Selecting the best fungicide for pumpkins involves understanding the specific diseases affecting your plants and choosing products with appropriate modes of action.

Maintaining healthy pumpkin crops requires fungicides for effective disease management, particularly against fungal infections that can devastate yields.

Whether you’re growing heirloom varieties like Musquee de Provence or commercial favorites like Jack-O’-Lantern, applying the right fungicide at the right time can prevent devastating losses.

This comprehensive guide explores the top 20 best fungicides for pumpkins, covering systemic, contact, organic, and broad-spectrum options. We analyze each fungicide brand’s active ingredients, application rates, and effectiveness in controlling specific pumpkin diseases.

Related: Best Herbicide For Pumpkins

20 Best Fungicide For Pumpkins

1. Bravo Weather Stik – Best Systemic Fungicide for Pumpkins

Bravo Weather Stik is a systemic fungicide containing 54% chlorothalonil, designed to combat a wide range of fungal diseases in pumpkins. Its systemic action ensures thorough internal protection, effectively managing issues like powdery mildew and downy mildew. The formulation adheres well to plant surfaces, providing long-lasting defense even under adverse weather conditions.

This pumpkin fungicide is suitable for various pumpkin varieties, including Jack-o’-Lanterns and Sugar Pumpkins, with application rates typically around 2 to 3 pints per acre. Regular use throughout the growing season can significantly reduce disease incidence, promoting healthier vines and improved yields. Growers appreciate its reliability and broad-spectrum efficacy in maintaining pumpkin health.

Pros:

• Broad-spectrum control
• Long-lasting protection
• Weather-resistant formulation
• Suitable for multiple varieties
• Systemic action
• Easy application
• Enhances yield

Cons:

• Protective gear required
• Potential for resistance
• Not organic

2. Daconil Fungicide – Contact Fungicide for Pumpkin Disease Control

Daconil Fungicide, with 29.6% chlorothalonil, serves as an effective contact fungicide for managing pumpkin diseases. It creates a protective barrier on plant surfaces, preventing fungal spores from establishing and proliferating. This fungicide is particularly effective against leaf spots, blights, and mildews common in pumpkin cultivation.

For optimal results, apply Daconil at a rate of 1.5 teaspoons per gallon of water, ensuring thorough coverage of all plant parts. It’s suitable for various pumpkin types, including Miniature and Pie Pumpkins. Regular applications every 7 to 10 days can help maintain plant health and vigor, especially during periods conducive to disease development.

Pros:

• Prevents spore germination
• Broad-spectrum efficacy
• Easy to mix
• Visible residue for coverage
• Cost-effective
• Readily available
• User-friendly

Cons:

• Requires frequent application
• Not rainfast
• Protective equipment needed

3. Mancozeb Flowable with Zinc – Best Protectant Fungicide for Pumpkins

Mancozeb Flowable with Zinc combines 37% mancozeb and 1.1% zinc, offering preventive action against a spectrum of fungal pathogens affecting pumpkins. This protectant fungicide inhibits spore germination, effectively managing diseases like downy mildew and anthracnose. The added zinc promotes robust plant growth, enhancing the plant’s natural defenses.

Application rates vary by pumpkin variety; for instance, applying 2 to 3 teaspoons per gallon of water is recommended for larger varieties like Atlantic Giant Pumpkins. Regular applications every 7 to 10 days, especially during humid conditions, can prevent disease onset and support healthy foliage. Growers value its dual action of disease prevention and nutritional support.

Pros:

• Preventive action
• Enhances plant health
• Multi-disease control
• Zinc supplementation
• Cost-effective
• Easy application
• Reduces resistance risk

Cons:

• Not curative
• Requires reapplication
• Protective gear needed

4. Pristine Fungicide – Curative Fungicide for Pumpkins

Pristine Fungicide features a dual-action formula with 12.8% boscalid and 25.2% pyraclostrobin, making it effective for both curative and preventive disease management in pumpkins. It targets existing infections and safeguards against new ones, addressing issues like powdery mildew and gummy stem blight. Its translaminar movement ensures comprehensive leaf protection.

