Obsthormon 24a

Technical Potential of 1-Naphthaleneacetic Acid

At the core of Obsthormon 24a from the Italian manufacturer L. Gobbi s.r.l. is 1-naphthaleneacetic acid (NAA) — a synthetic auxin that deeply integrates into the physiological processes of pome fruits. Unlike generic growth stimulants, this product is engineered for precision hormonal regulation during critical stages of apple and pear development.

Mechanism of Ripening and Abscission Control

The primary engineering objective of Obsthormon 24a is to inhibit the formation of the abscission layer in the fruit stalk. By applying the solution during the pre-harvest maturation period, the agronomist artificially prolongs the connection between the fruit and the parent plant. This provides two critical operational advantages:

• Loss Mitigation: minimizes fruit drop caused by weather conditions or logistics-related harvesting delays.
• Quality Enhancement: the fruit continues to gain weight and accumulate sugars while remaining on the branch for 7–10 days beyond the physiological norm.

Practical Application Parameters

The product is supplied as an aqueous solution, ensuring perfect homogeneity of the working mixture without the need for complex pre-mixing procedures. With a dosage rate of 18–30 ml per 100 liters of water (depending on the target crop and orchard intensity), the product exhibits high biological activity. Foliar application requires precise timing, as the activity of 1-naphthaleneacetic acid is most effective during the initial ripening phase. Classified under hazard class 3, the product allows for the use of standard personal protective equipment, making it easy to integrate into existing orchard protection programs. 1–2 treatments per season effectively neutralize the risk of premature fruit drop, ensuring high-grade market quality for the harvest.