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.
Red-Legged Earth Mite tolerance
Improved establishment. Greater first year yields. Reduced need for insecticide application costs
Produces more feed in high rainfall zone
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
|DAYS TO FLOWERING|
|RACE 177||RACE 173||RACE 1||RACE 2||PERTH||WAGGA|
* 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.
All livestock types
Silage & hay