Close Menu
LiveHealthNews
    What's Hot
    Garden

    How to Identify and Control Hollyhock Weevils

    Health

    The Counterintuitive Way I Lost Weight By Eating More

    Wellness

    Knowing the Signs of Nutritional Deficiencies

    Important Pages:
    • Home
    • About Us
    • Contact us
    • Privacy Policy
    • Terms & Conditions
    Facebook X (Twitter) Instagram Pinterest
    • Home
    • About Us
    • Contact us
    • Privacy Policy
    • Terms & Conditions
    Facebook X (Twitter) Instagram Pinterest
    LiveHealthNews
    • Health

      Medicaid Is Preferred Here – The Atlantic

      Harvard’s Public-Health School Is on Life Support

      The Cleaner Way to Get Ripped

      Jared Polis Is the MAHA Democrat

      The CDC’s Weekend of Whiplash

    • Lifestyle

      Despite The Pain, God Is Still Writing Joy Into Your Story

      Got Persistent Bacterial Vaginosis? This New Treatment Approach May Help

      Sanity Daily On Josh Talks Hindi

      Your Sin Does Not Define Your Worth

      10 Holistic Self-care Routines For Women

    • Wellness

      Nordstrom Anniversary Sale 2023 Picks!

      Why and How To Develop a Daily Writing Routine

      How Long Should You Workout a Day?

      I Tried Journaling in the Morning for 30 Days

      What Is the Best Time To Walk During the Day?

    • Beauty

      Homemade Herbal Lip Balm

      Why an Essence Toner Deserves a Spot in Your Routine

      Exactly How Your Skin Changes in Your 40s, 50s, and 60s

      Is It a Terrible Idea to Get Botox at a Medi-spa?

      Do Biotin Supplements Actually Do Anything for Hair Loss?

    • Fitness

      What Is HIIT—and How Can It Boost Your Workouts?

      Why the Norwegian 4×4 Workout Is Everywhere Right Now

      Anaerobic training for endurance athletes

      Kim Kardashian NikeSKIMS: Inside Her Vision for the New Activewear Brand

      10 Pushing Exercises to Light Up Your Shoulders, Chest, and Triceps

    • Weight Loss

      Red Light Therapy at Home: Device Guide & Best Use Tips

      Unlocking Emotional and Physical Healing Through Body Awareness with Rachel Reimer

      10 great pre-workout snacks – The Fitnessista

      High Protein Chipotle Bowl Recipe

      Staying Fit While Traveling: My Go-To Workouts + Tips

    • Garden

      13 Dark and Moody Succulents for Indoor Planters

      How to Plant and Grow Juniper

      13 Easy and Delicious Squash Varieties to Grow in the Home Garden

      How to Plant, Grow, and Care for ‘Autumn Bonfire’ Azalea

      How to Cut Back Hardy Hibiscus Plants for Winter

    LiveHealthNews
    Home » How to Identify and Manage Common Sunflower Diseases
    Garden

    How to Identify and Manage Common Sunflower Diseases

    Share Facebook Twitter Pinterest WhatsApp
    How to Identify and Manage Common Sunflower Diseases
    Share
    Facebook Twitter Pinterest WhatsApp

    A vertical close up of a sunflower bouquet. Green and white text span the center and bottom of the frame.

    Sunflowers, Helianthus annuus, are annuals within the Asteraceae household appropriate for cultivation in Zones 2 to 11.

    Whether or not you develop them for his or her decorative worth or the edible seeds, these flowers are a vivid and sunny addition to your backyard.

    When supplied with optimum rising circumstances, these lovely and vibrant flowers aren’t vulnerable to many plant ailments, however you’ll must know what to search for if pathogens do come to go to.

    A horizontal photo of three sunflower heads in full bloom growing in the garden pictured on a soft focus background.

    We hyperlink to distributors that will help you discover related merchandise. In the event you purchase from one in all our hyperlinks, we might earn a fee.

    In our information to rising sunflowers, we cowl learn how to plant and take care of Helianthus.

    Whether or not you’re rising cute little teddy bear sorts or black oil sunflowers for the birds, this text will talk about seven frequent ailments that may wreck the floral show.

    Right here’s the lineup:

    7 Frequent Sunflower Illnesses

    1. Alternaria Leaf Blight

    Attributable to the fungal species Alternaria helianthi or A. zinniae, Alternaria leaf blight is most probably to seem in heat, humid circumstances, particularly after rain as moisture is a primary driver of illness improvement.

    Contaminated specimens will exhibit small, darkish, typically yellow-ringed spots on the foliage, usually alongside the margins or in the direction of the leaf ideas.

    The spots will ultimately merge and develop in dimension, ultimately masking the vast majority of a leaf. In time, contaminated specimens will lose their leaves – typically the decrease leaves first – and ultimately die.

