Metalaxyl Mancozeb is a combination systemic and protective fungicide used for the management of late blight, downy mildew and other susceptible oomycete diseases.
Metalaxyl Mancozeb is a combination fungicide with both systemic and protective activity, used for the management of several important plant diseases caused by oomycete pathogens.
The formulation combines the systemic activity of Metalaxyl with the contact and protective action of Mancozeb. This dual mode of action helps provide both internal protection within plant tissues and surface protection against susceptible fungal pathogens.
According to the supplied product information, the formulation contains:
8% Metalaxyl
64% Mancozeb
Packaging
1000 g
Mode of Action of Metalaxyl Mancozeb
Metalaxyl Mancozeb combines two active ingredients with different modes of action.
Metalaxyl is a systemic fungicide from the acylalanine group. It is absorbed through roots, stems and leaves and moves within plant tissues. Its activity interferes with important processes involved in pathogen growth and reproduction.
Mancozeb is a contact fungicide from the dithiocarbamate group. It remains mainly on treated plant surfaces and interferes with multiple fungal enzyme systems.
The combination of these two active ingredients allows Metalaxyl Mancozeb to provide both systemic and protective activity in crop disease-management programs.
Main Benefits of Metalaxyl Mancozeb
Metalaxyl Mancozeb offers several advantages in plant disease management:
systemic and contact fungicidal activity
protective and curative properties
useful activity against oomycete diseases
suitable for late blight and downy mildew management
movement of Metalaxyl within plant tissues
protective surface action from Mancozeb
useful in integrated disease-management programs
Metalaxyl Mancozeb for Late Blight
One of the important uses of Metalaxyl Mancozeb is the management of late blight on susceptible crops such as potato and tomato, depending on local registration.
The systemic Metalaxyl component helps protect plant tissues after absorption, while Mancozeb remains on the surface and helps prevent new infection.
Preventive or early application is generally more effective than treatment after severe disease development.
Metalaxyl Mancozeb for Downy Mildew
Metalaxyl Mancozeb may also be used in disease-management programs against downy mildew on crops such as:
cucumber
tomato
onion
lettuce
tobacco
other susceptible crops
Application timing, dose and frequency should always follow the approved product label and local agricultural recommendations.
Use Against Oomycete Diseases
Metalaxyl Mancozeb is particularly relevant for the management of diseases caused by oomycete pathogens.
These pathogens are associated with several important diseases, including:
late blight
downy mildew
damping-off
root diseases
crown diseases
The combination of systemic and surface protection can help improve disease management when used correctly as part of an integrated program.
Use in Seedlings and Young Plants
According to the supplied product information, Metalaxyl Mancozeb may also be used in some registered disease-management programs for seedlings and young plants.
Possible applications may include treatment of seedlings or management of damping-off and related diseases.
Use in nurseries or seedling production should always follow the approved product label.
Application Timing
For best performance, Metalaxyl Mancozeb should generally be applied:
before severe disease development
at the early stages of infection
during environmental conditions favorable for oomycete diseases
Good spray coverage and correct application timing are important for effective disease management.
Pre-Harvest Interval
According to the available product information, the pre-harvest interval is approximately 7 to 14 days.
The exact PHI may vary depending on crop, application method and local registration requirements.
Always follow the approved product label.
Resistance Management
Because Metalaxyl has a specific mode of action, repeated use of Metalaxyl Mancozeb without rotation may increase the risk of resistance development in susceptible pathogen populations.
Recommended resistance-management practices include:
rotating with fungicides from different mode-of-action groups
avoiding unnecessary repeated applications
using the recommended application rate
applying at the correct disease stage
integrating fungicide use with sanitation and cultural practices
Compatibility
Before tank mixing Metalaxyl Mancozeb with other pesticides or fertilizers, a compatibility test is recommended where necessary.
Only use combinations permitted by the approved label.
Safety and Handling
Use suitable personal protective equipment during mixing and application.
Avoid contact with skin and eyes and prevent contamination of food, feed and water sources.
Store the product in its original container in a cool, dry and well-ventilated location.
Always follow the official product label and local pesticide regulations.
Frequently Asked Questions
What is Metalaxyl Mancozeb used for?
Metalaxyl Mancozeb is used in disease-management programs against susceptible oomycete diseases such as late blight and downy mildew.
Is Metalaxyl Mancozeb systemic?
Yes. Metalaxyl provides systemic activity, while Mancozeb provides contact and protective activity.
What does Metalaxyl Mancozeb contain?
According to the supplied product information, it contains 8% Metalaxyl and 64% Mancozeb.
Can Metalaxyl Mancozeb be used for late blight?
Yes, where locally registered, it may be used in late blight management programs on susceptible crops.
What is the PHI of Metalaxyl Mancozeb?
The supplied product information indicates a PHI of approximately 7 to 14 days, depending on crop and registration.
Product
Diseases
Consumption rate
Cucumber
Damping off
2 kg/ha
Potato
phytophthora blight
3 kg/ha
Additional information
Packaging
1000gr
Formulation
WP72%
Resistance group
FRAC=4,A1, FRAC=M3,M
Chemical group
Acylalanine, Alkylenebis
Amount of active ingredient
720gr/KG
Wear gloves, a mask, and appropriate clothing.
Do not use in extreme heat, wind, or when the plant is flowering.
To prevent resistance, do not use more than two consecutive applications per season.
Prevent the solution from entering waterways. Wait a full 24 hours before applying to allow complete absorption of metalaxyl.
Avoid mixing with alkaline and copper compounds.
It is very effective in nurseries and seedlings, but a lower dose is recommended.
For sensitive plants (e.g., some cucumber varieties), a small test should be performed first
Mancozeb is moderately toxic to aquatic life; spraying near ponds and rivers is prohibited.
If using acids, prevent the concentrated solution from entering water sources.
Toxicity to bees is low, but do not use when bees are flying.
It degrades slowly in soil and the risk of long-term accumulation is low.
Excessive use increases the risk of disease resistance.