For optimal results, apply Pristine at a rate of 10 to 18 ounces per acre, adjusting based on pumpkin variety and disease pressure. It’s particularly beneficial for susceptible varieties such as Cinderella and Fairytale Pumpkins. Regular use as part of a rotational program can enhance disease control and prolong the effectiveness of fungicide applications.

Pros:

• Dual-action control
• Translaminar movement
• Effective on resistant strains
• Broad-spectrum efficacy
• Enhances yield quality
• Rainfast properties
• Versatile application

Cons:

• Higher cost
• Resistance management needed
• Not organic

5. Serenade Garden Fungicide – Fungicides with Preventive Action for Pumpkins

Serenade Garden Fungicide utilizes Bacillus subtilis, a beneficial bacterium, to provide preventive action against fungal diseases in pumpkins. This bio-fungicide disrupts pathogen growth, effectively managing powdery mildew, leaf spots, and rusts. It’s an excellent choice for organic growers seeking environmentally friendly disease control solutions.

Application involves mixing 2 to 4 fluid ounces per gallon of water, suitable for all pumpkin varieties, including ornamental types like Baby Boo and Jack Be Little. Regular applications every 7 days can help maintain disease-free foliage and promote vigorous growth. Users appreciate its safety for beneficial insects and its role in sustainable agriculture.

Pros:

• Organic-approved
• Safe for beneficials
• Prevents multiple diseases
• Easy to apply
• Environmentally friendly
• No re-entry interval
• Non-toxic

Cons:

• Preventive only
• Requires frequent application
• Short residual effect

6. Ridomil Gold SL – Best Fungicide for Pumpkins with Multisite Activity

Ridomil Gold SL contains 45.3% mefenoxam, offering multisite activity against soilborne and foliar pathogens in pumpkins. It’s particularly effective against Pythium and Phytophthora species, which cause root and fruit rots. Its systemic properties allow for upward movement within the plant, providing comprehensive protection.

For soil applications, use 1 to 2 pints per acre, while foliar applications require 1 to 2 pints per 100 gallons of water. This fungicide is suitable for all pumpkin varieties, including specialty types like Blue Hubbard and Kabocha. Incorporating Ridomil Gold SL into your disease management program can significantly reduce losses from root and fruit rot diseases.

Pros:

• Systemic protection
• Targets multiple pathogens
• Soil and foliar use
• Long residual activity
• Enhances root health
• Reduces crop loss
• Versatile application

Cons:

• Potential resistance
• Not for organic use
• Protective gear required

7. Quintec Fungicide – Single-Site Fungicide for Pumpkin Powdery Mildew

Quintec Fungicide, with 22.58% quinoxyfen, is a single-site fungicide specifically targeting powdery mildew in pumpkins. It inhibits spore germination and mycelial growth, providing effective control of this common foliar disease. Its unique mode of action makes it a valuable tool in resistance management strategies.

Apply Quintec at a rate of 4 to 6 fluid ounces per acre, ensuring thorough coverage of foliage. It’s suitable for all pumpkin varieties, including heirloom types like Long Island Cheese and Musquee de Provence. Regular applications every 10 to 14 days can maintain healthy leaves and support optimal photosynthesis.

Pros:

• Targeted action
• Effective control
• Resistance management

• Long residual effect
• Rainfast properties
• Enhances plant vigor
• Easy to mix
• Suitable for multiple varieties

Cons:

• Not organic
• Requires rotation to prevent resistance
• Limited to powdery mildew control

---

8. Cabrio EG Fungicide – Best Fungicide for Broad-Spectrum Disease Control

Cabrio EG Fungicide contains 20% pyraclostrobin, a strobilurin fungicide that provides broad-spectrum control against multiple pumpkin diseases, including powdery mildew, anthracnose, and gummy stem blight. It works by inhibiting fungal respiration, effectively stopping disease progression.