    A vertical close up photo of alternaria leaf blight on a Helianthus leaf.
    Photograph credit score: Thirunarayanan Perumal, Banaras Hindu College, Bugwood.org

    The pathogens can unfold by way of wind or splashing water, be seedborne, survive in weed hosts, and overwinter in crop detritus or the soil. And even when an contaminated sunflower doesn’t die, having blighted foliage received’t assist a sunflower to develop its beautiful blooms.

    Sustaining applicable spacing to advertise ample air circulation, pruning symptomatic foliage, and watering at soil degree might help curb the unfold.

    If a majority of your crops are contaminated, you’ll want to tug them up and get rid of them within the trash, not on the compost pile.

    In the event you’re rising sunflowers as a canopy crop, within the case of an infection ensure you rotate your crops and don’t plant Helianthus in the identical spot for 2 to 3 years.

    2. Downy Mildew

    Many various species can undergo from quite a lot of completely different mildews, however this taste of downy mildew – brought on by the fungus Plasmopara halstedi – is definitely distinctive to Helianthus.

    Able to surviving in soil for as much as a decade, P. halstedi thrives in cool temperatures, excessive humidity, and waterlogged circumstances.

    If these circumstances are current throughout seed germination and seedling emergence, younger specimens grow to be contaminated and normally die shortly.

    A horizontal close up of a sunflower head suffering from an infection of downy mildew.

    If these juveniles make it to maturity, they’ll lack vigor and customarily exhibit chlorotic leaves with white cottony progress on the undersides. If contaminated crops don’t die, they’ll undergo from stunted progress and lowered seed set.

    Rising resistant sunflower varieties and buying licensed disease-free seed might help you keep away from an infection.

    Foliar fungicides received’t do a lot, although. In case your crops are contaminated, take away and get rid of these specimens within the trash.

    3. Phoma Black Stem

    Also called Phoma blight, Phoma black stem has one very apparent symptom – I’m certain you’ll be able to work out what it’s.

    This illness is brought on by the fungus Phoma macdonadlii, which survives in seeds or on contaminated crop residue and is unfold by bugs reminiscent of sunflower stem weevils, Apion occidentale.

    And as with many fungal circumstances, moist climate promotes the event of this illness.

    A vertical photo of a field of Helianthus dying as a result of infection of phoma black stem.
    Photograph Credit score: Howard F. Schwartz, Colorado State College, Bugwood.org

    As soon as contaminated, the plant will exhibit one- to two-inch black lesions on the stems. Extra darkish spots can present up on the foliage and flowers, the complete plant can droop and dry up, and flowers can die.

    Cleansing up plant residue at season’s finish, rising hybrid species, and rotating your sunflowers each three years might help keep away from this illness, together with managing the native pest populations.

    Fungicides received’t do a lot for management, so it’s greatest to take away and pitch contaminated specimens.

    Keep away from planting sunflowers in the identical location the next season.

    4. Phomopsis Stem Canker

    This illness will be simply confused with Phoma black stem, for a number of causes.

    Attributable to fungal species within the Diaporthe genus, the pathogens overwinter in plant particles. An infection normally happens throughout moist circumstances like moist climate and excessive humidity.

    And it additionally produces gnarly stem lesions – though they’re bigger than these of Phoma black stem, and brown in coloration fairly than black.

    Contaminated foliage will develop small brown spots, which ultimately merge into giant brown sections of foliar decay. Along with trying nasty, contaminated specimens are fast to wilt and die.

    To stop this illness, guarantee ample airflow between crops, clear up crop detritus, rotate your plantings, and should you’ve had an issue prior to now, select resistant hybrids.

    For management, you should utilize copper fungicide when the flower heads have simply shaped. In any other case, take away and destroy severely symptomatic crops.

    As soon as once more, keep away from planting sunflowers in the identical spot the next season and select one thing that doesn’t play host to those pathogens, like wheat or corn.

    5. Powdery Mildew

    Surviving as mycelium in plant detritus, the fungal pathogen Erysiphe cichoracearum spreads by way of wind or splashing water to new, uninfected foliage.

    An infection and illness improvement is most probably in humid climate, but whereas the foliage stays dry.

    A horizontal close up photo of powdery mildew on foliage.

    The principle symptom is leaves coated with a whitish-gray powder. Moreover, foliage may develop small, black specks of spore-producing cleistothecia, which can solely move the issue onto different specimens.

    Fortunately, this situation is generally a beauty challenge, as infections aren’t normally deadly.

    To stop powdery mildew, guarantee your sunflowers have full solar publicity and you’ll want to house them aside to permit for enough air circulation.

    Trim away symptomatic leaves as you discover them, and seek the advice of our information to study extra about learn how to handle powdery mildew.

    6. Rust

    Puccinia helianthi is the fungal species that causes rust in sunflowers.

