Sugar beet (Beta vulgaris L. var. saccharifera) is the sole domestic feedstock for sugar production — a strategically important food staple. The economic efficiency of beet-sugar production depends not only on gross root yield per hectare, but also on the roots’ processing quality, whose key indicator is extractable sugar yield. This indicator reflects the amount of sucrose that can actually be recovered from the raw material under factory conditions, and depends on the roots’ sugar content, their juice purity, and their non-sugar content. Modern agronomy has a physiologically grounded technique for actively influencing this indicator during the final growth phase — senication.
The physiological basis of sugar accumulation: the role of assimilate outflow
Sugar beet is a crop with a long growing season and a distinctive physiology of reserve-substance accumulation. Unlike cereals, whose ripening has clear visual markers, sugar beet keeps adding significant root growth right into late autumn, while sugar content rises noticeably as sugar moves out of the leaves and into the root. Field observation data confirm this pattern: from early August to late October, yield can increase by more than 50%, and sugar content by nearly 30%.
The key physiological process determining the root’s final sucrose content is remobilisation — the outflow of previously synthesised leaf assimilates (sucrose above all) into the storage organ. Under natural conditions, this process is spread out over time and doesn’t reach its full potential, since some of the plastic substances remain in the vegetative mass and don’t make it into the root before frost sets in or the harvest window arrives.
Senication (from the Latin senescere, “to age”) is an agronomic technique aimed at artificially triggering and accelerating the plant’s natural ageing processes. Its physiological premise is to activate the enzyme systems responsible for hydrolysing stored polymers in leaf and stem tissue into simple sugars, which are then transported via the phloem into the root. According to expert assessments, senication increases the volume of photosynthate transferred from the vegetative part into the root by 20–25% compared with natural ripening.
From senication to quality: the effect on extractable sugar yield
Boosting assimilate outflow through senication drives a broad improvement in the roots’ processing indicators:
Higher sugar content. Increased sucrose inflow into the root directly raises its concentration in the cell sap — the main driver of higher extractable sugar yield during processing.
Higher dry-matter content. Senication promotes the accumulation not only of sugars but also of other soluble dry substances in the root. This, in turn, lowers the water content of the cells, reducing the risk of pathogen damage to the roots during harvest and storage.
Improved juice purity. Intensified sugar outflow from the leaves goes hand in hand with lower non-sugar content (soluble nitrogen compounds, ash) in the root, which reduces processing losses during extraction.
Lower nitrate content. Senication agents drive the conversion of stored nutrients into plastic substances, which comes with a reduction in nitrate content in the finished product.
Foliart Senicant: composition, mechanism of action and application rates
Foliart Senicant is a specialised organomineral product developed to implement a senication strategy in sugar beet. Its formulation is balanced for the tasks of the final growth stage: nitrogen (20 g/L), phosphorus (50 g/L), potassium (50 g/L), sulphur (10 g/L), magnesium (4 g/L).
Mechanism of action. The product works by stimulating the enzymatic pathways of reutilisation — the processes responsible for mobilising stored nutrients and converting them into transport forms. Senicant boosts the conversion of stored nutrients into plastic substances, speeds up maturation, and drives the outflow of sugars and amino acids from the leaf canopy into the storage organ. Critically, the product is not a herbicide and contains no synthetic hormones, so it does not cause premature leaf drop and works in a physiologically gentle way.
Application rate for sugar beet. The optimal timing for senication is two to three weeks before the start of harvest. This is the window in which the plant still retains enough metabolic activity for efficient assimilate outflow, while already entering the phase of natural vegetative-growth slowdown.
Recommended Foliart Senicant rates for sugar beet: - 1 L/ha at a spray volume of up to 300 L/ha; - 1.5 L/ha at a spray volume of 400 L/ha.
The treatment is applied as a foliar spray, ensuring even coverage of the leaf surface.
Enhancing the effect with micronutrients. To make the most of senication’s potential, it’s recommended to add micronutrients — manganese, boron and magnesium — to the tank mix with phosphorus-potassium fertilisers. These elements activate the transport of plastic substances into the root, boosting the accumulation of valuable components.
Conclusion
Senication of sugar beet isn’t an attempt to fix earlier nutrition mistakes — it’s a fine physiological tool for managing quality at the final stage. Applying Foliart Senicant activates the natural processes of assimilate remobilisation, increasing the outflow of sugars from the leaves into the root by 20–25% compared with natural ripening. The result isn’t just higher sugar content — it’s a higher extractable sugar yield during factory processing, which translates directly into the economic performance of the entire beet-sugar operation. When every half a percentage point of sugar content means a meaningful gain in revenue per hectare, senication moves from being an optional technique to a technological necessity.
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