SF Rosabrook

New breakthrough red legged earth mite tolerant sub-clover for increasing
pasture legume content

SF Rosabrook was developed by the National Annual Pasture Legume Improvement Program (NAPLIP) as a replacement for cv. Denmark with improved cotyledon tolerance to Red-Legged Earth Mite (RLEM). It results from a single backcross, with cv. Denmark as the recurrent parent, and has a flowering time of 143 days from an early May sowing in Perth, the same as Denmark.  SF Rosabrook is suited to well drained, moderately acid (pH CaCl2 4.5–6.5) soils in areas of southern Australia where the growing season extends to mid-late November, corresponding to a minimum annual rainfall of approximately 650 mm.

It is well suited to permanent pasture systems, but should regenerate strongly following occasional years in crop. It is not suited to 1:1 crop/pasture rotations.

Agronomic features:
  • Red-Legged Earth Mite tolerance
    Improved establishment. Greater first year yields. Reduced need for insecticide application costs

  • Late flowering
    Produces more feed in high rainfall zone

  • High yielding
    Produces more feed per hectare. Produces lower cost feed

Forage EBV’s – compared to industry standards*

SUB CLOVER WINTER YIELD SPRING YIELD PHYTHOPHTHERA IMPACT % CLOVER SCORCH IMPACT % RLEM DAMAGE
% light infestation
% HARD
SEEDED-NESS
DAYS TO FLOWERING
RACE 177 RACE 173 RACE 1 RACE 2 PERTH WAGGA
SF Rosabrook 118 105 10 22 20 40 13 29 143 150
Denmark 100 100 16 18 10 30 33 14 143 150
Coolamon 115 91 18 42 0 20 33 30 135 138
Goulburn 101 103 12 60 30 20 29 33 135 145
Leura 106 118 28 52 30 30 38 12 150 156
Karridale 81 94 28 94 40 60 39 18 140 146
Mt Barker 78 102 36 84 70 70 40 4 137 143

* Forage comparisons developed from data supplied by DAFWA based on trials at Casterton and Heywood (Vic), Gerogery and Harden (NSW), Mt Barker (WA) and Narracoorte (SA).
* Impact measures % damage when disease was present.

Sowing rate

5-10kg/ha
Sole species

2-5kg/ha
pasture mixes

Stock suitability

All livestock types
Silage & hay

Maturity

late flowering

Australian release

>2011