Pest & Disease Powdery mildew

Powdery mildew

Erysiphe pisi

What is Powdery mildew (Erysiphe pisi)?

Powdery mildew caused by Erysiphe pisi can indeed be a major disease affecting several plant species, including peas, beans, lentils, and clover. It is distributed worldwide and thrives in regions with dry, hot days and cool nights. Powdery mildew is a widespread fungal disease that can significantly impact the health and productivity of affected plants. Powdery mildew infections are characterized by the development of a powdery white or grayish fungal growth on the surfaces of leaves, stems, flowers, and occasionally fruit.

How does Powdery mildew (Erysiphe pisi) occur?

Powdery mildew, caused by Erysiphe pisi, reproduces through asexual means. The fungus produces spores called conidia, which are carried by wind, insects, or other means to new plant surfaces. When these spores land on susceptible host plants, they germinate and form a network of fungal structures called mycelium. The mycelium absorbs nutrients from the host plant and produces new spores, completing the reproductive cycle. This asexual reproduction allows the disease to spread rapidly and infect new plants, contributing to its prevalence and impact on crop production.

Symptoms

1 - Effects of Powdery Mildew on Plants

• Powdery mildew weakens plants, hindering photosynthesis, nutrient uptake, and metabolism, leading to stunted growth and diminished health. • Infected plants experience reduced fruit sets, deformed fruits, and lower yields, affecting crop productivity and marketability.

2 - Effects on Soil

• Infected plant debris disrupts nutrient cycling, potentially causing imbalances in soil fertility. • Powdery mildew alters soil microbial composition and activity, impacting biodiversity, nutrient availability, and overall soil health.

Solutions

1 - Preventive Measures

• Choose cultivars that are resistant to powdery mildew to reduce the risk of infection. • Provide adequate spacing between plants to ensure good air circulation, reducing the favorable conditions for powdery mildew development. • Avoid overhead irrigation and water plants at the base to keep foliage dry and minimize moisture on leaves. • Prune plants to allow better airflow and reduce humidity levels around the foliage. • Rotate legume crops with non-host plants to break the disease cycle and reduce pathogen buildup in the soil.

2 - Organic alternatives and Biofungicides

• Consider using organic fungicides, such as sulfur or neem oil, as alternative treatments for powdery mildew. Follow the product instructions and safety guidelines. • Biofungicides are natural substances derived from living organisms like bacteria, fungi, or plant extracts. Examples include Bacillus subtilis, Trichoderma spp., and neem oil. • They offer an eco-friendly alternative for controlling powdery mildew and other fungal diseases.

3 - Chemical Control

• For powdery mildew treatment, sulfur-based fungicides like wettable sulfur inhibit fungal growth and spore germination. • Triazole fungicides such as tebuconazole or propiconazole offer broad-spectrum activity by disrupting fungal cell membrane formation. • Strobilurin fungicides containing compounds like azoxystrobin or trifloxystrobin disrupt fungal respiration. Note: It's essential to follow the specific instructions, dosage rates, and safety guidelines provided by the manufacturer and local agricultural authorities when using fungicides.

Susceptible Species

European Silver Fir

Peaches And Cream Japanese Maple

European Hornbeam

Pyramidal European Hornbeam

Weeping European Hornbeam

Harlequin Glorybower

Spindle Tree

Dawyck Gold Beech

Dawyck Purple Beech

Pyramidal Beech

Weeping Beech

Purple Fountain Beech

Purple Beech

Weeping Purple Beech

Red Obelisk Beech

Arbequina European Olive

European alder

pearly everlasting

pearly everlasting

peanut

European wild ginger

king's spear

European white birch

silver birch

peacock plant

willow bell

willow bell

peach-leaved bellflower

willow bell

willow bell

willow bell

Siberian peashrub

rose peashrub

European fan palm

European fan palm

butterfly pea

cucumber

pearlbush

pearlbush

pearlbush

pearlbush

purple beech

European beech

European beech

European beech

European beech

European beech

European ash

European ash

European ash

peacock gladiolus

European larch

sweet pea

European water clover

spearmint

balsampear

prickly-pear

prickly-pear

prickly-pear

plains prickly pear

pearl millet

pearl millet

garden pea

Chinese pearlbloom

sweet pea shrub

badja peak mint bush

David's peach

dwarf peach

peach

ornamental peach

dwarf peach

peach

peach

callery pear

callery pear

callery pear

callery pear

common pear

common pear

common pear

dwarf pear

common pear

willowleaf pear

willowleaf pear

willowleaf pear

pear

pear

black elder

black elder

black elder

black elder

black elder

black elder

blue elder

black elder

string of pearls

European mountain ash

peace lily

European bladdernut

European linden

globe flower

European cranberrybush

European cranberrybush

European cranberrybush

European cranberrybush

European cranberrybush

Snowy Day Blizzard pearlbush

European crabapple

water spearmint

Asian pear

Irish moss

string-of-pearls

deadly nightshade

peace lily

European Agrimony

European Water-Plantain

Running Chuckleypear

European Beachgrass

European Beachgrass

American Hog Peanut

Tall Pussytoes

Burdock

Seep Spring Arnica

European Hart's-Tongue Fern

Halberd Leaf Orache

European Searocket

European Sea Rocket

Russian Pea Shrub

European Woodland Sedge

Common Centaury

European Chickweed

Chick Pea

Buddhist rosary bead

Red Pearls Anthurium

Pearl Laceleaf

Albino Berry

Golden Glory

Peanut

King's Spear

Peach Palm

Jasmine Pea

Brazilian Prickly Pear

Peanut Butter Fruit Tree

Peanut Butter Fruit

Wild Peanut Tree

Yellow Peacock flower

Peacock Flower

Mexican Peacock flower

Pigeon Pea

Peacock plant

Peacock Plant

Siberian Peashrub

Popcorn Cassia

Spanish Chestnut

European Centaury

Butterfly Pea

Wild Sensitive Plant

Dwarf Fan Palm

Heart-leaf Flame Pea

Butterfly Pea

Orange Peacock Ginger

Garlic Pear Tree

Sacred Garlic Pear

Madagascar Pea

String of peas

Bush Pear

Clusterpea

Pink Wild Pear

Wild Pear

Giant Spear Lily

Pearlbush

Mountain Garcinia

Coral Pea

Hibiscus Jane Cowel Double peach

Holly

Peacock Ginger

Peacock Ginger

Cape Leewin Climber

Black Coral Pea

Wild peach

European Honeysuckle

Black Pearl

Four Leaf Clover

Butterfly pea vine

Mussaenda Queen Sirikit

Santa Rita Prickly Pear

Prickly Pear

Prickly Pear

Tree Pear

French Peanut

Spearwood Bush

Pearcea

Pearcea

Pearcea

Avocado

Peacock Orchid

Sacha Inchi

Sweet Pea Bush

Peach

Blue butterfly-bush

Fragrant Pultenaea

Southern Pear

African Peach

Spear Head

Egyptian Pea

Peace Lily

Peace lily

Stanhopea

European Bladdernut

Sturt's desert pea

Tibouchina 'Peace Baby'

Tear-shrub

Sweet Peas

Spineless Hardy Prickly Pear

Purple Prickly Pear

Flowering Pear

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.