1/8/2024 0 Comments Beem stock yahooIdentification of fungi and fungal patho- gens associated with Hypolixus haerens and decayed and cankered stems of Amaranthus hy- bridus. Antinutritional and toxic factors in seed or seed meal, various approaches to detoxify seed meal, and future research and development priorities for their exploitation as animal feeds are presented.īlodgett, J. Most of these seed plants are adapted to various marginal growing conditions in the tropics and can help to mitigate the prevailing deficit in protein and energy sources. This article attempts to highlight two new oilseed crops, Jatropha curcas and Moringa oleifera, and in addition deals with some under-utilized seeds with potential as animal feed. Deficits in conventional protein and energy sources in the tropics have stimulated a quest for alternative feeds both for animals and humans. The conventional seeds cultivated for oil or non-oil purposes, and general aspects of antinutritional factors are not presented here as these have already been discussed widely by many workers. These factors though good for the plant, cause deleterious effects or are even toxic to animals and man. Antinutritional and toxic factors are considered to defend seeds against environmental vagaries and thus help to protect them. Many antinutritional and toxic factors abound in tropical seeds, which are also generally rich in nutrients and therefore more prone to attack from herbivores. Therefore, while it is absolutely critical to select specific species, it is also important to consider the location where the vegetable is obtained. However, great variations of the three nutrients were noted for same species collected in different districts. It is therefore concluded that if utilization and consumption of these vegetables is promoted there is great potential of reducing the 'hidden hunger' caused by deficiencies of the tested nutrients. Highest contents of -carotene were found in african spider flower and puncture vine (up to 16.13 mg per 100g edible portion). Results show high iron contents to occur in the african spider flower and bitter lettuce (of up to 49.95 mg per 100g edible portion), while puncture vine and cape myrtle have high zinc contents (up to 1.631 mg per 100g edible portion). The former analyses were carried out at SUA while the latter were done at the Asian Vegatable Research Development Centre's (AVRDC) laboratories in Taiwan. Atomic Absorption Spectrophotometric (AAS) method was used to determine Iron and Zinc contents while -carotene contents were assessed by High Performance Liquid Chromatography (HPLC) method. The micronutrients included minerals (Iron and Zinc) and -carotene (a common precursor of Vitamin A). Samples were brought to Sokoine University of Agriculture (SUA) where analyses were carried out for selected micronutrients that are known to be among the commonly deficient in the diets of the majority of local people in the country. The districts were namely Kongwa, Muheza and Arumeru. The need for a systematic cultivar development and improvement is alsoīased on focus group discussions and information provided by key informants, non-cultivated indigenous vegetables in three rural districts in Tanzania were identified and collected. This paper reviews the genetic diversity ofĪfrican nightshades and highlights the common agricultural practices for safe and sustainable With increases in consumption and demand, there is an acute need for the rapid domesticationĪnd commercialization of these vegetables. Tonnes ha-1 which compares dismally to potential yields of about 30 tonnes ha-1. Growers of African nightshade obtain yields of about 3.0 Integration of these crops into mainstream horticulture has been very slow,ĭue to low leaf yields that are considered uneconomical compared to other high yielding and Moreover,įarmers grow these vegetables primarily for their own consumption and sell only what isĬonsidered excess. Urban areas through the supermarkets, groceries, retail-markets and hotels outlets. This has been brought about by the increased demand of these vegetables in the Currently, the production ofĪfrican nightshades is undergoing transformation from kitchen gardening to market Vegetables has been on a rapid and steady rise in recent years. Realization of their high nutritional value, medicinal and health benefits, the demand for these Increase, making them promising alternative cash crops locally, and for export. Notably, the consumption of these vegetables is on the ![]() Vegetable has been gradually introduced to urban areas through rural-urban migration, The geneticĭiversity in these vegetables is quite huge and rich for possible improvement work. Vegetables traditionally consumed by rural communities in most parts of Africa. African nightshades (Solanum nigrum-related species) are important indigenous green leafy
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