Therefore, the objective of this study was to investigate the effect of temperature on the germination and emergence
and the effect of light on seed germination of a selection of these vegetable species. Pigweed (Amaranthus cruentus L.), nightshade (Solanum retroflexum Dun.), non-heading Chinese cabbage (Brassica rapa L.subsp. chinensis), spider flower (Cleome gynandra L.), tsamma melon(Citrullus lanatus Thunb.), Jew's mallow (Corchorus olitorius L.), pumpkin(Cucurbita maxima Duchesne) and Vigna unguiculata (L.) Walp. were selected for the study, because they are already being cultivated
or have considerable potential to be developed into cultivated species