Apply Cabrio EG at a rate of 8 to 12 ounces per acre, depending on disease pressure. It is suitable for various pumpkin types, including Jarrahdale and Big Max. Regular applications at 7 to 14-day intervals help maintain disease-free foliage and support fruit development.

Pros:

• Broad-spectrum control
• Preventive and curative action
• Enhances yield potential
• Rainfast within hours
• Easy application

Cons:

• Can lead to resistance if overused
• Requires rotation with other fungicides
• Not certified organic

---

9. Regalia Biofungicide – Organic Systemic Fungicide for Pumpkins

Regalia Biofungicide is a plant extract-based fungicide derived from Reynoutria sachalinensis, offering organic systemic protection against fungal diseases like powdery mildew, downy mildew, and leaf spots. It enhances the plant’s natural defense mechanisms, reducing disease susceptibility.

Mix 1 to 4 tablespoons per gallon of water and apply every 7 to 10 days, covering all plant parts. It’s an excellent option for organic pumpkin farming, especially for varieties like Baby Pam and Lumina.

Pros:

• OMRI-listed for organic use
• Boosts plant immunity
• No harmful residues
• Safe for pollinators and beneficial insects
• Can be used with other organic treatments

Cons:

• Preventive only, not curative
• Requires frequent application
• Less effective under heavy disease pressure

---

10. Inspire Super Fungicide – Dual-Mode Action for Pumpkin Disease Control

Inspire Super Fungicide combines 7.4% difenoconazole and 9.3% cyprodinil, providing dual-action disease control against leaf spots, powdery mildew, and black rot. It penetrates plant tissues, stopping disease spread while offering long-lasting protection.

Apply at a rate of 16 to 20 fluid ounces per acre, covering foliage thoroughly. It’s suitable for commercial growers cultivating varieties like Howden and Casper.

Pros:

• Dual-action systemic control
• Effective against resistant strains
• Long residual protection
• Rainfast within hours
• Improves fruit quality

Cons:

• Not organic
• Requires protective equipment
• Can be expensive

11. Pristine Fungicide – Broad-Spectrum Disease Control for Pumpkins
Pristine Fungicide combines boscalid and pyraclostrobin, providing broad-spectrum disease protection. It effectively controls powdery mildew, downy mildew, and Alternaria leaf spot, ensuring healthy pumpkin crops. The dual-mode action enhances plant health and boosts yield potential.

It is applied at a rate of 10 to 18 ounces per acre, offering long-lasting residual protection. The formula is rainfast within hours, making it ideal for unpredictable weather conditions. Growers cultivating varieties like Jack O’Lantern and Atlantic Giant benefit from its consistent disease control.

Users appreciate its ability to manage fungicide-resistant strains while promoting strong plant growth. The systemic action ensures deep penetration into plant tissues for comprehensive protection. For those seeking a dependable fungicide, Pristine stands out as an excellent option.

Pros:

• Dual-mode action
• Broad-spectrum control
• Long residual effect
• Rainfast quickly
• Effective on resistant strains
• Enhances fruit quality
• Boosts yield

Cons:

• Not organic
• Expensive option
• Requires PPE

---

12. Cabrio EG Fungicide – Strobilurin-Based Protection for Pumpkins
Cabrio EG Fungicide contains pyraclostrobin, a strobilurin-class fungicide with systemic and protective properties. It controls common pumpkin diseases like powdery mildew, black rot, and gummy stem blight. The formula provides long-lasting disease suppression while improving plant vitality.

Apply at a rate of 12 to 16 ounces per acre, covering all leaf surfaces thoroughly. It penetrates plant tissues, ensuring comprehensive disease management. The rainfast formula enhances its reliability during wet conditions.

Users report improved pumpkin yield and better fruit quality with Cabrio EG. The fungicide’s preventative and curative properties make it a preferred choice for growers. It is suitable for commercial and backyard pumpkin farming.

