What are the 3 modes of action of fungicides?

What are the 3 modes of action of fungicides?

In the following, fungicides and their modes of action are classified into three broad groups:

• Inhibitors of sterol synthesis.
• Inhibitors of mitochondrial electron transport (respiration inhibitors).
• Multi-site enzyme inhibitors, nucleic acid and protein synthesis inhibitors.

How do fungicides work?

Fungicides are pesticides that kill or prevent the growth of fungi and their spores. They can be used to control fungi that damage plants, including rusts, mildews and blights. Fungicides work in a variety of ways, but most of them damage fungal cell membranes or interfere with energy production within fungal cells.

What are the types of fungicides?

Fungicides are broadly classified into three categories, namely, contact, translaminar and systemic.

What is fungicide write down classification of fungicides based on mode of action and the methods of application of fungicides?

Fungicides can be broadly grouped based on their (i) mode of action (ii) general use and (iii) chemical composition. As the name suggests, protectant fungicides are prophylactic in their behaviour. Fungicide which is effective only if applied prior to fungal infection is called a protectant, eg., Zineb, Sulphur.

What is mode of action of fungus?

Fungal cell membranes have a unique sterol, ergosterol, which replaces cholesterol found in mammalian cell membranes. An antifungal agent is a drug that selectively eliminates fungal pathogens from a host with minimal toxicity to the host.

What modes of action are exhibited by systemic fungicides?

Systemic fungicides are those that are absorbed into the plant. Locally systemic fungicides move within the plant but not far from the site of penetration. Some locally systemic fungicides can have a translaminar mode of action and move through the leaf from one side of the leaf to the other.

How do systemic fungicides work?

Systemic fungicides are absorbed by the plant cuticle and underlying tissues and can act by killing spores and hyphae as well as incipient infections where the fungus has penetrated the plant surface. In the latter case, the higher the rate used, the better the post-infection activity.

What is a major role that fungi play in ecosystems?

Many act as decomposers, breaking down the dead bodies of plants and animals and recycling the nutrients they hold. The fungal decay makes these nutrients and carbon dioxide available to green plants for photosynthesis, and it completes an important cycle of raw materials in the ecosystem.

What are the two types of fungicides?

According to the origin, two major groups of fungicides are available: biological and chemical based. The bio-fungicides are composed of living microorganisms like bacteria and fungi as active ingredients and are effective against the pathogens that cause turf disease.