widely distributed shrubs or small trees of the honeysuckle family with simple leaves and white or sometimes pink cymose flowers.

How deep do viburnum roots go?

The root system of a Viburnum might grow 18 inches deep or more but the majority of the feeder roots responsible for absorbing nutrients are in the top 12 inches of soil.

How do you control viburnum beetles?

Q How do I control an attack of viburnum beetle? A You can squash or pick off the larvae and adults by hand, or you can remove and bin or burn the infested shoots. Alternatively, you can spray the larvae from mid-April to early May with any insecticide recommended for a broad spectrum of plant pests.

What eats a leaf beetle?

Several generalist predators feed on viburnum leaf beetle larvae including lady beetle adults and larvae, lacewing larvae and spined soldier bugs nymphs. The lady beetle adults and spined soldier bug adults also eat adult viburnum leaf beetles.

What bugs eat snowballs?

Common insects that affect the snowball bush include snowball and bean aphids, flower thrips, scale and spider mites. Snowball aphids are dark gray or green, and you will find them in masses on new growth and on the tips of branches.