Five Zucchini varieties and four yellow crook/straight-necked squash were grown in a replicated small plot trial on the Safford Agricultural Center in 1998. Varieties were picked regularly during the growing season. Yields are shown in tabular form and also graphically to indicate how each variety performed throughout the season.

Sixteen sweet corn varieties were grown in replicated small plot trials with two dates of planting at the Safford Agricultural Center in 1999. Candy Corner ranked number one and two in the early and late dates of planting, respectively, and FMX 413 ranked number one in the later date of planting study. Both varieties produced over 2,500 dozen ears per acre. Sugar readings were made and tabulated for all varieties using a portable refractometer.

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The World Health Organization estimates that 4 billion people use herbal medicine for some aspect of primary health care. These herbal products are however mostly used without the necessary clinical trial done to prove their pharmacological activities and, therefore, their quality, efficacy and safety. It was the objective of this study to review the current international guidelines for the evaluation of herbal medicine / to gain a perspective on the number, type and quality of clinical trials that have been done on herbal medicine and to adopt a set of guidelines that could be used to conduct trial on a traditional herbal medicine used in South Africa. To verify these guidelines, a protocol for a clinical trial was drafted and submitted for approval to the regulatory and ethical authorities in South Africa.

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