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Japanese camellia 'Doctor Tinsley'
Camellia japonica 'Doctor Tinsley'
Also known as : Rose of winter 'Doctor Tinsley'
Japanese camellia 'Doctor Tinsley' is cultivated from Japanese camellia. It grows lower than its parent plant and others in the family, making it a gardeners favorite in container gardens. It also has a longer blooming period and produces semi-double flowers while other cultivars produce single or double blooms.
Hardiness Zones
8 to 10
Care Guide for Japanese camellia 'Doctor Tinsley'
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Japanese camellia 'Doctor Tinsley'
Water
Every week
Sunlight
Full sun
Key Facts About Japanese camellia 'Doctor Tinsley'
Feedback
Attributes of Japanese camellia 'Doctor Tinsley'
Lifespan
Perennial
Plant Type
Shrub
Plant Height
8 m
Spread
8 m
Leaf Color
Green
Flower Size
10 cm
Flower Color
White
Pink
Leaf type
Evergreen
Ideal Temperature
15 - 35 ℃
Scientific Classification of Japanese camellia 'Doctor Tinsley'
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Common Pests & Diseases About Japanese camellia 'Doctor Tinsley'
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Common issues for Japanese camellia 'Doctor Tinsley' based on 10 million real cases
Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Solutions: Like other fungal diseases, the progression of petal blight is extremely difficult to stop and impossible to reverse once it infects a plant. The best course of action is to remove all damaged flowers immediately and dispose of them entirely. Do not put them in the compost pile, where spores could grow and spread.
Leaf Weevils
Leaf Weevils are insects that feed on the leaves of plants.
Solutions: Leaf Weevils are relatively easy to control once their presence is discovered. Here’s what to do: Spray the foliage with an insecticide Place sticky traps around the lower trunks of fruit trees and other woody plants. Weevils can’t fly, and have to crawl up the plants when they emerge from the soil. Dig into the soil around plants with a garden fork and remove and dispose of any larvae. Let chickens roam around the garden, as they love to feed on weevil larvae.
Anthracnose
Anthracnose causes grey-brown spots with black margins on leaves and stems.
Solutions: For less serious cases when only a few leaves are affected, complete the following: Prune affected leaves. Using pruning shears, remove leaves that have spots. Dispose of these leaves to avoid spreading the disease to other plants. Clear debris. To stop the spread of disease, remove debris and weeds from around plants. For serious cases when many leaves are infected with large splotches: Apply a fungicide. Fungicides won't cure current infections, but they will prevent anthracnose from spreading to uninfected tissue. Apply a fungicide before a dry period following product instructions. Products containing copper diammonia diacetate are most likely to be effective.
Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
- Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
- Placement is often random and scattered as diseases are spread through raindrops.
- May appear on lower leaves and the interior of the plant where humidity is higher.
- Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
- Leaf margins may turn yellow.
- Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
- Blotches grow in size until the entire leaf is brown.
- The leaf falls off the plant.
Severe Symptoms
- Partial or complete premature defoliation
- Reduced growth
- Increased susceptibility to pests and other diseases
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
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Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Overview
Petal blight, sometimes called flower blight, is a fungal disease that only affects the blooms of some ornamental flowering plants. As the infection progresses, it destroys the flower, yet it never damages the vegetative or green parts of the plant.
When flowers are infected, the symptoms look similar to Botrytis blight, but Botrytis also infects dead or dormant vegetative tissue.
The disease was first discovered in Japanese plants in 1919 and in the US in the late 1930s. Presently it is also found in New Zealand, Australia, and parts of Europe. Unfortunately, no plants have high resistance to petal blight, but specific cultivars are more susceptible than others, particularly species with double blooms.
Petal blight infection rates are high when temperatures are mild to warm (optimum temperatures are 15 to 21 ℃) and the weather is misty or rainy.
Overall, petal blight is an aesthetic problem that ruins blossoms. The disease is not harmful to the long-term health of the plant.
Symptom Analysis
The severity of the symptoms varies, depending upon the species of plant infected. Signs of petal blight are commonly seen on the blooms just after they open.
