Azoxystrobin

Azoxystrobin is a fungicide commonly used in agriculture. The substance is used as an active agent protecting plants and fruit/vegetables from fungicidal diseases.

Additional recommended knowledge

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Origin

Azoxystrobin was discovered during research on Oudemansiella mucida and Strobilurus tenacellus, which are small white or brown coloured mushrooms commonly found in the Czech forests. Not bigger than a few centimeters, these mushrooms attracted attention of scientists because of their remarkable ability to defend themselves. Their defense mechanism is based on the secretion of two substances, strobilurin A and oudemansin A. These substances allow them to keep their competitors at a distance and even destroy them when in range. Observations of this mechanism led directly to research that resulted in azoxystrobin.

Activity

After synthesizing experimental analogs of both substances (over 1400 were tested), azoxystrobin was found to be the most active and stable combination. The pharmacophore of azoxystrobine is the β-methoxyacrylate portion, which is present in the active compounds from both Oudemansiella mucida and Strobilurus tenacellus.

Efficienty

Azoxystrobin possesses the broadest spectrum of activity of all presently known antifungals. It is presently the only counteragent that has the ability to protect against the 4 big groups of Fungicidal diseases:

• Ascomycota : Septoria
• Deuteromycota : Pyricularia (rice harvesting)
• Basidiomycota : Stripe rust
• Oomycota : Water mould (grape harvesting)

Examples

Azoxystrobin is widely used in farming, particularly in wheat farming. Applying agenst containting azoxystrobin provides protection against many types of diseases, including:

• Wheat septoria
• Septoria leaf spot
• Wheat leaf rust (Puccinia recondita)
• Rye leafrust (Puccinia triticina)
• Powdery mildew
• Downy mildew
• Stripe rust
• Haustorium
• Pyrenophora teres

Practical use

• Grain farming
• Banana transport

Ecotoxicologic

Azoxystrobin has a favorable ecologic and ecotoxicologic footprint, meeting the expectations of agricultural demand.

Its toxicity is low for mammals, birds, bees, insects, and earthworms.

Azoxystrobin is broken down into the soil. The agent is not very mobile and therefore is unlikely to penetrate further in the soil and come into contact with groundwater.