Pest & Disease Anthracnose

Anthracnose

Elsinoe corni

What is Anthracnose (Elsinoe corni)?

Spot anthracnose, caused by the fungus Elsinoe. Early symptoms in spring include numerous small reddish-purple spots on white bracts and brown spots on unfurling pink or red bracts. Throughout spring, the disease progresses, causing spotting on new leaves, shoots, petioles, and fruit. Twisted or deformed bracts and leaves with spots are common, and heavily spotted bracts may shed early, impacting the floral display.

How does Anthracnose (Elsinoe corni) occur?

During the blooming periods, the fungal spores responsible for spot anthracnose are dispersed from infected shoots to flower and leaf buds. This dispersal is facilitated by a combination of splashing water and wind. The spread and colonization of the pathogen on bracts and young leaves are favored by extended periods of mild, wet, and humid weather.

Symptoms

1 - Impact on Plants

• Spot anthracnose primarily affects above-ground plant parts like leaves, bracts, shoots, and fruit. It can cause spotting, deformation, and premature shedding of leaves and bracts. • Severe outbreaks may impact the floral display but rarely reduce overall tree vigor or health. • Spot anthracnose does not directly affect the soil or environment.

Solutions

1 - Preventions

• Ensure adequate spacing between trees to promote airflow and minimize humidity around the foliage. • Water at the base of the plant to keep foliage dry and reduce fungal spread. • Prune and remove infected branches or twigs during dormancy to minimize disease spread.

2 - Selection of Plants

• Choose early-flowering plants for partial to full shade to minimize disease outbreaks. • Select later-flowering plants for full sun, as they generally have moderate to good resistance to spot anthracnose.

3 - Plant-resistant cultivars

• Choose cultivars known for resistance or tolerance to spot anthracnose

4 - Application of Fungicides

• Fungicides such as chlorothalonil, thiophanate-methyl, and mancozeb can be used to control spot anthracnose. It's important to read and follow the label instructions and dosage recommendations of the specific fungicide product you choose.

Susceptible Species

Flamingo Boxelder

Kelly's Gold Boxelder

Japanese Maple

River Birch

River Birch (clump)