- Pallid spots on colored petals.
- Brown spots on white petals.
- Browning around the petal edges.
- Small spots look water-soaked.
- Spots rapidly enlarge and merge.
- Flowers become limp.
- The entire flower turns light brown, but does not crumble.
- Flowers become slimy at first and then take on a leathery texture.
- A ring of white or gray mycelium can be seen at the base of the petals.
Disease Cause
Petal blight is caused by several different fungi, with each type infecting specific plants. Ovulinia azalea infects azaleas species and cultivars, and rhododendrons. Ciborinia camelliae infects camellia cultivars.
Shortly after blooming, the fungus infects the base of the flowers by the calyx. The fungus produces cell wall-degrading enzymes that destroy flowers within a couple of days. When the flowers fall to the ground, the fungus' hard fruiting bodies fall to the soil as well, overwintering until the following spring.
When temperatures hit the optimum range the following season, spores are transmitted by insects or can spread on wind currents up to about 12 miles. Once in the soil, the pathogen can be active for three to five years.
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Leaf Weevils
Leaf Weevils are insects that feed on the leaves of plants.
Overview
Leaf Weevils are insects that feed on the leaves of plants. They can cause major damage to both edible and non-edible plants. Watch out for these garden pests and use control measures to get rid of them as soon as the problem is noticed.
Symptom Analysis
Leaf Weevils are small flightless insects that are typically around 6 mm long. They have a hard body that is oval shaped and covered in short hairs, a long snout on their head that is downward facing, and 3 pairs of legs with hooked claws.
Once mated, the female weevil with lay around 20 eggs at one time, either in leaf litter on the ground or sometimes on the soil. Weevils generally only produce one batch of eggs a year but may produce 2 if conditions are ideal.
The eggs take around 6 to 15 days to hatch. When the larva emerges, it burrows into the soil. These larvae have chewing mouth parts and no legs. They feed on the roots of the plants. When this happens, you may see signs of wilting of the leaves, stems, and flowers as the plant can’t deliver enough water from the roots to the above-ground growing parts.
Eventually, the larva evolves into a soft white pupa. The pupating period normally takes around 1 to 3 weeks. After this, the adult leaf weevil will emerge and crawl up the plant to feed on the leaves.
Adult leaf Weevils feed on young leaves, stems, flowers, and buds of almost any plant. This includes many varieties of fruits and vegetables as well as ornamental plants. This creates irregular round holes in the leaves. These holes normally start at the edges of the leaf. Holes may also be made in flowers, lesions may be caused on the skin of fruit, and sometimes whole stems are chewed off.
These insects prefer a humid environment with warm temperatures. They are mostly active during the night and will hide in leaf litter, mulch, and other debris during the day.
Solutions
Leaf Weevils are relatively easy to control once their presence is discovered. Here’s what to do:
- Spray the foliage with an insecticide
- Place sticky traps around the lower trunks of fruit trees and other woody plants. Weevils can’t fly, and have to crawl up the plants when they emerge from the soil.
- Dig into the soil around plants with a garden fork and remove and dispose of any larvae.
- Let chickens roam around the garden, as they love to feed on weevil larvae.
Continue reading in our app - it's better
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Scan the QR code with your phone camera to download the app
Anthracnose
Anthracnose causes grey-brown spots with black margins on leaves and stems.
Overview
Anthracnose is a group of fungal diseases that affects foliage, twigs, and stems. It can affect a wide variety of plants including trees, shrubs, vegetables, grasses, and flowers and is most likely to occur in cool, wet conditions. It often occurs in the spring when rain splashes on overwintering fungi.
Some varieties of plants are bred to be resistant to anthracnose. If plants are not resistant, they can become infected year after year. Plants can also recover from infection only to be reinfected later that year.
In most cases, anthracnose only causes minor damage. However, young plants are susceptible to major damage. In the worst-case scenarios, this disease can cause major defoliation.
Symptom Analysis
Plant leaves will show gray or brown blotches that may be surrounded by black edges. Blotches may be only one small spot or many spots that cover an entire leaf. If these symptoms progress, leaves may drop prematurely.
