COVER CROPS in South African Vineyards

ally. yearly. ally.

COVER CROPS IN SOUTH AFRICAN VINEYARDS

annually. two-yearly.

3,50

3,00

No cover crop Grazing vetch. Sown annually. Grazing vetch. Sown two-yearly. Paraggio medic. Sown annually. Paraggio medic. Sown two-yearly. Pink Serradella. Sown annually. Pink Serradella. Sown two-yearly. Woogenellup clover. Sown annually. Woogenellup clover. Sown two-yearly.

2,50

2,00

1,50

1,00

0,50

Dry-matter production of weeds in tonnes per hectare

0,00

1997

1995

1996

1998

.

.

FIGURE 5.37. Dry-matter production of winter-growing weeds in legume cover-crop treatments compared to a control without a cover crop in the Lower Orange River region. Adapted from Fourie (2005).

FIGURE 5.38. A serious infestation by common couch occurred in this perennial dwarf-fes - cue cover crop. The couch had to be controlled using a post-emergence herbicide, which destroyed a large area of the cover crop. (Photo: ARC Infruitec-Nietvoorbij).

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