scholarly journals Mosquito Repellent Activity of Tridaxprocumbens Leaves- A Commercial Product

2020 ◽  
Vol 6 (12) ◽  
pp. 342-347
Author(s):  
Sabarinath .K, Logeshwaran .V, Sandhiya.S Ishwarya .R, Kousalya.N and Arun.P
Keyword(s):  
Wound Healing ◽  
Seed Germination ◽  
Sea Water ◽  
Repellent Activity ◽  
Commercial Product ◽  
Mosquito Repellent ◽  
Tropical Regions ◽  
Insecticidal Property ◽  
Tropical America ◽  
Asteraceae Family

Tridaxprocumbeans is a weed plant native to tropical America and also seen in other tropical regions. Recent studies on the seed germination of Tridaxprocumbeansshowed that they are pH resistance and they are able to grow in sea water. Although Tridaxprocumbeansis used as a medication plant in Ayurveda, the plant is famous for its wound healing and anticoagulation activity in modern days. As it is the asteraceae family, WHO claims that terpenoids and triterpenoids present in them have a strong insecticidal property. This study is carried to know the insecticidal property of tridaxprocumbensleaves against mosquitos.

scholarly journals Absolute Configuration of a New Mosquito Repellent, (+)-Eucamalol and the Repellent Activity of Its Epimer

1995 ◽  
Vol 59 (6) ◽  
pp. 1139-1141 ◽  
Author(s):  
Atsushi Satoh ◽  
Hisashi Utamura ◽  
Teruhiko Nakade ◽  
Hiroyuki Nishimura
Keyword(s):  
Absolute Configuration ◽  
Repellent Activity ◽  
Mosquito Repellent

Effect of Sea Water on Seed Germination in Two Pacific Atoll Beach Species

Ecology ◽  
1969 ◽  
Vol 50 (4) ◽  
pp. 730-734 ◽  
Author(s):  
G. L. Lesko ◽  
R. B. Walker
Keyword(s):  
Seed Germination ◽  
Sea Water

scholarly journals 908 PB 533 STUDIES ON NATURE OF SALT TOLERANCE IN OKRA

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 564b-564
Author(s):  
Kh. A. Okasha ◽  
R. M. Helal
Keyword(s):  
Salt Tolerance ◽  
Seed Germination ◽  
Plant Development ◽  
Sea Water ◽  
Saline Water ◽  
Tap Water ◽  
Total Yield ◽  
Gold Coast ◽  
Electronic Conductivities ◽  
High Level

Salt tolerance of four okra cutivars namely : white velvet ; Gold coast ; Balady and Eskandarani, were investigated during three different stages of plant development namely : seed germination, seedling and reproductive stages. At both first and second stages of plant development various concentrations of sea water (diluted with tap water) were used for irrigation while at the third stage, various saline water with different electronic conductivities were used for irrigation Results of these studies revealed that salinity reduced and delayed seed germination At this stage, white velvet cv. appeared to be tolerant to salinity. At the seedling stage, salinity generally reduced hash weight of plant for all tested cuitivars and Gold coast was the lead affected one At the reproductive stage, salinity reduced plant growth and total yield/plant but with different degrees depending upon cultivar In this respect, yield of both Gold coast and Balady was not greatly reduced at the high level of salinity The anatomical studies showed that salinity reduced xylem and phloem elements in okra roots depending upon both salinity level and cultivar Generally, the obtained results suggest that both Gold coast and Balady okra cultivars can considered as tolerant genotypes to salinity and recommended for cultivation in both and and semi-arid lands where salinity is considered a potential problem

scholarly journals Merremia aegyptia (hairy woodrose).

2020 ◽  
Author(s):  
Fabiola Areces-Berazain
Keyword(s):  
Pioneer Species ◽  
Tropical Regions ◽  
Tropical America ◽  
Environmental Weed

Abstract Merremia aegyptia is an annual climbing herb that acts as a pioneer species in disturbed sites in tropical regions. It is considered a weed in most countries where it occurs and it has been included in the Global Compendium of Weeds as an agricultural and environmental weed (Randall, 2012). The species is native to tropical America and Africa and listed as invasive in Cuba, India, Australia and Hawaii.

scholarly journals Genetic Variation and Relationships among Frangipani Cultivars

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1001B-1001
Author(s):  
Alan W. Meerow ◽  
Richard Criley ◽  
Raymond J. Schnell
Keyword(s):  
Genetic Relationships ◽  
Germplasm Collection ◽  
Breeding Behavior ◽  
Tropical Regions ◽  
Tropical America ◽  
Dry Conditions ◽  
Ssr Loci ◽  
The University ◽  
Trees And Shrubs ◽  
Mexican Species

