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Plant protection

1. Growth regulators

The main reasons for lodging in rye are often over-thick populations or poorly carried out growth regulation measures.

Shortening measures should always be carried out in a sound manner. The population can be best harmonised and effectively shortened from GS 31/32, when the first node stands out from the second, through GS 37. Varieties differ in their resistance to lodging and their reaction to growth regulators. In the following table you will find important factors influencing the application rate for your location.

 

EinflussfaktorenAufwandmenge    
höherniedriger
Bodenartschwerleicht
Aussaatterminfrühspät
Einsatzzeitpunktfrühspät
Temperatur/
Sonneneinstrahlung
geringhoch
Wasserversorgunggutschlecht
Lagerdruckhochgering
Stickstoffversorgunghochgering

Quelle: Eigene Darstellung nach Landwirtschaftskammer Nordrhein-Westfalen, 2008

2. Fungicides

Leaf diseases in rye, such as mildew and rhynchosporium, can be controlled with common plant protection products. A special net blotch or mildew treatment is only necessary under severe infection risk.

Leaf rust infection is a considerable challenge to farmer and expert adviser. To secure the yield formation we recommend a final treatment with the focus on rust control from ear emergence to flowering. However, if leaf rust infection occurs at an early stage (GS 35), it should be treated in time and with a sufficient application rate to be able to control the developing infection. It is not recommendable to treat rye during flowering, as it is a cross-pollinator.

Principally, varieties with a low susceptibility to this disease should be taken into account.

3. Herbicides

In general, it is important when using herbicides to consider the manufacturer’s product information on compatibility and the information of the responsible plant protection service. Caution is primarily recommended for treatment in autumn, if a very low sowing depth was used, on sandy locations, in case of waterlogging and prior to heavy rainfalls. Very late autumn treatments (November) are not advisable, because there is a danger that the growth period might be less than two weeks.

 

 
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