Dodine Fungicide: Uses, Price, Systemic Action & Complete Crop Protection Guide

🌿 Quick Definition & Key Takeaways

Dodine Fungicide is a broad-spectrum, protectant and contact fungicide belonging to the Guanidine chemical group, used extensively in agriculture to control fungal diseases on fruit crops, vegetables, and ornamentals. It works by disrupting fungal cell membrane permeability — killing spores before and shortly after infection.

• Common Name: Dodine | IUPAC Name: Dodecylguanidine acetate
• Chemical Group: Guanidine (FRAC Code: U12)
• Mode of Action: Contact + weak systemic (translaminar) — disrupts fungal cell membranes
• Popular Brand Names: Syllit, Melprex, Superstar Dodine, Venturex, Cyprex
• Key Crops: Apple, pear, cherry, peach, walnut, strawberry, rose
• Primary Diseases Controlled: Apple scab, cherry leaf spot, peach leaf curl, powdery mildew
• Dose: 45–65 ml per 100 litres of water (formulation-dependent)
• PHI (Pre-Harvest Interval): 14–21 days (crop-specific)

What Is Dodine Fungicide?

Dodine (dodecylguanidine acetate) is one of the oldest and most trusted active ingredients in fruit crop disease management — first registered for agricultural use in the 1950s and still widely used today due to its proven efficacy, broad-spectrum activity, and cost-effectiveness. It is classified under the Guanidine group of fungicides (FRAC Code U12) — a relatively unique chemical class with a distinct mode of action that makes it a valuable tool in resistance management rotations.

Dodine is most commonly available as a wettable powder (WP) or soluble concentrate (SC) formulation, typically at concentrations of 40–65% active ingredient. It is sold under multiple trade names globally — with Syllit and Superstar Dodine being among the most recognized brands in international and Indian markets respectively.

Its primary strength lies in its protectant activity — it must be applied before or very early in fungal infection to be most effective. However, dodine also exhibits a degree of translaminar (locally systemic) movement within leaf tissue — giving it a limited curative window of 24–48 hours post-infection that makes it more versatile than pure contact fungicides.

What Is the Use of Dodine Fungicide?

Dodine's primary use is the prevention and early control of fungal diseases on a wide range of economically important fruit crops and ornamental plants. It is particularly indispensable in apple and pear orchards where it has been the backbone of scab management programs for decades.

Core Agricultural Uses of Dodine

• Apple scab (Venturia inaequalis) — the most important single use; applied from green tip through petal fall stages
• Pear scab (Venturia pirina) — similar program to apple scab management
• Cherry leaf spot (Blumeriella jaapii) — critical for sweet and sour cherry quality preservation
• Peach leaf curl (Taphrina deformans) — dormant and early season applications
• Walnut blight and leaf spot (Gnomonia leptostyla, Xanthomonas juglandis) — pre-season spray programs
• Strawberry leaf scorch and leaf spot — early season applications
• Powdery mildew suppression on multiple crops — secondary activity
• Rose black spot (Diplocarpon rosae) — ornamental horticulture applications

Industry-Specific Uses

Is Dodine a Systemic or Contact Fungicide?

This is one of the most frequently asked questions about dodine — and the answer is nuanced.

The Technical Classification

Dodine is primarily a CONTACT (protectant) fungicide with weak translaminar (locally systemic) properties.

Here is what this means in practice:

Contact / Protectant Activity (Primary Mode)

• Dodine remains on the leaf surface after application and kills fungal spores before or at the moment of germination
• It must be applied before rain or dew events that trigger spore release and infection
• Does not move through the vascular system (xylem/phloem) of the plant — so it cannot protect new growth emerging after application
• Requires thorough, uniform spray coverage of all leaf and fruit surfaces for maximum efficacy

Translaminar (Locally Systemic) Activity (Secondary Mode)

• Dodine penetrates leaf tissue to a limited depth — moving from the upper leaf surface to the lower surface within 1–2 hours of application
• This translaminar movement provides a short curative window of 24–48 hours post-infection — meaning dodine can still control infections that have just begun if applied within this window
• This property places dodine in the category of "protectant-plus" fungicides — more versatile than purely surface-contact products

Practical Implication for Farmers

Apply dodine before predicted rain events (within 24 hours) during high-disease-pressure periods. If applied immediately after infection (within 24–48 hours), translaminar movement gives limited eradicant activity. Do not rely on dodine as a curative treatment for established infections.

