Bolting in Autumn-Sown Sugar Beet and the Role of Variety Choice
Anariss technical team
4 min read
The case for autumn sowing
Autumn sowing of sugar beet in Iran's warmer regions lengthens the growing season and, by making better use of winter rainfall, lowers the field's water needs. An earlier harvest also lets sugar factories receive raw material in months when the spring crop is not yet ready. These benefits only materialise when the variety sown is suited to the region's winter conditions.
What is bolting?
Sugar beet is a biennial plant, and long exposure to winter cold can push it into its reproductive phase ahead of time. When that happens, the plant puts out a flowering stalk instead of storing sugar in its root. The result is lower root weight, lower sugar content and harder mechanised harvesting, and fields with a high bolting rate suffer considerable economic losses.
Genetic resistance is the key
The most important tool against bolting is choosing varieties with genetic resistance to it. These varieties keep growing vegetatively and storing sugar in the root even after a winter. Sowing on the recommended date for each region also keeps young plants out of high-risk conditions.
What to look for when choosing seed
When choosing autumn sugar beet seed, look beyond bolting resistance to root tonnage, sugar content, tolerance of the region's common diseases, and field trial results under similar conditions. Anariss evaluates varieties in trial fields before introducing them, so farmers and sugar factories can decide on the basis of real field data.
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