Pros:

• Systemic protection
• Long-lasting action
• Fast rainfastness
• Works on resistant strains
• Enhances yield
• Easy to mix
• Improves plant vigor

Cons:

• Not organic
• Requires PPE
• Costly for small farms

---

13. Bravo Weather Stik – Chlorothalonil-Based Fungicide for Pumpkins
Bravo Weather Stik features chlorothalonil, offering broad-spectrum protection against fungal diseases. It controls downy mildew, leaf blight, and anthracnose, reducing disease spread. The protective barrier prevents fungal spores from establishing on leaves and stems.

Apply at 1.5 to 2.5 pints per acre for optimal coverage and performance. The weather-resistant formula adheres to plant surfaces, ensuring lasting protection. It is highly effective in humid or rainy climates where disease pressure is high.

Farmers appreciate Bravo Weather Stik for its reliable disease prevention. The multi-site action minimizes resistance risks, making it a valuable tool for rotation programs. It is ideal for both small and large-scale pumpkin growers.

Pros:

• Broad-spectrum control
• Prevents resistance buildup
• Strong weather resistance
• Long residual activity
• Safe for most crops
• Works in humid climates
• Easy to apply

Cons:

• Not systemic
• Needs frequent reapplication
• Requires careful handling

---

14. Flint Fungicide – Trifloxystrobin for Pumpkin Disease Defense
Flint Fungicide contains trifloxystrobin, offering strong protection against powdery mildew and leaf spot diseases. It provides preventative and curative control, stopping infections before they spread. The translaminar action ensures deep penetration into leaf tissues.

Apply at 2 to 4 ounces per acre for effective disease management. It enhances photosynthesis, leading to improved plant vigor and fruit quality. The rainfast feature ensures lasting protection even after heavy rainfall.

Growers trust Flint Fungicide for its effectiveness against resistant fungal strains. Its fast-acting formula keeps pumpkins healthy throughout the growing season. It is ideal for both commercial and home garden use.

Pros:

• Translaminar action
• Preventative and curative
• Rainfast quickly
• Stops resistant strains
• Boosts plant health
• Enhances fruit color
• Easy to mix

Cons:

• Not organic
• Needs frequent rotation
• Requires protective gear

---

15. ProPhyt Fungicide – Phosphite-Based Systemic Protection
ProPhyt Fungicide uses potassium phosphite to deliver systemic protection against fungal and bacterial diseases. It strengthens plant immune responses, reducing infection risks. The formula is ideal for managing downy mildew and Phytophthora blight in pumpkins.

Apply at 2 to 4 pints per acre to maximize effectiveness. The systemic action ensures full plant coverage from roots to leaves. It enhances nutrient uptake, promoting better crop growth and resilience.

Farmers appreciate ProPhyt for its environmentally friendly profile. The rapid absorption makes it highly effective under high disease pressure. It works well in integrated pest management programs.

Pros:

• Systemic protection
• Boosts immunity
• Fast absorption
• Environmentally friendly
• Improves plant vigor
• Works on resistant fungi
• Compatible with other products

Cons:

• Not a standalone treatment
• Requires frequent application
• Expensive for small farms

---

16. Merivon Fungicide – Pyraclostrobin and Fluxapyroxad Blend
Merivon Fungicide offers a dual-active formula combining pyraclostrobin and fluxapyroxad. It provides excellent control over powdery mildew, Alternaria, and gummy stem blight in Pumpkins  . The formula enhances photosynthesis and improves Pumpkins  fruit quality.

Apply at a rate of 4 to 5.5 ounces per acre for optimal protection. The systemic movement ensures deep penetration and long-lasting disease suppression. It is rainfast within hours, making it effective Pumpkins Fungicide   in variable weather.

Farmers report increased yields and improved fruit appearance with Merivon. Its dual-active formula prevents resistance buildup, making it a valuable rotation product. The fungicide supports overall plant health and productivity.

