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The two types of secondary metabolites are: (1) Alkaloids and (2) Dioscorea. It is a rich source of carboh ydrates and a good source of vitamins an d minerals. The biological functions and various types of alkaloids are discussed hereunder. The experiments were performed Give the biological source, Chemical constituents and uses of any two volatile oil drugs; Give the biological source, Chemical tests and uses Benzoin; Describe the microscopy of Clove with a neat labeled diagram; Give the biological source, Chemical constituents and uses of any two alkaloid drugs It is hardy to zone (UK) 5. It is in flower from September to October. (Report) by "Florida Entomologist"; Biological sciences Beetles Biological pest control Food and nutrition Growth Pests Biological control Potatoes Diseases and pests Restaurants Serturner in 1806. Dioscorea batatas is a PERENNIAL growing to 3 m (9ft) by 1.5 m (5ft). Yam (Dioscorea spp.) Alkaloids: Alkaloids have been known to man for several centuries. ADVERTISEMENTS: Biological source: Digitalis consists of dried leaves of Digitalis purpurea Linn. Possibly the best adapted biological control agents will be imported from the area of origin of the invasive D. bulbifera form but … The plants were arranged in a randomized complete block design with six blocks; individual plants were separated by 1 m within a block, blocks were sepa-rated by at least 10 m. Dioscorea • Colour = Slightly brown • Odour = Odourless • Taste = Bitter and acrid • Size = Varies depending on the age of the rhizomes (tubers) 4. However, yam is susceptible to a range of serious and debilitating diseases including viruses. More than 50 compounds of steroidal saponins from plants of Dioscorea L. have been isolated (Tang et al., 2007). After collection leaves are dried immediately at temperature below 60 C and they contain no more than 5% moisture. Morphine, an alkaloid of latex of the opium poppy was isolated by F.W. Extensive phytochemical and pharmacological studies have shown that steroidal saponins have biological activities contributing to the efficacy of the herb (Liu et al., 2010). Physical, chemical and biological aspects of Dioscorea yams and potential value additions. distribution, and reproduction in any medium, provided the original author and source are credited. Dioscorea • Synonym = Yam • Biological source :- Part used : dried rhizome Plant: Dioscorea deltoidea Dioscorea tokora Dioscorea composita family : Dioscoreaceae 3. Biological Source Digitalis comprises of the dried leaves of Digitalis purpurea L., belonging to the family Scrophulariaceae. 5 Marks. The plant is not self-fertile. The species is dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required). Abstract Studies were conducted in vitro to determine the antagonistic potential of Trichoderma harzianum for biological control of Fusarium moniliforme isolated from rotted Dioscorea rotundata tubers. Secondary Metabolites # 1. Pharmacognosy of Dioscorea. is an important food source for a large part of the population in tropical regions. Dioscorea, the ornamental plant Tacca chantrieri André (also Dioscoreaceae), plus a plastic plant that offered structure but not a food source (Frye et al., 2010; Table 1). Free Online Library: The effect of food source on survival and development of Lilioceris cheni (Coleoptera: Chrysomelidae), a biological control agent of air potato (Dioscoreales: Dioscoreaceae). source of air potato in Florida, but ongoing and more recent work suggests Asia as the source (W. Overholt, personal communication). 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