TL;DR: Either the crude extracts of Datura stramonium, Lantana camara and Tridax procumbens or its phytochemicals can be used as effective vector control agents individually or in combination.
Abstract: Objective To evaluate the larvicidal activity of plant extracts on Aedes aegypti. Methods Petroleum ether, Chloroform and aqueous extracts obtained from Acalypha indica, Aerva lanata, Boerhaavia diffusa, Commelina benghalensis, Gompherna sps, Datura stramonium, Euphorpia hirta, Cynodon dactylon, Lantana camara and Tridax procumbens were used for larvicidal activity at concentration of 1000μg/ml and the mortality rate was calculated after 24 and 48hrs. The LC50 for the extracts were also estimated after 24 hrs. Results The petroleum ether extract of Lantana camara, Tridax procumbens and Datura stramonium showed 100% mortality after 48hrs of incubation. Tridax procumbens petroleum ether extract had the least LC50 of 219 μg/ml followed by Lantana and Datura with 251and 288 μg/ml respectively. A combination of petroleum ether extracts of Aerva lanata and Cynodon dactylon, Boerhaavia diffusa and Commelina benghalensis exhibited 100% mortality of larvae. Formulation-1 inhibited the metamorphosis of the larvae by retaining 60% in its larval stage. Petroleum ether extracts of Lantana, Tridax, Datura and a combination of extracts were effective larvicide. The formulations proved to be effective in inhibiting the metamorphosis. Alkaloids and flavonoids were present in datura petroleum ether extract. Conclusions Either the crude extracts of Datura stramonium, Lantana camara and Tridax procumbens or its phytochemicals can be used as effective vector control agents individually or in combination.
TL;DR: Of the remaining genera, Galinsoga is probably most closely related to Tridax, and can be readily distinguished from tridax by several features, briefly enumerated as follows.
Abstract: Tridax is a Mexican, Central American, and South American genus with its greatest concentration of species in Mexico. One weedy species, T. procumbens, has been widely introduced in the tropical and subtropical regions of the world. This genus is a member of the tribe Heliantheae, subtribe Galinsoginae. Hoffmann (1894), De Candolle (1836), Bentham (1873, p. 446), and Bcntham and Hooker (1876) have included Galinsoga, Calea, Balduina, Marshallia, Blepharipappus, Dubautia, Raillardia, and Bebbia (the latter 2 only by Hoffmann) with Tridax in Galinsoginae. A modern conspectus of Galinsoginae would exclude some of the genera placed in that subtribe by earlier workers. Carlquist (1959) excludes, on the basis of anatomical evidence, Blepharipappus, Dubautia, and Raillardia, assigning them to the subtribe Madinae. Rock (1957) and Turner et al. (1961) point out a closer relationship of Balduina (including Actinospermum) to genera now included in the tribe Helenieae. Cronquist (1955, p. 496) notes that Marshallia is probably anomolous in Galinsoginae, and suggests a closer relationship with Vernonieae or Eupatorieae. Of the remaining genera, Galinsoga is probably most closely related to Tridax. Species of Tridax having a pappus of ciliate or fimbriate scales and glabrous or puberulent achenes have been confused with Galinsoga. However, Galinsoga can be readily distinguished from Tridax by several features, briefly enumerated as follows:
TL;DR: In this article, an extract from the medicinal plant Tridax procumbens was immobilized on Polycaprolactone (PCL) electrospun nanofibers due to its beneficial surface property and biocompatibility.
Abstract: To overcome the bacterial infection which may leads to strain the wounds progressively, wound healing medicinal plant was choosen to treat the infection caused by bacteria. Though the medicinal wound healing plants are resistant to bacteria, the bare plant extract may face poor contact with the wound. This necessitate for a carrier for the plant extract. Polycaprolactone (PCL) electrospun nanofibers have been selected as carrier in this work due to its beneficial surface property and biocompatibility. Extract from the medicinal plant Tridax procumbens was immobilized on PCL electrospun nanofibers. The PCL nanofiber and Tridax procumbens extract immobilized nanofibers were characterized by SEM, XRD and EDAX. The morphology, porosity, swelling and weight loss percentage of the electrospun nanofibers have been investigated. The Tridax procumbens-PCL nanofibers were analyzed for its anti-bacterial activity. The results of the work confess that the scaffolds act as an enhancer of wound healing and treating surfaces that contain pathogenic microorganisms especially in hospital environment.
TL;DR: In vitro generated callus can be used as a source for the isolation of secondary metabolites from Tridax plant.
Abstract: Tridax procumbens is a common weed plant belonging to the family Asteraceae . The leaf juice has antiseptic, insecticidal and parasiticidal properties. The present work is based on developing a protocol for the callus induction in Tridax procumbens from various explants like leaf, internodes and shoot apical buds. The sterilized explants were inoculated in MS media containing various combination of auxins such as 2, 4, dichlorophenoxy acetic acid (2, 4-D) and naphthalene acetic acid (NAA) and cytokinins such as kinetin and 6 benzyl amino purine (BAP). Leaf and apical bud explants showed early and profuse callus induction whereas internodal explants showed comparatively delayed but profuse callus induction. Leaf and apical bud explants showed maximum response in terms of callus by using MS media with the combination 2, 4-D 0.5mg/lit and BAP 0.5mg/lit which was followed by 2, 4-D 0.5mg/lit and KIN 0.5mg/lit, 2, 4 -D 0.5mg/lit and BAP+KIN 0.5 mg/lit, NAA 0.5mg/lit and BAP 0.5mg/lit, NAA 2mg/lit and BAP 0.5mg/lit respectively. Whereas internodal explants showed maximum callus induction by using a hormonal concentration of 2mg/lit 2,4, D and 0.5mg/lit BAP. In vitro generated callus can be used as a source for the isolation of secondary metabolites from Tridax plant.
TL;DR: The study findings indicate that bioactive natural products from these plants may be isolated for further testing as leads in the development of new pharmaceuticals in food preservation as well as natural plant-based medicine.
Abstract: Chemical preservatives have been used in the food industry for many years. However, with increased health concerns, consumers prefer additive-free products or food preservatives based on natural products. This study evaluated antimicrobial activities of extracts from Emilia sonchifolia L. (Common name: lilac tassel flower), Tridax procumbens L. (Common name: tridax daisy) and Vernonia cinerea L. (Common name: Sahadevi), belonging to the Asteracea family, to explore their potential for use against general food spoilage and human pathogens so that new food preservatives may be developed. Three methanol extracts of these plants were tested in vitro against 20 bacterial species, 3 yeast species, and 12 filamentous fungi by the agar diffusion and broth dilution methods. The V. cinerea extract was found to be most effective against all of the tested organisms and the methanol fraction showed the most significant (p < 0.05) antimicrobial activity among all the soluble fractions tested. The minimum inhibitory concentrations (MICs) of extracts determined by the broth dilution method ranged from 1.56 to 100.00mg/mL. The MIC of methanol fraction was the lowest in comparison to the other four extracts. The study findings indicate that bioactive natural products from these plants may be isolated for further testing as leads in the development of new pharmaceuticals in food preservation as well as natural plant-based medicine.