Albaugh Defung Fungicide (Cymoxanil 8% + Mancozeb 64% WP) is a combination fungicide developed for management of important oomycete diseases in crops. It combines the locally systemic and curative activity of Cymoxanil with the broad-spectrum contact and protective activity of Mancozeb.
Albaugh recommends Defung for late blight in tomato and potato and downy mildew in grapes and cucumber. The formulation is also associated with registered use against gummosis or foot rot in citrus when applied according to the current product label.
| Product Name | Defung |
|---|---|
| Brand | Albaugh |
| Product Type | Fungicide |
| Technical Name | Cymoxanil 8% + Mancozeb 64% WP |
| Formulation | Wettable Powder (WP) |
| Action | Locally Systemic + Contact |
| Activity | Protective and Curative |
| Major Targets | Late Blight, Downy Mildew and Citrus Gummosis |
| Application | Foliar Spray and Label-Recommended Citrus Treatment |
| Active Ingredient | Concentration | Primary Role |
|---|---|---|
| Cymoxanil | 8% | Locally systemic, translaminar and curative activity |
| Mancozeb | 64% | Multi-site contact and protective activity |
| Formulation | Wettable Powder (WP) | |
| Crop | Target Disease | Recommended Dose | Approx. Water Volume |
|---|---|---|---|
| Tomato | Late Blight | 600 g per acre | 200–300 L per acre |
| Potato | Late Blight | 600 g per acre | 200–300 L per acre |
| Grapes | Downy Mildew | 600–800 g per acre | 200–400 L per acre |
| Cucumber | Downy Mildew | Approx. 600 g per acre | Approx. 200–240 L per acre |
Albaugh specifically recommends approximately 600 g per acre for late blight in tomato and potato and approximately 600–800 g per acre for downy mildew in grapes and cucumber. Always use the current Defung label as the final authority for crop-specific dose and application instructions.
Cymoxanil 8% + Mancozeb 64% WP also has registered use against gummosis or foot rot caused by Phytophthora palmivora in citrus. This use differs from normal foliar spraying because treatment may involve application around the tree and treatment of infected trunk areas according to label directions.
For citrus, carefully follow the current product label for preparation, dilution, linseed-oil treatment where applicable and quantity per tree. Do not use the foliar spray rate intended for tomato, potato, grapes or cucumber.
| Crop | Waiting Period |
|---|---|
| Tomato | 10 Days |
| Potato | 10 Days |
| Grapes | 10 Days |
| Cucumber | 10 Days |
| Citrus | 82 Days |
Observe the waiting period printed on the current Defung product label before harvesting treated crops.
Cymoxanil is a locally systemic and translaminar fungicide with protective and early curative activity. It penetrates treated tissues rapidly and helps suppress susceptible pathogens developing around the treated area.
Mancozeb is a multi-site contact fungicide that remains primarily on treated plant surfaces. It interferes with multiple enzyme systems in susceptible pathogens and helps prevent successful spore germination and infection.
The combination provides both surface protection and locally systemic activity, making Defung particularly useful against destructive oomycete diseases such as late blight and downy mildew.
Late blight is a destructive disease of tomato caused by Phytophthora infestans. Symptoms commonly include rapidly enlarging water-soaked or brown lesions on leaves and stems, and infection may also damage developing fruits.
Albaugh recommends Defung at approximately 600 g per acre for late blight management in tomato. Timely spraying before disease becomes severe is important for better disease suppression.
Potato late blight can spread rapidly during cool and humid conditions. Infection can affect leaves, stems and tubers and may cause severe crop damage if disease pressure is not managed promptly.
Defung combines the protective action of Mancozeb with the locally systemic and curative activity of Cymoxanil to help manage late blight in potato.
Downy mildew is an important grape disease that can infect leaves, shoots, flowers and developing bunches. Favourable humid and wet conditions can encourage rapid disease development.
Albaugh recommends approximately 600–800 g per acre of Defung for downy mildew in grapes. Thorough coverage of the grape canopy is important for effective performance.
