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Late 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.

Late Perennial Ryegrass

These varieties head from early June to mid June and generally have a more prostrate growth habit tending to be more leafy particularly later itn the growing season. They provide very good density and persistence and are the mainstay of longer term leys.

Denver 3rd June/29thMay*

Recommended by SAC and DARDNI where it is the highest yielding late diploid under 1st Cut Conservation on both lists. Denver, one of the earliest heading of the late varieties, forms swards of good density, yields well under both managements and its grazing yields are best in the  main Summer growing season. High in Water Soluble Carbohydrates (WSC)(Sugar).

AberAvon 4th June/30th May*

IGER High Sugar Variety AberAvon has outstanding grazing yiedls and is the highest rated diploid under this management with NIAB and SAC. Excellent aftermath digestibility and grazing D value AberAvon also gives useful silage cuts of very high D value. Excellent Crown Rust resistance.

Elgon (Tetraploid) 4th June/30th May*

Tried and tested good quality late tetraploid recommedned by NIAB and SAC and first listed in 1992. Elgon has high cutting yields with a good yield at 67D together with good mid season digestibility. Excellent Crown Rust resistance and good grazing D valule.

Foxtrot 6th June/26th May*

An excellent dual purpose late variety on all three UK lists. Foxtrot is among the highest yielding diploids when grazed, especially in the early to late Summer period and gives very good silage yields particularly at the 1st Cut.

Loporello (Tetraploid) 6th June/31st May*

Recommended by DARDNI, Loporello has exceptional dense swards fro a tetraploid and gives excellent sialge yields evenly distributed over three cuts of very good quality. Its very good grazing yields are delivered mostly in the early to late Summer period. Loporello has a very high aftermath digestibility, bettered by only one of fourteen recommended late tetraploids and good Crown Rust resistance.

Romark 6th June/29th May*

A good ground cover variety Romark is well suited to grazing where it gives very good yields from early Summer through to Autumn. Although slow to bulk up for conservation Romark produces very good 2nd and 3rd cuts of good quality. It has excellent mid season digestibility and Crown Rust resistance.

Pastour 7th June/25th May*

Pastour is the highest yielding late diploid under a cutting regime over 3 years and has the top yield at 1st Cut on the NIAB recommended list. Also recommended by SAC and DARDNI. Pastour gives excellent grazing yields from early Summer through to Autumn. Very slightly less dense than average Pastour has excellent Crown Rust resistance.

Polim (Tetraploid) NEW 7th June/31st May*

Polim is recommended by NIAB and has very high yields under grazing together with very good early Spring growth. It has high overall cutting yields including an excellent yield at 67D and a very good Crown Rust resistance.

Twymax (Tetraploid) NEW 8th June/30th May*

Excellent variety recommended by SAC and NIAB where it is the highest yielding late perennial under grazing outyielding AberAvon. Twymax has good Spring growth for its heading date and outstanding early and late Sumer grazing yields. It also gives a more than useful Autumn yield. Twymax also has excellent silage yields, only bettered by on other late variety of poorer quality, with very good D values. Twymax has above average density for a tetraploid with very good grazing D values and good disease resistance including resistance to Crown Rust.

Twystar 18th June/3rd June*

A proven late perennial Twystar has been NIAB recommended since 1993 and is the very latest heading of all ryegrass varieties. Twystar has a very high conservation yield at 67D, good early Spring growth for its heading date together with good grazing yields with good mid season digestibility. Good ground cover with excellent disease resistance as regards Crown Rust and Mildew.

* 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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