scholarly journals Climate Change May Restrict the Predation Efficiency of Mesocyclops aspericornis (Copepoda: Cyclopidae) on Aedes aegypti (Diptera: Culicidae) Larvae

Insects ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 307
Author(s):  
Nobuko Tuno ◽  
Tran Vu Phong ◽  
Masahiro Takagi
Keyword(s):  
Aedes Aegypti ◽  
Control Program ◽  
Viral Disease ◽  
Pupal Weight ◽  
Mosquito Larvae ◽  
Aquatic Life ◽  
Copepod Predation ◽  
Predation Efficiency ◽  
Different Temperatures ◽  
Mesocyclops Aspericornis

(1) Dengue is the most spread mosquito-borne viral disease in the world, and vector control is the only available means to suppress its prevalence, since no effective treatment or vaccine has been developed. A biological control program using copepods that feed on mosquito larvae has been practiced in Vietnam and some other countries, but the application of copepods was not always successful. (2) To understand why the utility of copepods varies, we evaluated the predation efficiency of a copepod species (Mesocyclops aspericornis) on a vector species (Aedes aegypti) by laboratory experiments under different temperatures, nutrition and prey-density conditions. (3) We found that copepod predation reduced intraspecific competition among Aedes larvae and then shortened the survivor’s aquatic life and increased their pupal weight. In addition, the predatory efficiency of copepods was reduced at high temperatures. Furthermore, performance of copepod offspring fell when the density of mosquito larvae was high, probably because mosquito larvae had adverse effects on copepod growth through competition for food resources. (4) These results suggest that the increase in mosquitoes will not be suppressed solely by the application of copepods if the density of mosquito larvae is high or ambient temperature is high. We need to consider additional control methods in order to maintain the efficiency of copepods to suppress mosquito increase.

scholarly journals The effect of some insecticides on the larvae of Aedes aegypti in Jeddah Governorate, Makah Province, Kingdom Saudi Arabia

2021 ◽  
Vol 3 (2) ◽  
pp. 043-048
Author(s):  
Mohi Eldin Abdallah M Mohammed ◽  
Omar Yousof M Ali ◽  
Ashraf Abd El-Salam H Mangoud ◽  
Mutaman Ali A Kehail
Keyword(s):  
Saudi Arabia ◽  
Aedes Aegypti ◽  
Vector Control ◽  
Control Program ◽  
Mosquito Larvae ◽  
Concentration Data ◽  
Breeding Sites ◽  
Vector Control Program ◽  
Pirimiphos Methyl ◽  
Lc50 And Lc90

Mosquitoes can act as vectors for many disease-causing viruses and parasites through carrying these organisms from person to person. The objective of this study was to evaluate the susceptibility of Aedes aegypti larvae to some insecticides in Jeddah Governorate. Mosquito larvae were collected from all the available breeding sites in Jeddah municipalities using standard larval collection kits. The diagnostic doses (LC50 and LC90) were calculated from the mortality and concentration data. The larvicides Pirimiphos methyl, Fenitrothion, Bifenthrin and Cypermethrin were tested against the larvae of Ae. aegypti mosquito. The results showed positive correlation between the concentrations under investigation and mortality% of the treated larvae. Cypermethrin gave strong effect against Ae. aegypti larvae (LD50 0.0015 ml/L) followed by Pirimiphos methyl (LD50 0.0020 ml/L), Bifenthrin (LD50 0.039 ml/L), and at last rank Fenitrothion (0.041 ml/L). The same trend was obtained in LD90s. Ae. aegypti in Jeddah was susceptible to Bifenthrin, Cypermethrin, Pirimiphos methyl and Fenitrothion. Further studies should be run to conduct an intensive and appropriate vector control program in Jeddah Governorate.

scholarly journals Larvicidal Effectiveness of Azolla pinnata against Aedes aegypti (Diptera: Culicidae) with Its Effects on Larval Morphology and Visualization of Behavioural Response