    The pathogen survives in lifeless and decaying plant matter over the winter and assaults your sunflowers when they’re moist from precipitation or irrigation.

    A horizontal close up of a leaf with symptoms of rust.

    Contaminated sunflowers will exhibit rust-colored, yellow-ringed growths on the foliage which produce spores that unfold by way of wind to different crops. If an infection is extreme sufficient, defoliation can happen.

    If signs are extreme, pulling up and disposing of contaminated crops could also be your best choice.

    7. Septoria Leaf Spot

    Septoria leaf spot illness is brought on by the fungus Septoria helianthi.

    This illness tends to develop shortly in heat circumstances and in instances of excessive rainfall. The pathogen is mostly unfold by way of splashing water, and overwinters in plant residue.

    A vertical close up of septoria leafspot on the bottom of a leaf.

    Signs embrace water-soaked, rounded greenish-gray lesions on the foliage, that are normally ringed with chlorotic tissue.

    In time, small spore-producing spots will even type on the undersides of leaves, and contaminated crops may develop a sad-looking, watery wilt earlier than they die.

    Diseased foliage results in lowered photosynthesis, which ends up in lowered progress.

    To stop Septoria leaf spot, rotate your plantings each three years not less than, keep away from splashing the leaves with water once you irrigate, and buy licensed disease-free seed.

    Cleansing up plant detritus on the finish of the season denies the pathogen a spot to overwinter. In case your crops are contaminated, pull them up and get rid of them within the trash.

    Well being Is Wealth, Y’all

    It’s true for folks, and it’s true for sunflowers.

    Most of those ailments will be averted by rising these annuals in a full solar location, sustaining ample airflow between crops, and watering at soil degree as a substitute of from overhead.

    At season’s finish, clear up beds and borders to forestall disease-causing pathogens from overwintering in lifeless plant tissue.

    A horizontal photo of two yellow sunflowers growing in the garden pictured in bright sunshine on a soft focus background.

    Are you rising sunflowers and have yours suffered from any of those ailments? Tell us within the feedback part beneath!

    And for extra details about rising sunflowers in your backyard, learn these guides subsequent:

    © Ask the Consultants, LLC. ALL RIGHTS RESERVED. See our TOS for extra particulars. Uncredited photographs: Shutterstock.

    What's Your Reaction?

    • OMGOMG
      0
      OMG
    • LOVELOVE
      0
      LOVE
    • CuteCute
      0
      Cute

    Share. Facebook Twitter Pinterest WhatsApp
    Previous ArticleBentonite Clay Benefits and How to Use It
    Next Article When a Guy Likes You… You Just Need To Exist

    Related Posts

    Garden

    13 Dark and Moody Succulents for Indoor Planters

    Garden

    How to Plant and Grow Juniper

    Garden

    13 Easy and Delicious Squash Varieties to Grow in the Home Garden

    Garden

    How to Plant, Grow, and Care for ‘Autumn Bonfire’ Azalea

    Garden

    How to Cut Back Hardy Hibiscus Plants for Winter

    Garden

    How to Grow Money Tree Plants (Pachira)

    Garden

    Why Aren’t my Mums Blooming? 7 Fixes to Try

    Garden

    Protect Your Vines from Freezing and Frost

    Add A Comment
    Leave A Reply Cancel Reply

    Good Deal
    Don't Miss
    Fitness

    How To Find The Best Place To Inject Mounjaro For Weight Loss

    You’ve determined to start out a weight reduction program however aren’t positive the place to…

    174: If I were considering Ozempic, here’s what I would do first

    How to Plant, Grow, and Care for Daylilies

    The Story of Squash: What’s In A Name?

    19 Evergreen Trees and Shrubs That Thrive in the Shade

    May You Like This

    LiveHealthNews is a Professional Health & Lifestyle Blog. Here we will provide you with only exciting content that you will enjoy and find useful. We’re working to turn our passion into a successful website. We hope you enjoy our Content as much as we enjoy offering them to you.

    Facebook X (Twitter) Instagram Pinterest
    Categories
    • Beauty (230)
    • Fitness (802)
    • Garden (1,539)
    • Health (1,223)
    • Lifestyle (1,118)
    • Weight Loss (951)
    • Wellness (150)
    Most Popular
    Health

    The Conjoined Twins Who Refused to Be ‘Fixed’

    Garden

    How to Plant a Clover Lawn in 7 Easy Steps

    Health

    The Technology That’s Remaking OU Health into a Top-Tier Medical Center

    © 2025 LiveHealthNews.
    • Home
    • About Us
    • Contact us
    • Privacy Policy
    • Terms & Conditions

    Type above and press Enter to search. Press Esc to cancel.

    Ad Blocker Enabled!
    Ad Blocker Enabled!
    Our website is made possible by displaying online advertisements to our visitors. Please support us by disabling your Ad Blocker.