COVER CROPS in South African Vineyards

CHAPTER 5 WEED CONTROL

Reference list Fourie JC and Raath P. 2008. Uitwerking van organiese en geïntegreerde bewerkingspraktyke op die onkruidstand en -samestelling in ’n Sauvignon blanc wingerd in die Paarl wyndistrik. WynlandTydskrif April 2008, 59–63. Fourie JC, Louw PJE and Agenbag GA. 2006. Cover crop management in a Chardonnay/99 Richter vineyard in the Coastal wine grape region, South Africa. 1. Effect of two management practices on selected grass and broadleaf species. South African Journal of Enology and Viticulture , 27(2), 167–177. Fourie JC, Kruger DHM and Malan AP. 2015. Effect of management practices applied to cover crops with bio-fumigation properties on cover crop performance and weed control in a vineyard. South African Journal of Enology and Viticulture , 36(1), 146–153. Fourie JC, Kunjeku EC, Booyse M, Kutama TG and Sassman LW. 2017a. Effect of cover crops, and the management thereof, on the weed spectrum in a drip-irrigated vineyard: 1.Weeds growing during winter and from grapevine bud break to grapevine berry set. South African Journal of Enology and Viticulture , 38(2), 167–181. Fourie JC, Kunjeku EC, Booyse M, Kutama TG, Freitag K and Ochse CH. 2017b. Effect of cover crops, and the management thereof, on the weed spectrum in a drip-irrigated vineyard: 2. Weeds growing from grapevine berry set to post-harvest. South African Journal of Enology and Viticulture , 38(2), 182–191. Little Karoo A study byVan Huyssteen and colleagues looked at the effect of cover crops on soil conditions and weed control in a flood-irrigated vineyard near Oudtshoorn in the Western Cape. The cover crop was sown in March and sprayed with herbicide in August. Dry matter derived from the cover crop was used to mulch the soil surface during the grapevine-growing season. The general trend was that weeds decreased as the amount of mulch on the soil surface increased.The authors concluded that 8 tonnes per hectare of mulch derived from a vetch should be sufficient to control weeds throughout summer.They speculate that this relatively large quantity of mulch is necessary because of increased soil nitrogen in plots with vetch cover crops.

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