Shetefon

Mechanism of Action

The effectiveness of the growth regulator "Shetefon" is based on ethephon, an active ingredient belonging to the group of ethylene-releasing compounds. Upon application to the surface of barley, the product penetrates the tissues and undergoes enzymatic breakdown. The released ethylene acts as a phytohormone that fundamentally alters the plant's metabolic vector.

Biochemical Control of Lodging

The main purpose of "Shetefon" is to manage the stem architecture. Ethylene inhibits cell elongation in the internodes, leading to the following agronomic results:

• Stem wall thickening: through the redistribution of plastic substances, the mechanical strength of the lower part of the plant is significantly enhanced.
• Shortening of internode length: the center of gravity is shifted downward, which is critical for preventing lodging during heavy rains or high wind events.
• Improved root system development: the plant redirects resources from height growth to the formation of a robust root base.

Technical Application Specifications

The product is formulated as an aqueous solution, ensuring high stability in tank mixtures and rapid dissolution. The manufacturer, DDE Farm AG (Triesen, Liechtenstein), emphasizes high purity of the active ingredient, which minimizes crop stress when application protocols are followed. "Shetefon" requires precise timing regarding the barley growth stages: application occurs when the crop is maximally receptive to regulatory impact, while minimizing the risk of sterile spike formation. With a hazard class of 3, the product requires standard safety precautions common to modern plant protection products.

Using "Shetefon" allows agronomists to unlock the potential of high-yield barley varieties that are prone to lodging due to rapid stem growth caused by intensive nitrogen fertilization.