Anthracnose can also cause small lesions on twigs and stems. These often appear as brown, gray, or orange blisters. If left untreated, twigs may drop.
Disease Cause
Anthracnose is caused by one of several possible fungi. These pathogens overwinter on plant debris. When water hits these fungi in the spring, spores release and land on plant tissue. When the spores germinate on leaf or twig tissue, they cause anthracnose symptoms.
These fungi need moist conditions to live. Therefore, they will not be a problem in dry conditions.
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Scan the QR code with your phone camera to download the app
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Continue reading in our app - it's better
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About
Care Guide
More Info
Pests & Diseases
Japanese camellia 'Doctor Tinsley'
Camellia japonica 'Doctor Tinsley'
Also known as: Rose of winter 'Doctor Tinsley'
Japanese camellia 'Doctor Tinsley' is cultivated from Japanese camellia. It grows lower than its parent plant and others in the family, making it a gardeners favorite in container gardens. It also has a longer blooming period and produces semi-double flowers while other cultivars produce single or double blooms.
Hardiness Zones
8 to 10
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Care Guide for Japanese camellia 'Doctor Tinsley'
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Find the best spots for them to optimize their health, simply using your phone.
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Key Facts About Japanese camellia 'Doctor Tinsley'
Feedback
Attributes of Japanese camellia 'Doctor Tinsley'
Lifespan
Perennial
Plant Type
Shrub
Plant Height
8 m
Spread
8 m
Leaf Color
Green
Flower Size
10 cm
Flower Color
White
Pink
Leaf type
Evergreen
Ideal Temperature
15 - 35 ℃
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Scientific Classification of Japanese camellia 'Doctor Tinsley'
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Common Pests & Diseases About Japanese camellia 'Doctor Tinsley'
Feedback
Common issues for Japanese camellia 'Doctor Tinsley' based on 10 million real cases
Brown spot
This infection can cause brown spots or patches to appear on the plant.
Solutions: In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary. Organic options won’t kill the fungus, but will prevent it from spreading. Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear. Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread. Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Learn More About the Brown spot ![more]()
Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Solutions: Like other fungal diseases, the progression of petal blight is extremely difficult to stop and impossible to reverse once it infects a plant. The best course of action is to remove all damaged flowers immediately and dispose of them entirely. Do not put them in the compost pile, where spores could grow and spread.
Learn More About the Petal blight ![more]()
Leaf Weevils
Leaf Weevils are insects that feed on the leaves of plants.
Solutions: Leaf Weevils are relatively easy to control once their presence is discovered. Here’s what to do: Spray the foliage with an insecticide Place sticky traps around the lower trunks of fruit trees and other woody plants. Weevils can’t fly, and have to crawl up the plants when they emerge from the soil. Dig into the soil around plants with a garden fork and remove and dispose of any larvae. Let chickens roam around the garden, as they love to feed on weevil larvae.
Learn More About the Leaf Weevils ![more]()
Anthracnose
Anthracnose causes grey-brown spots with black margins on leaves and stems.
Solutions: For less serious cases when only a few leaves are affected, complete the following: Prune affected leaves. Using pruning shears, remove leaves that have spots. Dispose of these leaves to avoid spreading the disease to other plants. Clear debris. To stop the spread of disease, remove debris and weeds from around plants. For serious cases when many leaves are infected with large splotches: Apply a fungicide. Fungicides won't cure current infections, but they will prevent anthracnose from spreading to uninfected tissue. Apply a fungicide before a dry period following product instructions. Products containing copper diammonia diacetate are most likely to be effective.
Learn More About the Anthracnose ![more]()
Brown spot
This infection can cause brown spots or patches to appear on the plant.
Overview
Discolored spots on the foliage of plants are one of the most common disease problems people observe. These spots are caused by fungal and bacterial diseases, with most infections related to a fungal pathogen.
Brown spot can occurs on all houseplants, flowering ornamentals, vegetable plants, and leaves of trees, bushes, and shrubs. No plants are resistant to it, and the problem is worse in warm, wet environments. It can occur at any point in the life stage as long as leaves are present.