Dodine Fungicide Uses — Crop-by-Crop Application Guide

Apple Scab Management Program

Apple scab is the defining use case for dodine worldwide. A well-structured dodine program involves:

Pre-Bloom (Green Tip to Pink):

• First application at green tip stage — critical infection period begins
• Reapply every 7–10 days or after rainfall exceeding 10mm
• Combine with captan or mancozeb for broader disease spectrum coverage

Bloom to Post-Bloom (Petal Fall):

• Continue 7–10 day intervals during high-risk wet periods
• Avoid application during full bloom if bee activity is high — switch to alternative chemistry temporarily

Summer Program:

• Extend intervals to 10–14 days if weather is dry
• Rotate with DMI fungicides (myclobutanil, tebuconazole) or SDHI fungicides to manage resistance risk

Cherry Leaf Spot Program

• Begin applications immediately after petal fall
• Spray every 10–14 days through the pre-harvest period
• Stop applications 14–21 days before harvest (observe PHI on label)
• Cherry leaf spot control is critical — defoliation reduces the following year's fruit bud set and yield

Peach Leaf Curl Application

• Apply dodine at dormant or delayed dormant stage before bud swell — a single well-timed application is highly effective
• A second application at 10–15% bud swell provides excellent season-long protection against peach leaf curl

Is Dodine Systemic or Contact? — Quick Reference Summary

What Is Superstar Dodine Used For?

Superstar Dodine is a commercially branded dodine fungicide product widely available in Indian and Asian markets. It typically contains Dodine 65% WP (Wettable Powder) as the active ingredient — one of the higher-concentration dodine formulations available.

Superstar Dodine — Key Uses

• Apple scab management — the primary and most important use in Indian apple-growing regions (Himachal Pradesh, Jammu & Kashmir, Uttarakhand)
• Pear and cherry disease programs in Himalayan fruit-growing belts
• Walnut leaf spot and anthracnose control in Jammu & Kashmir
• Powdery mildew suppression as part of integrated spray programs
•  

Superstar Dodine Recommended Dosage

Why Superstar Dodine Is Popular Among Indian Farmers

• Cost-effective — high active ingredient concentration (65% WP) means lower per-application cost
• Trusted efficacy on apple scab — critical in Himachal Pradesh and J&K apple orchards
• Wide availability through agro-input dealers in hill states
• Good rainfastness — adheres to leaf surface within 2 hours of drying
• Compatible with most commonly used insecticides and other fungicides (always verify before tank-mixing)

Dodine Fungicide Price in India

Dodine fungicide pricing in India varies by formulation concentration, brand, pack size, and purchase channel:

Approximate Price Range (India, 2025)

Where to Buy Dodine Fungicide

• Authorized agro-input dealers in Himachal Pradesh (Shimla, Solan, Kullu), Jammu & Kashmir (Sopore, Shopian), and Uttarakhand (Munsiyari, Pithoragarh)
• Online agri platforms: BigHaat, Krishidukan, AgriBegri, BharatAgri
• State Agriculture Department distribution centres during crop protection advisory programs

Cost Per Acre Calculation (Superstar Dodine 65% WP)

At ₹1,000/kg for Superstar Dodine 65% WP, using 200 ml (200g) per acre per spray: Cost per acre per spray = approximately ₹200 For an 8-spray apple scab program: ₹1,600 per acre for full season protection — highly cost-effective.

Dodine Fungicide Safety & Precautions

Environmental Profile

• Toxicity class: WHO Class II (Moderately Hazardous) — handle with appropriate PPE
• Bee safety: Moderately toxic to bees — avoid application during bloom when bees are active
• Fish toxicity: Moderately toxic — avoid contamination of water bodies, irrigation channels
• Soil persistence: Low to moderate — does not accumulate significantly in soil

Personal Safety Precautions

• 🧤 Always wear PPE — gloves, protective clothing, eye protection, and face mask during mixing and application
• 🚿 Wash thoroughly with soap and water after handling
• 🕗 Apply early morning or evening to minimize drift and operator exposure
• 🚫 Do not eat, drink, or smoke while handling dodine products
• 🌿 Observe PHI strictly — 14–21 days pre-harvest depending on crop and label

Resistance Management

Dodine's FRAC Group U12 classification is distinct from the major fungicide groups (DMIs, SDHIs, QoIs) — making it an excellent rotation partner in resistance management programs:

• Rotate dodine with FRAC Group 3 (DMI), Group 7 (SDHI), or Group M (multi-site) fungicides
• Do not apply more than 3–4 consecutive sprays of dodine without rotation
• Monitor for reduced field efficacy — a potential sign of developing resistance

Dodine Fungicide vs. Other Apple Scab Fungicides

Best Practice: Use dodine as the primary protectant in your spray program, rotated with DMI or SDHI fungicides for curative coverage and resistance management.

