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What Is Fungicide

What are Fungicide

Fungicides are substances that are used to eliminate or prevent the growth of fungi or their spores. Fungi include but are not limited to mould, mildew, blights, and rusts. Fungi cannot produce their own carbohydrate food as they lack chlorophyll and feed on living plants or dead organic matter. Fungi are a big concern in agriculture as most crop diseases are caused by fungi. The effect of fungi and fungal plant diseases has been recorded even in early history but their cause was not identified. It was only in 1861 that Anton de Bary, the father of plant pathology, identified a fungus that was causing rot in potatoes and in 1885 that a fungicide was developed to inhibit its growth. The major boost to fungicide development was in the 20th century. Many new types of fungicides were developed and widespread use was adopted, providing protection from many plant diseases for the first time in history. As an alternative to conventional fungicides, biofungicides, which are formulations of living microorganisms, are also being adopted as a method to control the growth of fungi.

Importance of Fungicides

Fungi can be difficult to control. They produce a massive quantity of spores which can spread via rain or wind over long distances to settle in favourable conditions such as surfaces of leaves, stems or fruit. Fungi can grow through and between plant cells, withdraw nutrients, and even in some cases produce toxins that kill the plants. Fungi can also thrive in crop debris and infect the next cycle of crops.

Fungicides for plants can prevent the fungi spores from growing and eliminate the fungi that might already exist to protect the health of the crops. Modern fungicides have been developed to specifically target fungi and do a lot more. Synthetic chemical fungicides can provide protection without being absorbed or translocated by the plant. Fungicides also make it possible to provide protection against a wide variety of fungi. Some systemic fungicides have also been developed that can be absorbed by the plant and have a therapeutic effect by curing plant diseases. Apart from synthetic fungicides, biofungicides can also be used to control certain types of fungi and are especially useful for organic production. Fungicides are a necessary part of today's agricultural sector as without it production would be severely impacted as there would be no protection from diseases.

Different Types of Fungicides

The classification of fungicides for plants can be done in many ways including but not limited to their activity, mobility in the plant, and role in the protection of plants.

Types of Fungicides Based on Mobility

  • Contact Fungicides

    - These are fungicides that eradicate the fungus they come in direct contact with. These fungicides remain on the surface where they are applied but don't go deeper, which is why repeated applications might be required to protect plants from fungicides as they grow.
  • Systemic Fungicide

    - Systemic fungicides are absorbed into the plant. These are usually either upwardly systemic, which means they move up within the plant, or locally systemic, which means they move into the plant and redistribute to some degree within the plant. Unlike contact fungicides, systemic fungicides can have some long-term activity.

Types of Fungicide Based on Activity

  • Single-site Fungicide - Single-site fungicides for plants are active against only one point in the metabolic functioning of the fungus or against a single critical enzyme necessary for its survival. These can also be systemic.
  • Multi-site Fungicide - Multi-site fungicides work by targeting many metabolic sites within the fungus. Since they have many target sites, these fungicides are usually at a lower risk of causing the development of fungicide resistance.

UPL continues to develop biofungicides and fungicides for plants and research new technologies that can provide added advantages like easy dissolution, dispersion, and complete coverage. We are also researching to make our fungicides more effective so lower dosages are required for crop protection.

Advantages of Fungicide

The use of fungicides and biofungicides provides many benefits. Some advantages of fungicides include:

  • Fungicides can prevent the loss of crops

    Before fungicides were developed, plant diseases could spread uncontrollably and threaten the crop yield, and in some cases, even wipe out the entire crop. With the use of fungicides, it is possible to control the loss of crops.

  • Fungicides can prevent fungi growth without damaging the crop

    Some other methods of controlling fungi can damage crops or affect the quality of the crops. Fungicides provide an effective way of killing the fungi that damage the crops without affecting the crops themselves.

  • Fungicides can provide protection from a broad spectrum of fungi

    Fungicides can not just eliminate fungi but also prevent them from growing. Many synthetic fungicides are capable of providing broad-spectrum protection against multiple species of common fungi.


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