What are the widespread and serious diseases of rose?
Black spot, powdery mildew, stem canker, ghost spotting, rust, root rot, dieback, and botrytis blight. RIGHT?
You might be wondering,
All the diseases are caused by fungus. So, Controlling fungus disease means to control most of the rose diseases. I know that’s why you are finding the best fungicidal spray for your roses.
You should remember, the wrong pick of fungicide, irregular application schedule, and fungicide dosage error can burn your rose bushes. Don’t worry. Here’s a solution.
In this article, I have listed and reviewed the 7 best fungicides for roses that you may pick without any hesitation, and for your convenience, also have added fungicide application guide and schedule.
In a hurry? Here is the overall best fungicide for roses that you may pick right now-
The 7 Best Fungicide for Roses Today-List
- Southern Ag – Liquid Copper Fungicide -Best for prevent rose disease
- Garden Safe Brand Fungicide3
- Bonide 811 Copper 4E Fungicide–Best overall
- Bayer Advanced 701250 Disease Control for Rose, Flower and Shrubs Concentrate
- Dr. Earth 8007 Ready to Use Disease Control Fungicide
- Serenad e Garden AGRSER32 Disease Control Effective Organic Fungicide
- Spectracide 100507462 Immunox Multi-Purpose Fungicide Spray –Best for cure rose disease
Best Fungicide for Roses- Reviews
1.Southern Ag – Liquid Copper Fungicide
Do you know how copper kills fungus on your roses?
When you spray this copper fungicide on roses, the suspension of copper will be dry and gradually release copper ions when the leaves and stems become wet. If the fungus attacks the plant surface, the copper ion protects them to develop.
According to the research of Cornell University, The best fungicide contains more than 20 % copper substance as an active ingredient.
Southern Ag has 31.4% of copper substances which is equivalent to 8% of metallic copper.
This fungicide can control most of the fungal diseases of roses including rust, leaf spots, blight, and powdery mildew. Moreover, it can also control some bacterial diseases such as crown gall of roses.
Now the question;
Is the copper fungicide organic? Yes! Copper is marked as an organic product in many organizations. But sadly speaking this fungicide is not OMRI listed.
To get diseases free rose bushes-
Mix 4-6 tablespoon (2-3 oz.) of concentration per gallon of water. Pour the solution into a sprayer and apply it on the foliage of the rose plants to prevent and control fungal diseases.
2. Garden Safe Brand Fungicide 3
There is no disease that can transmit without any bearer. In the case of fungal disease, the disease can transmit fast through the insect.
But Garden Safe fungicide also acts as an insecticide & miticide and this the best part of this fungicide.
If you find a fungicide for your roses that is completely safe for your children and pets, this triple-action fungicide for you. This is an OMRI certified organic fungicide for roses and the active ingredient of this fungicide is neem oil.
This chemical-free fungicide helps your roses to keep away from powdery mildew, rust, black spots, anthracnose, blight, and other fungal diseases as well as killing aphids, scales, caterpillars, beetles, whiteflies, mealy bugs, spider mites, and so on.
Just shake well and spray on your plant leaves for rose fungus treatment with this Ready to Use (RTU) best all-around fungicide. It may also be the best for knockout roses, desert rose, and other indoor, outdoor plants.
3. Bonide 811 Copper 4E Fungicide
Let’s talk directly about the Bonide 811 fungicide.
This fungicide concentration contains 10% copper octanoate or copper soap as an active ingredient and the copper octanoate is occurring naturally that is certified by OMRI this time.
It can prevent and control powdery mildew, downy mildew, black spot, peach leaf curl, rust, stem canker, dieback, botrytis blight, and other fungal diseases of roses.
Moreover, this fungicide also can kill some insects and control some bacterial diseases. Many gardeners say this fungicide special emphasizes on control the rose disease.
In my opinion, this is the best fungicide for powdery mildew and black spots on roses. Wait! Don’t get me wrong. It also controls and prevents other fungal diseases. But controlling powdery mildew and black spot effectively on roses is the specialty of this fungicide.
To control black spot of roses, mix 3 tablespoons (15 ml) of concentration per gallon of water and spray the solution on the rose foliage. But mix 2 tablespoons (10 ml) concentration to control powdery mildew.
Both solutions also can be used for other fungal diseases of roses. Moreover, read the label before use.
