scholarly journals Adulticidal and repellent properties of indigenous plant extracts against Larvae of mosquito: A Review

2015 ◽  
Vol 1 ◽  
pp. 28-33
Author(s):  
Nithar Ranjan Madhu ◽  
◽  
Bhanumati Sarkar ◽  
Keyword(s):  
Plant Extracts ◽  
Mosquito Control ◽  
Single Step ◽  
Mosquito Population ◽  
Toxic Chemicals ◽  
Extracellular Synthesis ◽  
The World ◽  
Indigenous Plant ◽  
Suitable Property ◽  
Chemical Pesticides

One method of prevention of mosquito borne diseases is the reduction of the mosquito population in the various stages of development, such as the use of ovicidal, larvicidal, pupicidal, adulticidal, and mosquitocidal substances. The application of chemical insecticides in mosquito control has resulted in the persistence and accumulation of non-biodegradable chemicals in the ecosystem, biological magnification through the food chain, insecticide resistance, and a toxic effect in human health and non-target organisms. Many studies on plant extracts against the mosquito population have been conducted around the world. The plant-mediated repellents are advantageous over chemical and physical methods, since it is cheap, single-step, and does not require high pressure, energy, temperature, or the use of highly toxic chemicals. In the latest years, a growing number of plant-borne compounds have been proposed for efficient and rapid extracellular synthesis of metal nanoparticles effective against mosquitoes at very low doses. The present study reveals that the aqueous extract of this leaf has a suitable property for a larvicidal natural product and may replace harmful chemical pesticides.

Natural products from the traditional Moroccan pharmacopoeia: A potential lead for the prevention and treatment of COVID-19

2020 ◽  
Vol 11 (SPL1) ◽  
pp. 1278-1285
Author(s):  
Mohamed Yafout ◽  
Amine Ousaid ◽  
Ibrahim Sbai El Otmani ◽  
Youssef Khayati ◽  
Amal Ait Haj Said
Keyword(s):  
Medicinal Plants ◽  
Plant Extracts ◽  
Molecular Mechanisms ◽  
Scientific Literature ◽  
Treatment Protocol ◽  
World Health ◽  
The World ◽  
Health Organization ◽  
Promising Source

The new SARS-CoV-2 belonging to the coronaviruses family has caused a pandemic affecting millions of people around the world. This pandemic has been declared by the World Health Organization as an international public health emergency. Although several clinical trials involving a large number of drugs are currently underway, no treatment protocol for COVID-19 has been officially approved so far. Here we demonstrate through a search in the scientific literature that the traditional Moroccan pharmacopoeia, which includes more than 500 medicinal plants, is a fascinating and promising source for the research of natural molecules active against SARS-CoV-2. Multiple in-silico and in-vitro studies showed that some of the medicinal plants used by Moroccans for centuries possess inhibitory activity against SARS-CoV or SARS-CoV-2. These inhibitory activities are achieved through the different molecular mechanisms of virus penetration and replication, or indirectly through stimulation of immunity. Thus, the potential of plants, plant extracts and molecules derived from plants that are traditionally used in Morocco and have activity against SARS-CoV-2, could be explored in the search for a preventive or curative treatment against COVID-19. Furthermore, safe plants or plant extracts that are proven to stimulate immunity could be officially recommended by governments as nutritional supplements.

Efficacy of some chemical insecticides and plant extracts combined with Bacillus thuringiensis against Phthorimaea operculella

2021 ◽  
Author(s):  
Fereshteh Khorrami ◽  
Asmar Soleymanzade
Keyword(s):  
Bacillus Thuringiensis ◽  
Methanolic Extract ◽  
Oviposition Preference ◽  
Probit Analysis ◽  
Phthorimaea Operculella ◽  
Hatching Rate ◽  
Methanolic Extracts ◽  
The World ◽  
Chemical Pesticides ◽  
Antagonistic Interactions

