Variety traits

Sunflower lodging

Helianthus annuus L.

Sunflower lodging is the loss of plant stability, leading to yield reduction and difficulties in mechanical harvesting. A distinction is made between root lodging, due to weakened root anchorage in the soil, and stem lodging, resulting from stem breakage or bending.

In the reference 1 035 varieties crop Sunflower, where this is mentioned in the description.

In the state variety testing system, sunflower lodging resistance is evaluated on a 5-point scale. The assessment is conducted visually up to harvest, taking into account the plants' ability to straighten. A score of 5 is assigned to non-lodging varieties, while 1 point corresponds to severe lodging that makes mechanical harvesting impossible.

In addition to the point score, specialists record the type of damage, the plant development stage, and the conditions that triggered the phenomenon, such as stand density, weather conditions, or disease infection. The risk of sunflower lodging increases significantly with pathologies that weaken stem and root tissues, for example, Phoma infection.

Key agrotechnical factors for preventing lodging are the optimization of sowing density and balanced nitrogen nutrition, which prevents the formation of excessively thin stems. Morphological features of the plants, including the high windage of the flower head, also play a significant role in resistance to wind loads.

General information about the subject — on the page Lodging.

Sources6

Varieties of Sunflower mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.

Jalon

Active

Helianthus annuus L. · Sunflower

EURALIS SEMILLAS, S.A.

3 records

Insun 277 SU

Active

Helianthus annuus L. · Sunflower

Jean Pierre Dufourcq

IT UA

4 records

Inotop

Active

Helianthus annuus L. · Sunflower

AGRI OBTENTIONS / INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE (I.N.R.A.)

3 records

Hysun 310 SU

Active

Helianthus annuus L. · Sunflower

Neno Nenov

4 records

H09951R

Active

Helianthus annuus L. · Sunflower

Martin Ganssmann

4 records

Guara

Active

Dalena CLP

Terminated

Helianthus annuus L. · Sunflower

prof.Nina Nenova,prof.Galin Georgiev, prof.Valentina Encheva

4 records

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Lodging in other crops

Maize 2 626
Bread wheat 1 845
Barley 1 189
Maize 963
Rapeseed 767
Pea 539
Soybean 455
Triticale 374