Winetech Technical Yearbook 2022

Barpower forage rye Venice white mustard Total mix

Cereal Legume

35 2 37

7.3 2.3 9.6

2

Weeds

0.0

The mix of forage rye and white mustard produced an impressive 9.6 t/ha of DM and effectively suppressed weeds. Cost: R720/ha

Barsaia saia oats Tajuna fodder radish Haymaker grazing vetch Total mix

Cereal Brassica Legume

25 1 6 32

5.2 3.0 0.0 8.2

3

Weeds

0.0

The saia oats was the largest component of the mixture and was not yet in seed at the time of harvesting, but still produced 5 t/ha DM. This species has a later-growing season than other cereals. The fodder radish performed well in this mix and produced 3 t/ha DM, however, the vetch was suppressed by the other two components. Weed suppression was excellent. Cost: R835/ha

* DM = Dry Matter Production (tons/hectare). At the Cilmor demo, the bankies were sprayed with herbicide just prior to harvesting the demo plots in late September and some spray drift resulted in a degree of termination of the mixtures. The results of this demo were nevertheless very promising with excellent biomass produced across all three plots, particularly plot 2 and 3.

REGION: BREEDE RIVER VALLEY District: Breedekloof Site: Diepkloof Soil description: Heavy clay Vineyard irrigation: Drip Sowing date: Middle May Sowing method: By hand Harvested: Late September 2021

Seeding rate (kg/ha)

DMP (t/ha)

Plot

Variety/species

Type

Observations

Barsaia saia oats Scala brown mustard Total mix

Cereal Brassica

35 2 37

6.1 1.3 7.4

1

Weeds

0.0

This mixture performed the best out of the three in terms of biomass produced. The saia oats performed very well, while the brown mustard growth was patchy. Cost: R810/ha

Barpower forage rye Haymaker grazing vetch Venice white mustard Total mix

Cereal Legume Brassica

35 6 1 42

4.0 0.0 2.6 6.6

2

Weeds

0.0

The forage rye and white mustard performed well in the mixture, but the grazing vetch was unsuccessful. The weed suppression was very good. Cost: R980/ha

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WINETECH TECHNICAL YEARBOOK 2022