Abstract Phthorimaea operculella (Zeller, 1873) is one of the most damaging pests of potatoes in the world. Since the chemical pesticides play a key role in managing of potato tuber moth (PTM), the present study was conducted to assess the efficacy of Proteus®, Takumi®, Avaunt®, Dorsban®, Decis®, Consult® and Vertimec® against neonate larval penetration and one-day-old eggs of P. operculella. But adverse effects of chemical insecticides, actuated researchers to seek secure tools such as medicinal plants and biopesticides like Bacillus thuringiensis Berliner, 1715 for pest managements. Hence, we also examined toxicity of savory, ziziphora and cumin methanolic extracts against the pest under laboratory conditions. We also surveyed the synergistic/antagonistic interactions between the most effective insecticide and methanolic extract with Bt against PTM. Our results showed that both Vertimec® and savory synergized the performance of Bt against neonate larval penetration of P. operculella. Probit analysis of insecticides and methanolic extracts demonstrated that Vertimec® and Takumi® had high toxicities to the neonate larval penetration of PTM which exhibited LC50 values equivalent to 7.09 ppm and 0.008 g L−1, respectively. Savory was the most effective extract against larval penetration and hatching rate of the pest (LC50 = 440.36 and 635.93 ppm, respectively). Oviposition preference demonstrated that Vertimec® and Decis® exhibited inhibitory ovipositional effects against P. operculella.

scholarly journals Evaluation of Some Indigenous Plant Extracts for Suppressing Bipolaris sorokiniana in Wheat Seed

2010 ◽  
pp. 96-104
Author(s):  
Rokshana Panna ◽  
FM Aminuzzaman ◽  
MR Islam ◽  
MHM Borhannuddin Bhuyan
Keyword(s):  
Seed Germination ◽  
Plant Extracts ◽  
Leaf Extract ◽  
Bipolaris Sorokiniana ◽  
Leaf Extracts ◽  
Pathology Laboratory ◽  
Black Cumin ◽  
Seed Pathology ◽  
Indigenous Plant ◽  
Black Cumin Seed

Studies were conducted in the Seed Pathology Laboratory, Department of Plant Pathology, Sher-e-Bangla Agricultural University to evaluate some indigenous plant extracts on the incidence of Bipolaris sorokiniana of wheat and seed germination. Seed treated with plant extracts reduced the incidence of Bipolaris sorokiniana. The lowest incidence was counted (12.33%) in seeds treated with Burmuda grass extracts (1:2W/V). While the highest seed germination (99.60%) was recorded in seeds treated with this grass extract followed by 99.33% germination in seeds treated with Neem leaf extract (1:2W/V), 98.00% with nut sedge grass rhizome extract (1:2 W/V), 87.67% with Allamanda leaf extract (1:2W/V). Comparatively the lowest incidence of Bipolaris sorokiniana (14.00%) was observed in seeds treated with Neem leaf extracts (1:2W/V) followed by 14.50% in seeds treated with Nut sedge grass rhizome extracts (1:2W/V), Black cumin seed extracts (15.20%) and Allamanda leaf extract (24.00%).

Oviposition-deterrent, ovicidal, and repellent activities of indigenous plant extracts against Anopheles subpictus Grassi (Diptera: Culicidae)

2009 ◽  
Vol 105 (6) ◽  
pp. 1567-1576 ◽  
Author(s):  
G. Elango ◽  
A. Bagavan ◽  
C. Kamaraj ◽  
A. Abduz Zahir ◽  
A. Abdul Rahuman
Keyword(s):  
Plant Extracts ◽  
Oviposition Deterrent ◽  
Anopheles Subpictus ◽  
Indigenous Plant

Evaluation of indigenous plant extracts against larvae of Culex quinquefasciatus Say (Diptera: Culicidae)