Pros:

• Dual-active formula
• Long-lasting control
• Improves yield
• Fast rainfastness
• Boosts photosynthesis
• Reduces resistance risk
• Works in all climates

Cons:

• Not organic
• Requires PPE
• Can be costly

---

17. Quadris Top Fungicide – Strobilurin & DMI Blend for Pumpkin Disease
Quadris Top combines azoxystrobin and difenoconazole for broad-spectrum disease control in Pumpkins  . It targets powdery mildew, downy mildew, and leaf blights in Pumpkins  . The systemic movement ensures long-lasting protection across the  Pumpkins   plant.

Apply at 12 to 14 ounces per acre for maximum efficacy. It prevents disease establishment while enhancing plant metabolism. The fungicide works well in integrated Pumpkins   disease management programs.

Users appreciate its reliability against resistant fungal strains. The translaminar and systemic properties make it highly effective. It is suitable for large-scale pumpkin production.

Pros:

• Broad-spectrum control
• Long residual effect
• Strong systemic action
• Prevents resistance buildup
• Easy to apply
• Boosts plant growth
• Compatible with tank mixes

Cons:

• Not organic
• Requires PPE
• Can be expensive

---

18. Serenade ASO – Biofungicide for Organic Pumpkin Growers
Serenade ASO is a biological fungicide containing Bacillus subtilis for natural disease suppression in Pumpkins  . It controls powdery mildew, bacterial leaf spot, and other fungal pathogens. The organic-certified formula supports sustainable farming practices.

Apply at 2 to 6 quarts per acre to maintain Pumpkins  disease resistance. The beneficial bacteria colonize plant surfaces, creating a protective shield. It is safe for pollinators and beneficial insects.

Growers prefer Serenade ASO for its eco-friendly approach. The biofungicide integrates well into organic Pumpkins  disease management programs. It enhances plant health without harmful residues.

Pros:

• Organic-certified
• Safe for pollinators
• Natural disease control
• Enhances immunity
• No resistance risk
• Works on multiple pathogens
• Eco-friendly formula

Cons:

• Not as fast-acting
• Requires frequent application
• Higher cost per use

20. Actigard Plant Activator – SAR-Based Defense for Pumpkins

Actigard Plant Activator stimulates the plant’s systemic acquired resistance (SAR) against Pumpkins  fungal and bacterial infections. It is highly effective against powdery mildew, downy mildew, and bacterial wilt. The formula strengthens the plant’s natural defenses rather than directly killing pathogens.

Apply at a rate of 0.33 to 0.75 ounces per acre for optimal results. It activates within 24 to 48 hours, offering long-lasting Pumpkins disease resistance. The lightweight application ensures compatibility with other treatments.

Growers value Actigard for its ability to protect plants without harming beneficial organisms. It works well in integrated Pumpkins disease management programs. The low application rate makes it cost-effective for large-scale pumpkin production.

Pros:

• Boosts natural immunity
• Long-lasting protection
• Low application rate
• Safe for pollinators
• No residue concerns
• Works with other treatments
• Reduces disease severity

Cons:

• Not a direct fungicide
• Takes time to activate
• Requires precise dosing

Buyer’s Guide Tips for Choosing the Best Fungicide for Pumpkins

1. Choose Fungicides Based on Disease Prevention
When selecting a pumpkins fungicide, consider products that provide preventive action. Fungicides like Captan and Chlorothalonil are known for their ability to protect pumpkins from a variety of fungal diseases before they start. Prevention is crucial in maintaining a healthy pumpkin crop throughout the growing season.

2. Look for Fungicides with Broad-Spectrum Control
A pumpkins fungicide that offers broad-spectrum control can protect your crops against multiple fungal diseases. Products like Bravo Weather Stik and Orondis Opti target various pumpkin diseases, including powdery mildew and downy mildew. Broad-spectrum fungicides can help reduce the need for multiple treatments, saving time and money.

3. Consider Systemic vs. Contact Fungicides
Decide between systemic fungicide or contact fungicide for your pumpkins based on your needs. Systemic fungicides, such as Inspire Super or Rally 40WSP, are absorbed by the plant, providing long-lasting protection. Contact fungicides like Mancozeb stay on the surface, protecting against new fungal growth but requiring more frequent applications.