Small brownish spots appear on the foliage and enlarge as the disease progresses. In severe cases, the plant or tree is weakened when the lesions interrupt photosynthesis or cause defoliation.
Symptom Analysis
In most cases, brown spot only affects a small percentage of the whole plant, appearing on a small amount of the leaves. A small infection only puts minor stress on the plant. However, if left untreated and the disease progresses over numerous seasons, it will severely impact the health and productivity of the infected specimen.
- Sporulation begins (reproduction of the fungal spores), and tiny spots appear on leaves.
- Placement is often random and scattered as diseases are spread through raindrops.
- May appear on lower leaves and the interior of the plant where humidity is higher.
- Brown spots enlarge and grow large enough to touch neighboring spots to form a more prominent blotch.
- Leaf margins may turn yellow.
- Tiny black dots (fruiting bodies of the fungi) appear in the dead spots.
- Blotches grow in size until the entire leaf is brown.
- The leaf falls off the plant.
Severe Symptoms
- Partial or complete premature defoliation
- Reduced growth
- Increased susceptibility to pests and other diseases
Disease Cause
Brown spot, or leaf spot, is a common descriptive term given to several diseases affecting the leaves of plants and trees. Around 85% of diseases exhibiting leaf spots are due to fungus or fungus-like organisms. Sometimes brown spot is caused by a bacterial infection, or insect activity with similar symptoms.
When conditions are warm and the leaf surfaces are wet, fungal spores being transported by wind or rain land on the surface and cling to it. They do not rupture the cell walls but grow in the space between the plant plasma membrane and the plant cell wall. As the spores reproduce, they release toxins and enzymes that cause necrotic spots (i.e., dead tissue) on the leaves, allowing the fungi to consume the products released when the cells degrade.
Solutions
In minor cases of brown spot, there isn’t any need to treat the disease. However, if much of the foliage is affected and defoliation occurs, the plant will benefit from getting rid of the infection. It is recommended to start by applying organic treatment options, working up to the more potent synthetic, chemical fungicides if necessary.
Organic options won’t kill the fungus, but will prevent it from spreading.
- Dissolve ½ teaspoon of baking soda and one teaspoon of liquid soap in a gallon of water. Using a spray bottle, spray on tops and bottoms of leaves until the mixture drips off. Repeat every two weeks until existing spots stop enlarging and new spots no longer appear.
- Spray a copper-based fungicidal soap on the leaves, coating the top and bottom leaf surfaces. Reapply as directed on the product label. Copper penetrates the leaf surface and prevents germination of spores so the fungus cannot spread.
- Apply an all-purpose fungicide to the entire plant, following the label instructions carefully.
Prevention
Like many other diseases, it is easier to prevent brown spot than cure it, and this is done through cultural practices.
- Clear fall leaves from the ground before winter to minimize places where fungi and bacteria can overwinter.
- Maintain good air movement between plants through proper plant spacing.
- Increase air circulation through the center of plants through pruning.
- Thoroughly clean all pruning tools after working with diseased plants.
- Never dispose of disease plant material in a compost pile.
- Avoid overhead watering to keep moisture off of the foliage.
- Keep plants healthy by providing adequate sunlight, water, and fertilizer.
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Petal blight
Bacterial infections can cause flowers to become soft and rotten.
Overview
Petal blight, sometimes called flower blight, is a fungal disease that only affects the blooms of some ornamental flowering plants. As the infection progresses, it destroys the flower, yet it never damages the vegetative or green parts of the plant.
When flowers are infected, the symptoms look similar to Botrytis blight, but Botrytis also infects dead or dormant vegetative tissue.
The disease was first discovered in Japanese plants in 1919 and in the US in the late 1930s. Presently it is also found in New Zealand, Australia, and parts of Europe. Unfortunately, no plants have high resistance to petal blight, but specific cultivars are more susceptible than others, particularly species with double blooms.
Petal blight infection rates are high when temperatures are mild to warm (optimum temperatures are 15 to 21 ℃) and the weather is misty or rainy.
