I found 4 separate examples of this leaf issue. This virus has little effect on plant vigour. Occurrence of the disease is sporadic and depends on the spring weather. I have just trimmed my camellia hedge and found a cluster of leaves that are yellowish and swollen 3/4 times the normal size. Your camellia leaves have a fungus called camellia leaf gall. Camellia Society. Leaf galls rarely do permanent damage to the plant. Do not simply drop them on the ground. Home Articles Caring for Camellias Pests and diseases of camellias. Damaged plants show more symptoms … Although they are evergreen plants, camellias still periodically shed their old leaves. Other plant pathologists think that the spores are produced the following year from old dried, brown galls that fell to the ground around infected plants the previous year. But under humid conditions and in shaded locations, galls may form on leaves throughout the plant canopy. Scale is noticed by its white powdery substance under the leaves and results in a yellow mottled appearance to the upper leaves. Gray blotches appear on the bark and stem, and then sunken areas (cankers) develop, eventually girdling the stem. Branch tips usually die. Sometimes a white powdery substance is observed on the leaf. Camellia sinensis in particular can be problematic if a person consumes too many leaves. Symptoms vary somewhat based on the host plant. I’ve seen this on azaleas but not on camellias. This plant's leaves are used to make tea and contain caffeine as well as other compounds that can elevate heart rates, cause palpitations and even produce convulsions. Some plant pathologists believe that once the spores are released, they are blown and washed to leaf and flower buds where they cause new infections. This unusual growth is caused by a fungus that can deform several different plants, including azalea, camellia, blueberry and fetterbush. Read on to learn what causes camellia leaf gall … Camellia. Common Pests and Diseases of Camellias. No sign of bugs! You will probably lose some leaves, but future flowering will not be totally compromised. Infected blueberry leaves turn an unusual bright red in spring with almost no swelling of tissue. Leaf galls are caused by a fungus which can affect the beauty of plant as well as flower production. This fungus causes leaves and flower petals to enlarge abnormally. Since most azalea plant parts are toxic, I wouldn’t recommend this particular snack to you. It can also be a natural part of the plants growth habit of some cameliias. This disease is caused by a fungus, Exobasidium camelliae.Infected leaves become fleshy, thick, and discolored. The infected leaves will usually fall prematurely. The spores then blow and splash onto new leaves and petals as they emerge in spring causing infection. Is it the same thing? Larry Williams is the Extension horticulture agent with the Okaloosa County Cooperative Extension Service, University of Florida. Exobasidium vaccinii causes leaves and flowers to become swollen or thickened, curled, waxy and fleshy in appearance. Q: The leaves on the ends of some of my camellia branches are swollen and thicker than the rest of the leaves. Irregular yellow or creamy-white blotches on the leaves may be the result of infection by Camellia yellow mottle virus. Parts of the plant above the stem canker lose vigor, wilt, and die. This can be caused by mineral deficiency, also by cold weather or over watering. Galls then form the following spring. Generally blooming after the Japanese camellias, they result from the cross of Camellia japonica and Camellia saluenensis. The culprit is a fungus Exobasidium camelliae whose spores are carried by the wind in search of camellias. The disease is also called “pinkster gall” or “pinkster apple”, because it affects the wild Pinkster azalea (Rhododendron periclymenoides). This disease is more severe during a cool, wet spring. Your plants were infected last year when spores from a similarly swollen camellia leaf were released. It does not cause damage to older leaves and twigs on the plant. It’s best to bury, burn or place infected leaves in a bag and throw them away. One or both lines of thought may be true. It is caused by the fungus Exobasidium spp.. A: It is indeed the same disease: camellia (or azalea) leaf gall. This fungus causes leaves and flower petals to enlarge abnormally. Some years azaleas throughout Atlanta seem to be afflicted; some years only a few. Among the most glamorous shrubs, camellias are upright or spreading, glossy-leaved evergreens, with white, pink or red flowers. Leaves on affected branches suddenly turn yellow and wilt. Yellow leaves can indicate that a plant is suffering from a nutrient deficiency or is affected by cold weather, but yellow blotches on camellia leaves are often caused by a virus. Every year, my Camellia sasanquas get leaf gall.. If you want to protect the buds for next year, spray with a landscape fungicide (click for sources) just before new leaves unfurl in spring and again ten days later. The white growth consists of spores, which is how the fungus reproduces. ©2020 Walter Reeves / The Simple Gardener, Inc. All Rights Reserved. Normally only a few leaves show symptoms, which can range from a few spots to almost the whole leaf being yellow. It is commonly referred to as azalea leaf and flower gall. They may also be twisted and distorted. It is caused by the fungus Exobasidium spp.. When being affected, the leaves will be twisted, swollen and thickened; even the color might be changed. ... Take a cutting of approximately 10cm length, including a node (a swollen section of stem where leaves, stems, roots originate). You must leave a sprinkler (a cone and a bottle will do the trick) and especially water gradually during drought. Camellia Dieback & Canker: This is one of the most serious of all camellia diseases and is caused by the fungus Glomerella cingulata. Your plants were infected last year when spores from a similarly swollen camellia leaf were released. The best treatment is to pluck off the mal-formed leaves, put them in a plastic bag and put them in the garbage. Among the most cold-hardy camellias (inherited from the japonica parent), most of them are extremely vigorous, free-blooming, with attractive, semi-glossy, leathery leaves. Contact Larry at 689-5850 or email [email protected] Dip this into rooting hormone gel or powder and place into propagation mix deep enough so that it stands by itself. Exobasidium vaccinii causes leaves and flowers to become swollen or thickened, curled, waxy and fleshy in appearance. It is easy to detect camellia leaf gall disease. There is not much you can do for the problem now other than pick off and destroy the affected leaves. In fact, fungal leaf gall is a common disease of camellias, azaleas, and rhododendrons. In the home landscape, the fungus does not cause any long-term problems for plants. Once you see evidence of infected leaves, it’s too late for chemical control. Not affiliated with the City of Niceville, Sports, Leagues, Sports Clubs, Outdoor Recreation, Okaloosa County Cooperative Extension Service, Growing Brussels sprouts in the winter garden. Leaves infected with the fungus become swollen and appear very large and thick. Besides, there is no effective or practical fungicide to control this disease in the home landscape. It’s more common for the plant’s lower leaves to be the most heavily infected. Generally it is only a few leaves and these can simply be pruned away. All Rights Reserved. Posts about swollen leaves written by missinghenrymitchell. Finish the job before the galls turn gray, the stage when new spores are produced. It is commonly referred to as azalea leaf and flower gall. I’m sure the leaves are swollen and engorged like grotesque malformations on your plant. A: It is indeed the same disease: camellia (or azalea) leaf gall. With azaleas and camellias, leaves become large and distorted and eventually a white powder covers the galls. Camellia x williamsii are the first camellia hybrids. Browse and purchase gardening books by Walter Reeves, plus select titles by other authors. But in either case, it’s important to remove and dispose of infected leaves before they turn white with spores. Do you have azalea or camellia plants with leaves or flower petals that are swollen and malformed?