Mancozeb
Active ingredient Especially harmful

Mancozeb

Description

Mode of action

Mancozeb belongs to the ethylene bisdithiocarbamate class of fungicides and serves as a vital tool for preventative disease control in crops.

Its primary mechanism of action involves the inactivation of sulfhydryl groups in enzymes within fungal cells, which disrupts their essential metabolic processes.

This multi-site activity makes it highly effective as a broad-spectrum protectant and ensures a low risk of pathogens developing resistance to the chemical.

Upon application, the substance leaves a persistent protective coating on the plant surface, preventing fungal spores from germinating and penetrating the tissue.

Being a contact fungicide, it does not translocate within the plant, meaning the longevity of its protection depends on thorough and uniform spray coverage.

What it targets

Mancozeb is widely used to manage diseases such as late blight, early blight, scab, downy mildew, leaf spots, and various rusts on agricultural crops.

It is standard for protecting potatoes, tomatoes, onions, grapes, fruit trees, and various field crops from yield-reducing fungal infections.

Rates and timing

Application rates are typically determined by the target crop and pathogen pressure, generally ranging from 1.5 to 2.5 kilograms of active ingredient per hectare.

The most effective strategy is a prophylactic application scheduled before conditions become favorable for disease development or at the earliest sign of risk.

Frequent applications at 7 to 14-day intervals are often required to protect new growth and maintain the protective layer throughout the critical period.

Restrictions

Operators must wear appropriate protective clothing, including respirators and gloves, to minimize exposure to the substance during mixing and spraying.

It is crucial to avoid application near bodies of water and to prevent drift into non-target areas to protect aquatic ecosystems and beneficial insects.

Mancozeb should not be mixed with strongly alkaline products, such as Bordeaux mixture or lime sulfur, as this reduces its biological stability.

Strict adherence to pre-harvest intervals is necessary to ensure the safety of food products and compliance with local agricultural residue regulations.

The product should be kept in a cool, dry, and well-ventilated storage facility away from fire hazards and direct sunlight to maintain chemical integrity.

Regulatory

Status in the European Union

Not approved in the EU

CAS number
8018-01-7
Category (EU)
FU - Fungicide
Approved from
01.07.2006
Approval until
04.01.2021
ADI
0.023 mg/kg bw/day
ARfD
0.15 mg/kg bw
AOEL
0.011 mg/kg bw/day
Hazard classification (CLP)
Aquatic Acute 1 - H400Repr. 2 - H361dSkin Sens. 1 - H317
EU legislation

EU status is for reference only and does not replace national registration in your country.

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