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Intermediate Perennial Ryegrass varieties used in Triumph Leys for 2006

Perennial Ryegrass

Perennial Ryegrass is the maincomponent of medium an dlong term leys as well as permanent pasture and is the most widely sown species in the UK. Perennial Ryegrass is classified by heading date, varieties being grouped together as Early, Intermediate and Late. Diploid and Tetraploid varieties are available in each group and the latter tend to offer higher conservation cuts, good palatability, good sugar levels adn winter hardiness but generally have a more open growth habit.

Intermediate Perennial Ryegrass

Intermediate Perennial Ryegrass varieties head from mid to late May. They are a very diverse group and give very high yields under both cutting and grazing. They are often included in short term leys to give durability and quality and are a valuable yield provider inlonger term leys.

AberGlyn (Tetraploid)  21st May/17th May*

IGER bred AberGlyn is recommended by NIAB, SAC and DARDNI and has an enormous first cut silage yield. It has the highest yield of any ryegrass at 1st Cut (SAC). It also has a very high grazing yield with an exceptional spring performance. Very good disease resistance including Crown Rust. Usual tetraploid density.

Magician (Tetraploid) 21st May/18th May*

Magician is high yielding in both first and more especially, second silage cuts and gives very high grazing yields from spring to late Summer. Typical tetraploid sward structure.

Napoleon (Tetraploid) 21st May/18th May*

Napoleon has very good spring growth and gives an outstanding first cut silage yield at 67D. Average tetraploid structure.

Glenstall (Tetraploid) 22nd May/20th May*

A very good dual purpose variety Glenstall has excellent yields under grazing with very good early Spring growth continuing through to Autumn with an excellent late Summer performance. Under conservation Glenstal has a very good yield at 67D and gives and outstanding 1st Cut followed by high yields in the follwoing two cuts. Slightly better than average tetraploid density with average disease resistance.

Aubisque (Tetraploid) 23rd May/22nd May*

Aubisque has good ground cover for a tetraploid and is high yielding under both regimes with good early Spring growth. Its aftermath digestibility is the highest of all intermediate tetraploids on the SAC list. Aubisque has performed well ijn actual animal grazing intake trials.

AberDart 25th May/22nd May*

AberDart an IGER high sugar variety has very good spring growth for its heading date (as good as some early perennial ryegrass varieties heading almost a fortnight earlier) with excellent late Summer and Autumn grazing yields. AberDart is of very high quality under both cutting and grazing with a High Grazing D value score. Very good sward density wth good Crown Rust and Mildew resistance.

Eurostar (Tetraploid) 25th May/23rd May*

A very dense variety for a tretraploid Eurostar has both very high annual and Spring grazing yields. Its high yielding silage cuts are of excellent quality as is its aftermath digestibility. Eurostar, high in Water Soluble Carbohydrates (WSC)(Sugar) has a good grazing D value and very good disease resistance.

Calibra (Tetraploid) 26th May/20th May*

Calibra has a good sward structure for a tetraploid and is an excellent dual purpose variety. It gives a high 1st Cut silage yield of good quality and high grazing output from Spring to late Summer. Calibra is high in sugar having high levels of Water Soluble Carbohydrates (WSC)(Sugar).

Fornax (Tetraploid) 26th May/22nd May*

One of the most dense growing tetraploids giving high silage and grazing yields. Fornax has a high 1st Cut silage yield of good quality and a very good grazing performance expecially in Spring and early Summer. Fornax has very good aftermath digestibility and very good disease resistance particularly to Crown Rust.

AberStar NEW 27th May/26th May*

New IGER high sugar variety with Water Soluble Carbohydrates (WSC)(Sugar) content above AberDart and AberAvon. Grazing yields are the joint highest of all perennial ryegrasses on the NIAB list with exceptional yields from Spring through to Autumn. Good ground cover, similar to AberDart, with similar good early Spring growth. Cutting yields are joint highest of all diploid perennial ryegrasses at 67D. Exceptional quality variety with the best grazing D valule of all perennial ryegrasses. Good resistance to Crown Rust and Mildew. 

Premium 29th May/17th May*

A winter hardy persistent variety with good yields under both cutting and grazing with good mid-season forage quality.

Montova (Tetraploid) 1st June/30th May*

Montova is the highest yielding Intermediate under 1st Cut Conservation and at 67D (NIAB). In SAC trials it is the highest yielding Intermediate under grazing from May through ‘til August. The latest heading Intermediate tetraploid, Montova has excellent yields under both managements. Typical tetraploid density and good grazing D value (SAC).

* The first date alongside each variety refers to the equivalent to 50% ear emergence of that variety in central England in an average season according to NIAB. This will vary with season and altitude. Similar SAC figures taken from an average of their three sites is appopximately 12 days later for each variety.

* The second date after each variety refers to the date at which that variety achieves 67D in an average season. This date would be about one week earlier in Devon and one week later in Northumberland and would also be later at higher altitudes.

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