4. Bayer Advanced 701250 Fungicide Concentrate for Rose
This fungicide provides 3-way protection to the roses. Firstly, it kills instantly the existing fungus. Secondly, forms a protective barrier on the surface of the plants. Lastly, the plant can absorb this fungicide and keep up to 2 weeks for future protection.
The active ingredient of this fungicide is 2.90% tebuconazole. Tebuconazole is a triazole fungicide that is used to treat pathogenic fungi of roses. And also the U.S. Food and Drug Administration marked this fungicide safe for humans.
It can control and prevent most of the fungal disease of roses but It may be the best for black spot, powdery mildew, and the rust of roses.
Do you know what the best part of this fungicide is?
It is a systemic and rainproof fungicide. It doesn’t wash out from the leaves if dries once and this 32 oz concentrate can treat 250 bushes approx.
To prevent rose diseases-
Mix 1 tablespoon of concentration per gallon of water and apply once per 14 days interval during the growing season when the first 5-6 true leaves appear.
And to control the rose diseases, apply on the roses when the first sign appears. Repeat the application after 14 days. Three applications are enough but sometimes it takes more.
5. Dr. Earth 8007 RTU Disease Control Fungicide
Rosemary oil, cloves, clove oil, peppermint oil, and malic acid are the active ingredients of this fungicide. See, each of the ingredients may be in your kitchen. More it contains 13 other inert ingredients.
All the natural ingredients are blend in such a way that the fungicide provides optimal pathogen killing power. Besides, it supplies different multi-minerals to help the rose plant to heal the foliage disease-damaged.
Can I be totally honest with you?
It works better in potted indoor roses than outdoor rose bushes. It is a lazy white color liquid fungicide and has a rosemary smell. Yes! You read that right. It doesn’t have any harsh smell. That’s why it is the best fungicide for indoor roses.
It can control almost all the fungal diseases and give extra protection to keep the insects away from rose plants for a week. Moreover, it also the best fungicide for shrubs, trees, vegetables, and lawns.
To apply the ready-to-use fungicide on the roses, shake it well and spray on the vegetative parts of the plants.
6. Serenade Garden AGRSER32 Fungicide
Bio fungicide is the fungicide that controls pathogenic fungus by the beneficial bacteria or fungus and this fungicide contains Bacillus subtilis bacteria as an active ingredient.
It is beneficial bacteria that can control most fungal diseases and some bacterial diseases of roses, especially powdery mildew, rust, gray mold (Botrytis blight), and bacterial spots.
The best part of the bio fungicide is-
After spraying the fungicide, the Bacillus subtilis continue to live on the root system of your rose. They form spores and multiply that provide protection throughout the growing season of rose. Also, this fungicide provides some plant food and antibiotics to roses.
If you find the best organic bio fungicide for your rose bushes and other plants, Serenade Garden AGRSER32 fungicide for you, and it is also approved by OMRI for organic gardening.
Mix 4 tablespoons of fungicide concentration per gallon of water and spray on all the foliar parts of your rose to control and prevent fungal disease.
7. Spectracide 100507462 Immunox Multi-Purpose Fungicide
After a tight schedule, It was a beautiful morning. You were walking in the garden with a full cup of coffee. Suddenly, you noticed that black patches or powdery substances are developing on the leaves of your roses.
I know the feeling. Now you need the best fungicide for your roses that works instantly and this is the instant working powerful fungicide for you.
Myclobutanil triazole is the active ingredient of this fungicide. It can cure and prevent all the major fungal diseases on roses.
Rainproof-ness is another praiseworthy feature of this fungicide. It doesn’t wash off by rain after drying once. It is a chemical fungicide but super effective. Not recommended for organic gardening.
Mix 2 tablespoons concentrate per gallon of water, apply the solution on the roses and get beautiful disease-free healthy plants and blooms.
How often Apply Fungicide on Roses?
You know, most fungicides work well in the early stage. If the fungus develops on the surface of the rose leaves, the fungicide can’t kill them successfully. Because most of the fungicide can’t work if the fungus goes inside the tissue of the leaves. That’s why it is really a crucial part to know when to apply fungicide on roses.
According to the experts, You should start applying fungicide ONCE per 14-15 days in the growing season after few leaves emerge and shorten the interval during the rainy season. Apply once per 5-7 days.
Remember excess water is the main culprit of developing fungus. For your help, I have discussed the watering schedule below. Keep reading.