2008 ◽  
Vol 104 (3) ◽  
pp. 637-643 ◽  
Author(s):  
A. Abdul Rahuman ◽  
A. Bagavan ◽  
C. Kamaraj ◽  
M. Vadivelu ◽  
A. Abduz Zahir ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Culex Quinquefasciatus ◽  
Indigenous Plant

scholarly journals ADULTICIDAL ACTIVITY OF BOTANICAL OILS BY IMPREGNATED PAPER ASSAY AGAINST CULEX QUINQUEFASCIATUS SAY

2017 ◽  
Vol 9 (5) ◽  
pp. 156
Author(s):  
M. Ramar ◽  
S. Ignacimuthu ◽  
P. Manonmani ◽  
K. Murugan
Keyword(s):  
Essential Oils ◽  
Culex Quinquefasciatus ◽  
Mosquito Control ◽  
Exposure Period ◽  
Adult Mortality ◽  
Clove Oil ◽  
Chemical Insecticide ◽  
Plant Essential Oils ◽  
Knock Down ◽  
Indigenous Plant

Objective: The present study was undertaken with the aim of finding out the efficacy of essential oils (EOs) as anti-mosquito agents for commercial purposes. Plant source insecticides as an alternative to chemical insecticide, this study were evaluated to assess the knock-down and adulticidal prospective of the essential oils against Culex quinquefasciatus. The plant essential oil is largely cultivated throughout India and in all Tropical countries.Methods: The selected botanical essential oils were procured from commercial producers of plant essential oils and aromatic substances were used in this study. Knock-down and Adulticidal bioassay was performed according to WHO protocol. A single dose of the essential oils was used in the preliminary screening. 20 adult mosquitoes (3-5 d old glucose fed mosquitoes) were exposed on treated paper for one hour and knocked down and live mosquitoes were counted at 5 minute intervals.Results: Among the twenty three oils tested, 100% knock-down and adult mortality was recorded at 10%/cm2dose of calamus, camphor, cinnamon, citronella, clove, eucalyptus, lemongrass, pine, thyme and tulsi oils respectively. At 10 % concentration, clove oil (KT50 =1.8 and KT90 = 2.03 min) was found to be the most potential treatment. After 15 min exposure period clove oil registered the lowest knock-down dosewhich was calculated as (KD50 =1.8 %/cm2and KD90 =11.2 %/cm2). The lower and upper 95 % confidence limits for clove oil were calculated as 0.2 and 4.2 min respectively.Conclusion: From the results it can be concluded that the adult of the Cx. quinquefasciatus were susceptible to the essential oils. Such findings would be useful in promoting research aiming at the development of new agent for mosquito control on basis of chemical compounds from indigenous plant sources as an alternative to chemicals.

scholarly journals Delivery Methods for RNAi in Mosquito Larvae

2020 ◽  
Vol 20 (4) ◽  
Author(s):  
Kashif Munawar ◽  
Azzam M Alahmed ◽  
Sayed M S Khalil
Keyword(s):  
Mosquito Control ◽  
Mosquito Species ◽  
Main Tool ◽  
Field Application ◽  
World Population ◽  
Mosquito Larvae ◽  
Health Issues ◽  
Delivery Methods ◽  
Resistance Development ◽  
The World

Abstract Mosquito-transmitted diseases pose a threat for a great portion of the world population. Chemical insecticides are the main tool for mosquito control. Heavy dependence on chemicals created several problems such as resistance development in many mosquito species, environmental effects, and human health issues. Other tools for mosquito control were developed and used in some parts of the world. Ribonucleic acid interference (RNAi) is a reverse genetic mechanism that was recently introduced as a new tool for pest control. Regarding mosquito, RNAi was used to study gene function and to discover genes that can be used as targets for control purposes. Several delivery methods are used to induce RNAi in mosquito larvae. Some methods such as injection and soaking are used routinely in RNAi research but have no application in the field. Other methods such as nanoparticles and microbes have some characteristics that make them good candidates for field application. In this report, we will focus on delivery methods for RNAi in mosquito larvae and will give examples for each method.

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