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Xi19 is the highest yielding NABIM Group 1 wheat variety on the 2007 HGCA Recommended List, with average yields 10% above Malacca. Xi19's unique combination of high yield and quality give it the potential, when correctly managed, to produce excellent gross margins. In NABIM tests Xi19 has performed consistently well and it is liked by the millers because of its white endosperm colour.

Xi19 has performed well when sown as first or second cereal and tended to produce higher yields on the heavier soil types.

GOOD OVERALL DISEASE RESISTANCE

Xi19

Malacca

Hereward

Mildew

7

6

6

Yellow Rust

9

9

5

Brown Rust

7

6

5

Septoria nodorum

6

7

6

Septoria tritici

5

5

6

Eyespot

4

4

4

Fusarium Ear Blight

5

6

5

Xi19 has very good overall disease resistance particularly for Mildew (7), Yellow rust (9) and Brown rust (7). Septoria tritici resistance is similar to Malacca and Hereward.

RESPONSIVE TO PLANT GROWTH REGULATORS

Xi19

Malacca

Hereward

Claire

Straw Height (cm) Untreated

94

84

86

88

Resistance to lodging (no PGR)

4

7

8

6

Resistance to lodging (with PGR)

7

8

9

7

Xi19 is a relatively tall variety of medium straw length with large fertile heads giving an impressive crop appearance. Like Rialto, one of its parents, Xi19 is responsive to plant growth regulator (PGR) use and has a similar lodging
resistance to Claire when both are treated.

Numerous trials have consistently shown the benefit of a sequential pgr programme on Xi19 with chlormequat alone, applied as either a single or split application, reducing height by about 7%. In sequence with an ethephon based material (e.g. Terpal1) crop height has been some 13% lower than where no pgr was used.

Lodging risk can also be lessened through the use of lower seed rates, later sowing and avoiding early applications of nitrogen, especially where crops are forward or have high tiller numbers.

GRAIN QUALITY ATTRACTIVE
TO UK MILLERS

Xi19

Malacca

Hereward

NABIM Group

1

1

1

Endosperm texture

Hard

Hard

Hard

Protein content (%)

11.7

12.4

13.2

Hagberg Falling Number

280

298

241

Specific weight (kg/hl)

75.7

75.2

79.1

Thousand Grain weight (gms)

52.0

45.7

48.7

Resistance to Sprouting

6

6

6

Xi19 is a relatively tall variety of medium straw length with large fertile heads giving an impressive crop appearance. Like Rialto, one of its parents, Xi19 is responsive to plant growth regulator (PGR) use and has a similar lodging
resistance to Claire when both are treated.

Numerous trials have consistently shown the benefit of a sequential pgr programme on Xi19 with chlormequat alone, applied as either a single or split application, reducing height by about 7%. In sequence with an ethephon based material (e.g. Terpal1) crop height has been some 13% lower than where no pgr was used.

Lodging risk can also be lessened through the use of lower seed rates, later sowing and avoiding early applications of nitrogen, especially where crops are forward or have high tiller numbers.

SUITABLE FOR LATE SOWING

RL trials

Late sown RL trials

UK Yield % Treated Controls (t/ha)

104(10.2)

108(9.7)

Resistance to Lodging with PGR

7

8

Straw Height

94

83

Protein Content

11.7

11.9

 

In late autumn sown trials Xi19 maintained its high yield potential and had better standing power, shorter straw and a higher protein content in comparison with the trials sown earlier.

The latest safe sowing date for Xi19 is the end of February, one month later than Malacca and Hereward.

All information is a partial extraction from the nickerson website and also the HGCA Recommended List 2007/8. See www.nickersonuk.com and also www.hgca.com for the full dataset