4. Opt for Organic Fungicides for Eco-Friendly Gardening
If you’re growing pumpkins organically, choose a pumpkins fungicide that’s approved for organic farming. Products like Regalia Biofungicide and Serenade Garden use natural ingredients to control diseases. Organic fungicides are gentle on beneficial insects and the environment while still providing effective disease control.

5. Look for Fungicides That Work in Various Weather Conditions
Rain can wash away fungicides, so consider pumpkins fungicide products with rainfastness for better results. Inspire Super Fungicide is rainfast within hours, allowing it to stay effective even after a downpour. Choosing rainfast fungicides ensures your treatment lasts longer and provides more reliable protection.

6. Buy Fungicides with Resistance Management Properties
To avoid pumpkins fungicide resistance, select products that feature different modes of action, such as Quintec or Procure 480SC. These fungicides work by targeting various fungal processes, preventing the fungus from adapting and becoming resistant. Regularly rotating fungicides with different active ingredients helps protect the efficacy of your treatments.

7. Check the Application Rate and Ease of Use
Before purchasing a pumpkins fungicide, check the application rate and ease of use. Some products may require mixing, while others are ready to use. Make sure the fungicide fits with your routine and equipment—products like Fungonil come in concentrated forms that require dilution, while Serenade Garden is a convenient ready-to-spray option

Best Fungicide for Pumpkins FAQs

1. What is the best fungicide for preventing powdery mildew on pumpkins?
The best fungicides for powdery mildew on pumpkins include Quintec Fungicide, Procure 480SC, and Rally 40WSP. These systemic fungicides provide long-lasting protection and control. Organic options like Serenade Garden and Regalia Biofungicide are also effective for prevention.

2. How often should I apply fungicide to my pumpkin plants?
Fungicides should be applied every 7 to 14 days, depending on the product and disease pressure. In high humidity or rainy conditions, more frequent applications may be necessary. Always follow the label instructions for the best results.

3. Can I use organic fungicides on pumpkins?
Yes, organic fungicides like Serenade Garden, Regalia Biofungicide, and Copper Fungicide are safe for pumpkins. These products help control fungal diseases without harmful chemicals. They are ideal for organic and sustainable farming.

4. What is the best fungicide for downy mildew on pumpkins?
For downy mildew, Orondis Opti, Zampro, and Ranman 400SC are among the most effective chemical fungicides. Biofungicides like Actigard Plant Activator can also strengthen plant defenses. Early application is crucial to prevent disease spread.

5. Can I mix different fungicides for better protection?
Yes, rotating and mixing fungicides with different modes of action helps prevent resistance. For example, combining a systemic fungicide like Inspire Super with a contact fungicide like Mancozeb improves disease control. Always check product labels for compatibility.

6. Are there any fungicides safe for pumpkin flowers and pollinators?
Yes, Regalia Biofungicide, Serenade Garden, and Actigard Plant Activator are safe for pollinators. Avoid applying chemical fungicides during peak pollination hours to protect bees. Opt for early morning or late evening applications.

7. What is the best way to apply fungicide to pumpkins?
Use a sprayer with fine mist settings to ensure full coverage of leaves, stems, and undersides. Apply before rainfall for better absorption and reapply after heavy rains if needed. Proper coverage is key to effective disease prevention.

Conclusion

In conclusion, selecting the best fungicide for pumpkins is crucial for achieving a healthy and abundant pumpkin harvest. The right pumpkin fungicide will protect your crops from common diseases like powdery mildew and downy mildew, ensuring that your plants stay disease-free throughout the growing season.

Products such as Inspire Super Fungicide and Quintec Fungicide stand out for their effective control and long-lasting pumpkin protection.

Whether you opt for systemic, broad-spectrum, or organic pumpkins fungicide, it’s important to consider the specific needs of your crops, including application rate and weather conditions.

By using the proper pumpkins fungicide, you’ll safeguard your pumpkins from fungal diseases and boost their overall growth, leading to a successful and productive harvest.