Overall, petal blight is an aesthetic problem that ruins blossoms. The disease is not harmful to the long-term health of the plant.
Symptom Analysis
The severity of the symptoms varies, depending upon the species of plant infected. Signs of petal blight are commonly seen on the blooms just after they open.
- Pallid spots on colored petals.
- Brown spots on white petals.
- Browning around the petal edges.
- Small spots look water-soaked.
- Spots rapidly enlarge and merge.
- Flowers become limp.
- The entire flower turns light brown, but does not crumble.
- Flowers become slimy at first and then take on a leathery texture.
- A ring of white or gray mycelium can be seen at the base of the petals.
Disease Cause
Petal blight is caused by several different fungi, with each type infecting specific plants. Ovulinia azalea infects azaleas species and cultivars, and rhododendrons. Ciborinia camelliae infects camellia cultivars.
Shortly after blooming, the fungus infects the base of the flowers by the calyx. The fungus produces cell wall-degrading enzymes that destroy flowers within a couple of days. When the flowers fall to the ground, the fungus' hard fruiting bodies fall to the soil as well, overwintering until the following spring.
When temperatures hit the optimum range the following season, spores are transmitted by insects or can spread on wind currents up to about 12 miles. Once in the soil, the pathogen can be active for three to five years.
Solutions
Like other fungal diseases, the progression of petal blight is extremely difficult to stop and impossible to reverse once it infects a plant. The best course of action is to remove all damaged flowers immediately and dispose of them entirely. Do not put them in the compost pile, where spores could grow and spread.
Prevention
- Apply a preventative dose of fungicide as soon as blooms start to show color on the plant. The preventative can be applied as a soil drench or directly to the flowers on the plant.
- Avoid overhead watering during blooming.
- Remove any leaf litter and dead flowers at the end of the season.
- Cover the ground under infected plants with 4” of fresh organic mulch before winter, taking care not to disturb the infected soil.
- Buy bare-root specimens when available.
- When potted plants are purchased, remove the top layer of potting soil and replace it with fresh mulch.
- Plant cultivars that bloom early in the season before the temperatures get high enough for petal blight pathogens to be spreading.
Continue reading in our app - it's better
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unlimited guides at your fingertips...
unlimited guides at your fingertips...
Leaf Weevils
Leaf Weevils are insects that feed on the leaves of plants.
Overview
Leaf Weevils are insects that feed on the leaves of plants. They can cause major damage to both edible and non-edible plants. Watch out for these garden pests and use control measures to get rid of them as soon as the problem is noticed.
Symptom Analysis
Leaf Weevils are small flightless insects that are typically around 6 mm long. They have a hard body that is oval shaped and covered in short hairs, a long snout on their head that is downward facing, and 3 pairs of legs with hooked claws.
Once mated, the female weevil with lay around 20 eggs at one time, either in leaf litter on the ground or sometimes on the soil. Weevils generally only produce one batch of eggs a year but may produce 2 if conditions are ideal.
The eggs take around 6 to 15 days to hatch. When the larva emerges, it burrows into the soil. These larvae have chewing mouth parts and no legs. They feed on the roots of the plants. When this happens, you may see signs of wilting of the leaves, stems, and flowers as the plant can’t deliver enough water from the roots to the above-ground growing parts.
Eventually, the larva evolves into a soft white pupa. The pupating period normally takes around 1 to 3 weeks. After this, the adult leaf weevil will emerge and crawl up the plant to feed on the leaves.
Adult leaf Weevils feed on young leaves, stems, flowers, and buds of almost any plant. This includes many varieties of fruits and vegetables as well as ornamental plants. This creates irregular round holes in the leaves. These holes normally start at the edges of the leaf. Holes may also be made in flowers, lesions may be caused on the skin of fruit, and sometimes whole stems are chewed off.
These insects prefer a humid environment with warm temperatures. They are mostly active during the night and will hide in leaf litter, mulch, and other debris during the day.
