5 Marks. Physical, chemical and biological aspects of Dioscorea yams and potential value additions. Possibly the best adapted biological control agents will be imported from the area of origin of the invasive D. bulbifera form but … 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 Dioscorea • Synonym = Yam • Biological source :- Part used : dried rhizome Plant: Dioscorea deltoidea Dioscorea tokora Dioscorea composita family : Dioscoreaceae 3. distribution, and reproduction in any medium, provided the original author and source are credited. Biological Source Digitalis comprises of the dried leaves of Digitalis purpurea L., belonging to the family Scrophulariaceae. It is hardy to zone (UK) 5. Pharmacognosy of Dioscorea. The two types of secondary metabolites are: (1) Alkaloids and (2) Dioscorea. 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). Alkaloids: Alkaloids have been known to man for several centuries. source of air potato in Florida, but ongoing and more recent work suggests Asia as the source (W. Overholt, personal communication). However, yam is susceptible to a range of serious and debilitating diseases including viruses. is an important food source for a large part of the population in tropical regions. 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. After collection leaves are dried immediately at temperature below 60 C and they contain no more than 5% moisture. . 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). The plant is not self-fertile. ADVERTISEMENTS: Biological source: Digitalis consists of dried leaves of Digitalis purpurea Linn. Yam (Dioscorea spp.) 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. (Report) by "Florida Entomologist"; Biological sciences Beetles Biological pest control Food and nutrition Growth Pests Biological control Potatoes Diseases and pests Restaurants Dioscorea batatas is a PERENNIAL growing to 3 m (9ft) by 1.5 m (5ft). It is in flower from September to October. It is a rich source of carboh ydrates and a good source of vitamins an d minerals. Serturner in 1806. 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). Extensive phytochemical and pharmacological studies have shown that steroidal saponins have biological activities contributing to the efficacy of the herb (Liu et al., 2010). Secondary Metabolites # 1. More than 50 compounds of steroidal saponins from plants of Dioscorea L. have been isolated (Tang et al., 2007). Dioscorea • Colour = Slightly brown • Odour = Odourless • Taste = Bitter and acrid • Size = Varies depending on the age of the rhizomes (tubers) 4. The biological functions and various types of alkaloids are discussed hereunder. Morphine, an alkaloid of latex of the opium poppy was isolated by F.W. After drying leaves are stored in moisture proof container. The family Scrophulariaceae, provided the original author and source are credited provided the original and! 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