What happens if the black spots or other fungal infection signs already appeared?
Don’t waste time. Apply fungicide as soon as possible the first sign appears. Generally, 2 tablespoons per gallon water is enough for control and prevent diseases of roses. Thereafter, it is a wise idea to read the label of the fungicide to know the specific dosage and schedule.
Do you remember, I promised? Watering schedule?
Watch the video to learn Bill Elzey’s statement about rose watering and fungal disease. For those who don’t know who he is, Bill Elzey is the owner and manager of Showplace Lawns in Austin, Texas.
Best Time of Day to Spray Fungicide on Roses?
Sometimes gardeners claim that the fungicide burns the rose leaves. It happens for phytotoxicity. Harsh but true, the fungicide may be the cause of phytotoxicity.
Applying fungicide in sunny, hot weather increases the chance of leaves burning. To get rid of phytotoxicity, you have to know the best time to spray fungicide on roses.
Early morning or early evening is the best time to apply fungicide on roses. This time, the weather remains cool, windless and the activity of plants is less. But if you want to spray fungicide in the early evening, consider that the fungicide gets enough time for drying.
How to Apply Fungicide on Roses?
Fungicide can be the cause of skin itching, allergy, breathing problem, and eye damage. So wear safety equipment first. Then follow the steps-
- Prepare the solution according to the manufacturer’s directions.
- Put the solution into a sprayer.
- Spray clean water on the plant thoroughly.
- Shake the solution and spray the leaves(both sides of the leaves).
Homemade Fungicide for Roses
Baking soda is a natural antifungal product that kills fungus immediately. Follow the simple steps to make fungicide with baking soda-
Mix 5 grams of baking soda in 1-liter water and 1 teaspoon liquid soap.Boom! preventive DIY fungicide is ready for your roses. This fungicide is best for powdery mildew of roses.
Insecticidal soap is mainly used to kill soft-bodied insects. It contains potassium hydroxide that also acts as a fungicide. Insecticidal soap is readily available in the market(see the insecticidal soap review) and you can also make the soap water spray at home.
Want to know the best part of the neem oil? It is the best homemade remedy for black spots and rust on roses.
Also, you may be happy to know that-
Neem oil is a versatile product for organic gardeners. It can be used as insecticide and fungicide. Ready to use neem oil spray available in the market today. You can also use household neem oil for making a rose fungicide.
Milk or Milk Powder
Mix ½ liter milk with 1 gallon of water and spray the fungicide on the leaves of your roses. It is also best for powdery mildew and some other rose diseases like leaf spots and rust.
Vinegar, sulfur, and some other household ingredients can be used as a natural fungicide for roses. If you are not satisfied, check this article for more details- Natural Remedies for Rose Diseases: Mildew, Rust, Black Spot, Canker
#What is systemic fungicide?
Systemic fungicide is the type of fungicide that absorbed by the xylem tissue of plants. Want to know the main difference between contact and systemic fungicide?
Contact fungicide only works on the place where it sprays but systemic fungicide redistributes to the whole plants by plant tissue and protects the whole plants.
Both have some advantages and disadvantages. But contact insecticide is most recommended. Just consider while spraying that the whole plant wet completely and don’t wash by rain.
#what is the best fungicide for roses?
The organic, synthetic, or systemic type fungicide that has powerful fungicidal properties such as copper substances, neem oil, Myclobutanil, Bacillus subtitles, Tebuconazole, and some other organic and chemical fungus killing substances.
Ready to Use and concentrate fungicide is available for roses in the market today. Ready to Use fungicide comes with hand trigger and no need to pre-mixed.In contrast, concentrate fungicide needs to dilute before spraying.
#How do fungicides work?
Different fungicide has different mode of actions. Actually the mode of action of fungicide depends on the active ingredient of the fungicide. Most of the fungicide kills fungus by damaging the cell membrane of fungus or inactivating some crucial processes of fungi such as protein synthesis, enzyme synthesis, energy production, and respiration.
You probably understand that the rose disease means fungal disease and prevention is the rules of thumb to get rid of fungus on roses. Moreover, Good care with the perfect rose food is also necessary to get a disease-free, healthy rose.
I hope you will find the best fungicide for roses. Follow the directions, apply on your roses in the growing season, make your neighbors jealous with beautiful and healthy blooms.