Solutions
Leaf Weevils are relatively easy to control once their presence is discovered. Here’s what to do:
- Spray the foliage with an insecticide
- Place sticky traps around the lower trunks of fruit trees and other woody plants. Weevils can’t fly, and have to crawl up the plants when they emerge from the soil.
- Dig into the soil around plants with a garden fork and remove and dispose of any larvae.
- Let chickens roam around the garden, as they love to feed on weevil larvae.
Prevention
There are various ways to keep leaf Weevils away from plants.
- Remove weeds such as dandelion, capeweed, portulaca, mallow, sorrel, and dock. Leaf Weevils are attracted to these weeds and will set up a colony.
- Make sure fruit trees are well spaced from each other. This ensures that the weevils and their larvae don’t spread from one tree to the next.
- Cultivate the soil before planting a new crop. This allows any larvae or pupae in the soil to be unearthed and disposed of.
- Regularly fertilize the soil to encourage both earthworm and microbial activity.
- Check plants regularly to see any signs of leaf weevil activity. Also check under loose bark, mulch, leaf litter, and in the junction of stems on the plant.
Continue reading in our app - it's better
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Anthracnose
Anthracnose causes grey-brown spots with black margins on leaves and stems.
Overview
Anthracnose is a group of fungal diseases that affects foliage, twigs, and stems. It can affect a wide variety of plants including trees, shrubs, vegetables, grasses, and flowers and is most likely to occur in cool, wet conditions. It often occurs in the spring when rain splashes on overwintering fungi.
Some varieties of plants are bred to be resistant to anthracnose. If plants are not resistant, they can become infected year after year. Plants can also recover from infection only to be reinfected later that year.
In most cases, anthracnose only causes minor damage. However, young plants are susceptible to major damage. In the worst-case scenarios, this disease can cause major defoliation.
Symptom Analysis
Plant leaves will show gray or brown blotches that may be surrounded by black edges. Blotches may be only one small spot or many spots that cover an entire leaf. If these symptoms progress, leaves may drop prematurely.
Anthracnose can also cause small lesions on twigs and stems. These often appear as brown, gray, or orange blisters. If left untreated, twigs may drop.
Disease Cause
Anthracnose is caused by one of several possible fungi. These pathogens overwinter on plant debris. When water hits these fungi in the spring, spores release and land on plant tissue. When the spores germinate on leaf or twig tissue, they cause anthracnose symptoms.
These fungi need moist conditions to live. Therefore, they will not be a problem in dry conditions.
Solutions
For less serious cases when only a few leaves are affected, complete the following:
- Prune affected leaves. Using pruning shears, remove leaves that have spots. Dispose of these leaves to avoid spreading the disease to other plants.
- Clear debris. To stop the spread of disease, remove debris and weeds from around plants.
For serious cases when many leaves are infected with large splotches:
- Apply a fungicide. Fungicides won't cure current infections, but they will prevent anthracnose from spreading to uninfected tissue. Apply a fungicide before a dry period following product instructions. Products containing copper diammonia diacetate are most likely to be effective.
Prevention
Since anthracnose is difficult to treat once it appears, it's important to prevent it from infecting your plants.
- Remove debris. Clear all old plant material and weeds from under and around plants in the fall. This material can harbor anthracnose spores that will later infect plants.
- Select resistant varieties. When adding new plants, choose varieties that are resistant to anthracnose.
- Increase airflow. Anthracnose thrives in wet conditions, so space plants far enough apart to allow for good airflow.
- Avoid overhead irrigation. To keep plant tissue dry, avoid using overhead irrigation. Instead, water at the base of plants or install drip irrigation.
- Use a preventative fungicide. If there is a reason to suspect future anthracnose outbreaks, apply a fungicide in the early spring.
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
Treat and prevent plant diseases.
AI-powered plant doctor helps you diagnose plant problems in seconds.
Download the App for Free
Your Ultimate Guide to Plants
Identify grow and nurture the better way!
17,000 local species +400,000 global species studied
Nearly 5 years of research
80+ scholars in botany and gardening
Continue reading in our app - it's better
A database of 400000+ plants
unlimited guides at your fingertips...
unlimited guides at your fingertips...