Conclusion: Why Dodine Remains an Essential Fungicide in 2025

Despite being one of the oldest active fungicide ingredients in modern agriculture, dodine continues to earn its place in fruit grower spray programs worldwide — and for good reason:

• Proven, consistent efficacy against apple scab and cherry leaf spot built over 70+ years of use
• Unique FRAC Group U12 classification providing genuine resistance management value
• Cost-effective protection — particularly the Superstar Dodine 65% WP formulation popular in Indian hill orchards
• Translaminar activity bridging the gap between pure contact and systemic fungicides
• Compatibility with most major tank-mix partners in integrated spray programs

Whether you are an apple grower in Himachal Pradesh, a cherry farmer in J&K, or a global fruit producer seeking a reliable, affordable protectant fungicide — dodine belongs in your seasonal disease management toolkit.

Ready to protect your orchard? Consult your local agro-input dealer or crop protection agronomist for the latest Dodine fungicide availability and program recommendations in your region.

Disclaimer: Fungicide registration, dosage recommendations, and pre-harvest intervals vary by country, crop, and product formulation. Always read the product label and consult a certified agronomist before application. Follow all local pesticide regulations and safety guidelines.

FAQ

Q1. What is Dodine fungicide? Dodine (dodecylguanidine acetate) is a broad-spectrum contact fungicide from the Guanidine group (FRAC Code U12). It controls fungal diseases on fruit crops like apple, cherry, and peach by disrupting fungal cell membrane permeability. It is sold under brands like Syllit, Superstar Dodine, and Melprex.

Q2. What is the use of Dodine fungicide? Dodine is used to control apple scab, pear scab, cherry leaf spot, peach leaf curl, walnut leaf spot, and rose black spot. It is most effective as a protectant applied before infection — especially during wet weather periods when fungal spore release is high.

Q3. Is Dodine a systemic or contact fungicide? Dodine is primarily a contact (protectant) fungicide with weak translaminar activity. It does not move through the plant's vascular system. However, it penetrates leaf tissue within 1–2 hours — giving a limited curative window of 24–48 hours after infection begins. It is NOT a true systemic fungicide.

Q4. What is Superstar Dodine used for? Superstar Dodine (65% WP) is mainly used for apple scab management in Indian hill orchards (Himachal Pradesh, J&K). It is also used for pear scab, cherry leaf spot, and walnut anthracnose. It is one of the most popular dodine brands among Indian fruit growers due to its high active ingredient concentration.

Q5. What is the dose of Superstar Dodine per litre of water? The recommended dose of Superstar Dodine 65% WP is 0.45–0.65 ml (or g) per litre of water. For a 15-litre knapsack sprayer, use 7–10 g per tank. For high-volume orchard sprayers, use 45–65 g per 100 litres of water.

Q6. What is the price of Dodine fungicide in India? Dodine fungicide prices in India (2025):

• Superstar Dodine 65% WP — 500g: ₹500–₹700
• Superstar Dodine 65% WP — 1 kg: ₹900–₹1,200
• Generic Dodine 65% WP — 1 kg: ₹700–₹1,000
• Dodine 40% SC — 500 ml: ₹600–₹900

Prices vary by region and dealer. Available at agro-input shops and online platforms like BigHaat and AgriBegri.

Q7. How often should Dodine be applied? During high-disease-pressure periods (wet weather, spring), apply Dodine every 7–10 days. During dry, low-risk periods, extend intervals to 10–14 days. For apple scab, begin at the green tip stage and continue through petal fall. Do not apply more than 3–4 consecutive sprays without rotating to another FRAC group.

Q8. What crops can Dodine fungicide be used on? Dodine is registered for use on apple, pear, cherry, peach, nectarine, walnut, strawberry, and ornamental plants (especially roses). Its primary crop is apple — for scab control. In India, it is most widely used in apple orchards of Himachal Pradesh, Jammu & Kashmir, and Uttarakhand.

Q9. Can Dodine be mixed with other fungicides? Yes. Dodine is compatible with most fungicides including captan, mancozeb, and DMI fungicides (myclobutanil, tebuconazole). A common tank-mix is Dodine + Captan for broader disease coverage on apple. Always perform a jar compatibility test before mixing with new products and check the current product label.

Q10. What is the Pre-Harvest Interval (PHI) for Dodine? The Pre-Harvest Interval (PHI) for Dodine is 14–21 days depending on the crop and country-specific label registration. In India, the commonly followed PHI for apple is 14 days. Always check the specific product label (Superstar Dodine or Syllit) for the exact PHI applicable to your crop and region.