COVER CROPS in South African Vineyards

CHAPTER 5 WEED CONTROL

35,00 0,00 Chemical Mechanical Chemical Mechanical Chemical Mechanical Chemical Mechanical 2009 2010 2011 2012 Dry-matter production of weeds in g per 0.5 metre 2 FIGURE 5.33. Species composition of the dry matter produced by winter-growing weeds in treatments with Caliente at Blaauwklippen. Adapted from Fourie (2017a). 0,00 Chemical Mechanical Chemical Mechanical Chemical Mechanical Chemical Mechanical 2010 2011 2012 2013 Dry-matter production of weeds in g per 0.5 metre 2 FIGURE 5.34. Species composition of the dry matter produced by summer-growing weeds in treatments with Caliente at Blaauwklippen. Adapted from Fourie (2017b). 30,00 25,00 20,00 15,00 10,00 5,00 120,00 100,00 80,00 Common dubbeltjie Crab finger grasses Flax-leaf fleabane Prostrate knotweed Natal red-top Common couch 60,00 40,00 20,00 These results are presented to illustrate how the species composition of both winter- and summer-growing weeds change over time, depending on cover crop and management practices. Musk herons bill, wild radish, and ryegrass were the biggest components of the winter-growing weed stand. Only Pallinup oats was able to suppress Wild radish Musk herons bill Ryegrass

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