Plumeria is a small genus of succulent trees and shrubs in the Apocynaceae native to tropical America. It is favored as a landscape ornamental in tropical and tropical regions due to its tolerance of hot, dry conditions, ease of propagation, and long season of bloom. Flowers of certain varieties are important components of leis in Hawaii. Numerous cultivars have been developed, chiefly from either seedling selections of P. rubra, a Mexican species, and P. obtusa, broadly distributed in the Caribbean basin, or hybrids between these species and among older cultivars. Little is known of the breeding behavior of the species in nature or cultivations, but very few of the cultivars set an abundant number of fruits. We used 21 microsatellite DNA (SSR) loci developed in our lab from Plumeria rubra to investigate the genetic relationships of 83 cultivars of Plumeria from a germplasm collection at the University of Hawaii, now duplicated in Miami. All 21 loci were highly polymorphic, with three to 15 alleles observed across the cultivar population. Six of the 21 loci exhibit heterozygote excess across the cultivars; the majority of the remaining 15 have an excess of homozygotes, suggesting that the cultivars are largely inbred. Clustering with Bayesian analysis suggests that there are five main groups represented among the cultivars, with varying degrees of admixture among the five. The data also suggest that identical genotypes have received different cultivar names at times. We are also analyzing seedling populations from fruits spontaneously set on several cultivars to determine if they are predominantly the result of self-pollination or out-crossing.

scholarly journals Application of molecular topology to the prediction and optimization of mosquito repellent activity of N-acyl-piperidine derivatives

2017 ◽  
Author(s):  
Ramón García-Domenech ◽  
Maria Angeles Martinez Rodriguez ◽  
Raimundo Segui Lopez-Peñalver ◽  
Gemma Alcacer Tomas ◽  
Jorge Galvez ◽  
...  
Keyword(s):  
Repellent Activity ◽  
Molecular Topology ◽  
Mosquito Repellent

Chemical Composition and Repellent Activity against Mosquito Aedes Aegypti of Pelargonium radula, Syzygiumaromaticum and Citrus aurantifolia Essential Oils

2020 ◽  
Vol 981 ◽  
pp. 253-257
Author(s):  
Hazrulrizawati Abd Hamid ◽  
Nishantini Silvarajoo ◽  
Nurulhusna Ab. Hamid
Keyword(s):  
Chemical Composition ◽  
Essential Oil ◽  
Aedes Aegypti ◽  
Essential Oils ◽  
Dengue Fever ◽  
Yellow Fever ◽  
Repellent Activity ◽  
Mosquito Repellent ◽  
Citrus Aurantifolia ◽  
Frequent Use

The mosquito Aedes aegypti is an epidemic vector of several diseases such as dengue fever and yellow fever. Several pesticides are used to control the mosquito population. Because of their frequent use, some mosquitoes have developed resistance. In the present study, we evaluated the synergistic mosquito-repellent activity of essential oils from Pelargonium radula, Syzgium aromaticum and Citrus aurantifolia against Aedes aegypti by using Y-tube olfactometer. The oils was subsequently analyzed by using GC–MS. These results clearly reveal that the essential oil of C. aurantifolia served as the most potent repellent agent against Aedes aegypti . The results indicate that three constituents; limonene (19.58%) followed by β–pinene (17.12%), geraniol (13.23%) which comprise a large proportion of the C. aurantifolia are likely responsible for the observed repellent activity.

Development and Evaluation of Herbal Mosquito Repellent Cream

2021 ◽  
pp. 6262-6268
Author(s):  
Bapan Banik ◽  
Jayanta Barman ◽  
Manash Pratim Dutta ◽  
Nikita Bhowmick
Keyword(s):  
Repellent Activity ◽  
Cross Resistance ◽  
Allergic Reactions ◽  
Vitex Negundo ◽  
Mosquito Repellent ◽  
Leaf Extracts ◽  
Development Of Resistance ◽  
Different Types ◽  
Safe Product

Mosquito repellent is a product that is applied to the skin or other surfaces to deter insects (and arthropods in general) from landing or climbing on that surface. The interest in plant-based repellants has been revived seeing that the development of resistance, cross-resistance and possible toxicity hazards associated with synthetic insecticides and their rising cost. The present study aimed towards the development and evaluation of safe and efficient herbal mosquito repellent from leaf extracts of Azadirachta indica, Vitex negundo, and Ocimum gratissimum. Six different types of formulation (Type-1 to 6) were prepared using each plant extract and optimized ingredients. The mosquito repellent activity of the formulation was tested using the arm-in-cage method. One skin rubbed with a small quantity of formulation was exposed to 20 mosquitoes and the number of mosquitoes that aligned or biting the arm was recorded in each minute for five minutes. The most effective repellent activity of the Type2 formulation was 87.5% (Y-shaped Model) and 91.62% (Rectangular-shaped Model). The Type1, Type3, Type4, Type5 and Type6 formulation showed 66.62% , 58.25%, 68.75%, 70.75% and 62.5% repellent activity in Y shaped model and 66.62%, 62.5%, 70.75%, 83.25% and 62.5% repellent activity in Rectangular shaped model respectively. During these studies, we found that Hexane extract showed higher repellent activity. No allergic reactions were observed upon the skin. So, it is a safe product. The formulation was ecological, economical and highly efficient.

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