Downy mildew in cucumber may produce angular yellow lesions on the upper leaf surface, while fungal growth may develop on the underside under humid conditions. Severe infection can cause rapid loss of healthy foliage.
Defung is recommended for cucumber downy mildew and should be applied at the crop-specific label rate with adequate spray-water volume for uniform coverage.
Citrus gummosis or foot rot is commonly associated with Phytophthora infection around the trunk and collar region. Symptoms may include bark damage, gum exudation and deterioration around infected areas.
The registered citrus treatment differs from standard foliar spraying. Follow the current Defung label carefully for preparation and application around affected trees.
The Mancozeb component of Defung helps provide a protective barrier on treated plant surfaces, while Cymoxanil penetrates treated tissues and provides locally systemic early curative activity.
This combination makes timely application especially valuable when weather conditions favour late blight or downy mildew development.
Apply Defung preventively when weather conditions favour late blight or downy mildew, or at the earliest appearance of disease symptoms according to label recommendations.
Do not wait until severe infection has spread throughout the crop. Disease pressure, crop stage and prevailing weather conditions should be considered when planning applications.
Defung is supplied as a wettable powder formulation. For uniform mixing, first prepare a smooth slurry using a small amount of water before adding it to the partially filled spray tank.
Maintain adequate agitation so that the formulation remains evenly suspended in the spray solution throughout application.
Cymoxanil provides locally systemic activity, while Mancozeb acts as a multi-site contact fungicide. Combining these different types of fungicidal activity can support a diversified disease-management program.
For repeated disease-control applications, follow the current label and integrate fungicides with appropriate cultural practices, field sanitation, disease monitoring and other suitable modes of action.
Before tank mixing Defung with insecticides, nutrients or other fungicides, check compatibility instructions on the labels of all products involved.
Albaugh Defung is a combination fungicide containing Cymoxanil 8% + Mancozeb 64% WP with locally systemic, contact, protective and curative activity.
Defung contains Cymoxanil 8% + Mancozeb 64% WP.
Albaugh lists tomato, potato, citrus, grapes and cucurbits among the crops associated with Defung. Specific registered uses include tomato, potato, grapes, cucumber and citrus.
It is used against late blight in tomato and potato, downy mildew in grapes and cucumber, and registered citrus gummosis or foot rot.
Albaugh recommends approximately 600 g per acre for late blight in tomato.
Albaugh recommends approximately 600 g per acre for late blight in potato.
Albaugh recommends approximately 600–800 g per acre for management of grape downy mildew.
Yes. Albaugh specifically recommends Defung against downy mildew in cucumber.
Defung is described by Albaugh as locally systemic. Cymoxanil penetrates treated tissues, while Mancozeb primarily provides contact protection on plant surfaces.
It provides both protective and curative activity. Mancozeb mainly provides preventive contact protection, while Cymoxanil contributes locally systemic early curative action.
Mancozeb is a multi-site contact fungicide that interferes with multiple metabolic processes in susceptible pathogens and helps prevent infection on treated surfaces.
Cymoxanil 8% + Mancozeb 64% WP has registered use against citrus gummosis or foot rot. Follow the current Defung label carefully because the citrus application method differs from normal foliar spraying.
The registered reference is 10 days for tomato, potato, grapes and cucumber, while citrus gummosis treatment carries a longer crop-specific waiting period. Always verify this on the current label.
No. Use Defung only on crops and diseases specifically recommended on the current registered product label.
Albaugh Defung Fungicide (Cymoxanil 8% + Mancozeb 64% WP) combines locally systemic and contact fungicidal activity for management of important diseases including late blight of tomato and potato and downy mildew of grapes and cucumber. Correct application timing, accurate dosage and thorough crop coverage are important for effective disease management.
Disclaimer: The details provided are for informational guidance only. Always adhere to the recommended application instructions as stated on the product label and in the accompanying leaflet.
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