Row closure (plant)

Sugar beet field shortly before the row closes

Row closure refers to a point in time at which the cultivated plants from the neighboring rows cover the space in between.

The following definition was developed for row cropping sugar beets:

The row closes in the calendar week in which leaves of more than 90% of the plants in adjacent rows touch or overlap.

The row closure for beets is in a phase with high leaf growth, usually the row closure for beets in Germany takes place in mid-June.

consequences

From the end of the row, potatoes show a relatively strong weed-suppressing effect.

The time of the series connection is important for a wide range of measures.

• The row closure is the point in time when the beets should be fertilized with boron for the first time .
• The high leaf mass leads to a change in the microclimate : The temperatures in the stand are slightly lower and the air humidity is slightly higher. Thus, the appearance of Cercospora beticola is favored from the end of the row .
• Weeds can be combated mechanically and chemically without problems up to the end of the row. Later, the crop plants are damaged. Splash shadows occur during plant protection : the cultivated plants completely or partially cover the weeds so that they cannot be combated. The favorable microclimate then leads to late weed growth .
• Shortly before the row closes, potatoes usually have the first infections with late blight and tuber rot . The start of spraying with late blight fungicides should therefore fall within this period.

Web links

• Stages of development of the sugar beet

Individual evidence

1. ↑ IPS-Zuckerrübe.de page 4 (PDF; 212 kB)
2. ↑ oekolandbau.de ( Memento of the original from July 18, 2013 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 356 kB) 
3. ↑ frankenrueben.de  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.  
4. ↑ Zuckerrübe.ch ( Memento of the original from September 28, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 190 kB) 
5. ^ LfL Bavaria