Masters Degrees (Agricultural Economics)

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Browsing Masters Degrees (Agricultural Economics) by browse.metadata.advisor "Agenbag, G. A."

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    Chemiese beheer van Bromus diandrus Roth. in Triticum aestivum L. met clomazone en foraat
    (Stellenbosch : Stellenbosch University, 1996-03) Barry, Renaldo Jean; Agenbag, G. A.; Stellenbosch University. Faculty of AgriSciences. Department of Agricultural Economics.
    ENGLISH ABSTRACT: Three glasshouse trials were conducted at the Welgevallen experimental farm to determine whether phorate protects Triticum aestivum L. against damage by clomazone without reducing the effect on Bromus diandrus Roth., whether there are differences in the tolerance of wheat cultivars against clomazone, and whether soil type has an Influence on the effectiveness of clomazone and phorate. With the placing of phorate in the planting furrows, clomazone has given satisfactory control of Bromus diandrus Roth., while phorate gave some protection to T. aestivum L. against clomazone. Slight differences were found in the sensitivity of wheat cultivars and barley (cv. Clipper) against clomazone. However, in practice these differences should not be significant. In sandy soil clomazone had a short residual effect, while it had a longer residual effect in clay soil. This can be contributed to greater adsorption of clomazone in the clay soil which may present problems in successive crops. It seems as if volatilization of clomazone in the glasshouse contributed to the damage of T. aestivum L. The recovery of I. aestivum L. however indicates that the use of phorate as a protectant against damage by clomazone is a possibility. Further trials however are needed under field conditions.