Summer Cascade Weeping River Birch

Constellation Flowering Dogwood

Eddie's White Wonder Flowering Dogwood

Aurora Flowering Dogwood

Celestial Flowering Dogwood

Stellar Pink Flowering Dogwood

Venus Flowering Dogwood

Pagoda Dogwood

Variegated Pagoda Dogwood

Variegated Giant Dogwood

Cherokee Brave Flowering Dogwood

Cherokee Chief Flowering Dogwood

Cherokee Daybreak Flowering Dogwood

Cherokee Princess Flowering Dogwood

Cherokee Sunset Flowering Dogwood

Red Flowering Dogwood

Chinese Dogwood

Blue Shadow Chinese Dogwood

China Girl Chinese Dogwood

Heart Throb Chinese Dogwood

Milky Way Chinese Dogwood

National Chinese Dogwood

Samaritan Chinese Dogwood

Satomi Chinese Dogwood

Starlight Chinese Dogwood

Chinese Dogwood

Wolf Eyes Chinese Dogwood

Cornelian Cherry Dogwood

Golden Cornelian Cherry Dogwood

Variegated Cornelian Cherry Dogwood

Leprechaun Green Ash

Patmore Green Ash

Sweet Gum

Round Leaf Sweet Gum

Silver King Sweet Gum

Slender Silhouette Sweet Gum

Worplesdon Sweet Gum

Tuliptree

Arnold Tuliptree

Yellow Variegated Tuliptree

Fastigiatum Tuliptree

Alexandrina Saucer Magnolia

Rustica Rubra Magnolia

horse chestnut

horse chestnut

snapdragon

European white birch

silver birch

false aster

false aster

false chamomile

false aster

camellia

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

tatarian dogwood

dogwood

swamp dogwood

evergreen dogwood

dogwood

dogwood

dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

flowering dogwood

hybrid dogwood

kousa dogwood

kousa dogwood

kousa dogwood

kousa dogwood

Chinese dogwood

kousa dogwood

Chinese dogwood

kousa dogwood

cornelian cherry dogwood

mountain dogwood

gray dogwood

dogwood

dogwood

dogwood

dogwood

bloodtwig dogwood

bloodtwig dogwood

bloodtwig dogwood

red twig dogwood

red twig dogwood

yellowtwig dogwood

yellow twig dogwood

red twig dogwood

red twig dogwood

red twig dogwood

dogwood

winter creeper

white ash

European ash

European ash

European ash

flowering ash

English ivy

common hop

common St. John's wort

black walnut

common privet

Chinese tulip tree

big blue lilyturf

star magnolia

spearmint

oriental plane tree

common pear

white oak

scarlet oak

pin oak

pin oak

willow oak

English oak

English oak

English oak

red oak

weeping willow

dragon's claw willow

rough goldenrod

European mountain ash

snowberry

David viburnum

Red-Flowering Currant

Vine Maple

variegated bulbous oat grass

Constellation dogwood

silverleaf dogwood

Chinese dogwood

Silver King euonymus

Idaho fescue

narrow-leafed ash

Transvaal daisy

Oregon grape

peppermint

London plane

Garry oak

tomato

Pink Pagoda mountain ash

piggyback plant

Pink Dawn chitalpa

Red-barked Dogwood

Himalayan Strawberry tree

Giant Dogwood

Flowering Dogwood

Cornelian Cherry Dogwood

Dogwood

Rice Flower

Jamaica Dogwood

FAQ

Do shade growing plants need any Sunlight?

Shade growing plants do need sunlight, although they require less than other plants. They need some direct sunlight each morning to help them photosynthesize and grow properly. Also, indirect sunlight throughout the day helps them stay healthy. Shade growing plants will benefit from the sunshine, but if they get too much or too little, then they can suffer the consequences. It's important to pay attention to the needs of your plants so that you can provide them with the proper light for optimal growth.

How often should you water indoor plants?

Indoor plants should be watered when the soil feels dry to a depth of about two inches, usually about once a week. A helpful technique to determine your plants' watering needs is to feel the soil before and after watering to get a sense of how long it takes to dry out. An important note to remember is that some plants require less water than others, and it's best to research the specific needs of your individual plants. Likewise, if your home is very dry, you might need to water more often as the lack of moisture can stress the plants and lead to problems like brown leaves and wilted stems.

Can my monstera plant get root rot?

Yes, a plant can get root rot. Root rot is a fungal disease that can be caused by over-watering, poor soil drainage, or high humidity levels in the air. Signs of root rot include yellowing leaves, wilting and stunted growth, and damaged or browning root systems. Sometimes it is difficult to detect root rot until the plant is removed from the soil, as the problems are mainly below the soil surface. Treating root rot usually involves removing the affected parts of the plant and replanting the unaffected ones.

Can I put my Monstera outside in summer?

No, you should not put your Monstera outside in summer. Monstera plants need warm, humid air to thrive, and direct sunlight can scorch their leaves. Instead, put your Monstera in a bright, sunny spot with indirect light, making sure the sun never directly hits the leaves. During the summer, keep your Monstera's soil damp and mist it occasionally to keep the leaves hydrated. At nighttime, keep the temperature around 16 - 21°C (60 - 70°F). You can definitely take your Monstera outdoors for short periods of time, just make sure to bring it back in if it starts to get too hot.

What happens if my monstera plant gets too cold?

If your monstera plant gets too cold, it will become vulnerable to pests, disease, or other damage. Cold temperatures can damage the leaves of the plant, causing them to become spotted or limp. The roots of monstera plants may also suffer in cold temperatures, leading to root rot or other diseases. Belonging to the tropical family, monsteras are used to warm environments and do not do well in cold temperatures, so it is important to ensure your plant is kept in conditions that suit their needs.

Is it possible to grow a vegetable garden in a small space?

Yes, it is possible to grow a vegetable garden in a small space. Gardening in a small space can be as simple as growing a few containerized plants in pots and raised beds, or as elaborate as vertically stacking planters, hanging pouches, and hanging baskets on a wall, railing, or fence. Regardless of the size of the space you are working with, some simple techniques such as companion planting, organic fertilizers, and water conservation can help you get the most out of your small vegetable garden.

Is peppermint herb green good for digestion?

Peppermint herb is indeed beneficial for digestion. The flavonoids in the herb support digestion by reducing inflammation in the digestive track, aiding in digestion and relieving indigestion, heartburn, and even the symptoms of irritable bowel syndrome. Additionally, peppermint is naturally rich in menthol, which helps to relax the muscles of the stomach, aiding in the digestion of food. Peppermint herb can be consumed in a variety of forms, such as teas, tinctures and capsules, as well as by adding the herb to food or directly to water or tea.

Should peppermint herb green be consumed daily?

No, peppermint herb green should not be consumed daily. This is because it contains high levels of menthol, which can be toxic if taken in large doses. Additionally, consuming large amounts of peppermint herb green could interfere with the absorption of essential minerals and vitamins, potentially causing vitamin deficiencies. For these reasons, it is best to consult with a doctor before incorporating peppermint herb green into your daily diet.