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Nor Shaida Husna Zulkrnin ◽  
Nurul Nadiah Rozhan ◽  
Nur Amanina Zulkfili ◽  
Nik Raihan Nik Yusoff ◽  
Mohd Sukhairi Mat Rasat ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Mosquito Control ◽  
Larval Mortality ◽  
Control Program ◽  
Test Method ◽  
World Health ◽  
Azolla Pinnata ◽  
Agricultural Field ◽  
Aquatic Fern ◽  
Significant Difference

Dengue is vector-borne diseases with 390 million infections per year extending over 120 countries of the world. Aedes aegypti (L.) (Diptera: Culicidae) is a primary vector for dengue viral infections for humans. Current focus on application of natural product against mosquito vectors has been the main priority for research due to its eco-safety. The extensive use of chemical insecticides has led to severe health problems, environmental pollution, toxic hazards to human and nontarget species, and development of insecticide resistance on mosquitoes. Azolla pinnata is an aquatic fern and predominantly used as feed in poultry industry and as fertilizer in agricultural field for enhancing the fertility of rice paddy soil. The present study was conducted to explore the larvicidal efficacy of A. pinnata using fresh and powdered form against late third-stage larvae (6 days, 5 mm in larvae body length) of Ae. aegypti (L.) (Diptera: Culicidae). The larvicidal bioassays were performed using World Health Organization standard larval susceptibility test method for different concentration for powdered and fresh A. pinnata. Powdered A. pinnata concentration used during larvicidal bioassay ranges from 500ppm to 2000ppm; meanwhile, fresh A. pinnata ranges from 500ppm to 9,000,000 ppm. The highest mortality was at 1853 ppm for powdered A. pinnata compared with fresh A. pinnata at 2,521,535 ppm, while the LC50 for both powdered and fresh A. pinnata recorded at 1262 ppm and 1853 ppm, respectively. Finally, the analysis of variance (ANOVA) showed significant difference on Ae. aegypti larval mortality (F=30.439, df=1, p≤0.001) and concentration (F=20.002, df=1, p≤0.001) compared to powdered and fresh A. pinnata at 24-hour bioassay test. In conclusion, the powdered A. pinnata serves as a good larvicidal agent against Ae. aegypti (L.) (Diptera: Culicidae) and this study provided information on the lethal concentration that may have potential for a more eco-friendly Aedes mosquito control program.

scholarly journals Effects of two formulations based on Bacillus thuringiensis subsp. israelensis on Aedes aegypti mosquito larvae under laboratory conditions

2008 ◽  
Vol 23 (4) ◽  
pp. 251-258
Author(s):  
Milenka Peric ◽  
Mirjana Prijovic ◽  
Goran Andric
Keyword(s):  
Bacillus Thuringiensis ◽  
Aedes Aegypti ◽  
Aqueous Suspension ◽  
Pure Water ◽  
Clay Content ◽  
Experimental Period ◽  
Mosquito Larvae ◽  
Water Dispersible ◽  
Bacillus Thuringiensis Subsp ◽  
Zero Time

Toxicity and persistence of two formulations based on Bacillus thuringiensis subsp. israelensis applied to Aedes aegypti mosquito larvae were tested under laborabory conditions. The formulations were: a) water dispersible granules (product VectoBac WDG), and b) aqueous suspension (product VectoBac 12AS). The effects of both products on mosquito larvae were tested immediately after their dilution in pure water (zero time) and in 1-, 2-, 8- and 13-day old solutions. The two products were also tested in mixtures of water and clay at a rate of 0.5 g clay/150 ml water immediately after product dilution, and in one-day old solutions containing 0.1 and 0.05 g of clay in the same amount of water. The product VectoBac WDG was persistent and highly effective against Ae. aegypti larvae in pure water after the longest experimental period of 13 days, and significantly more effective than VectoBac 12AS at equal rates of application. The effectiveness of VectoBac 12AS weakened significantly after 8 and 13 days of treatment, compared to the effects at zero time and in 1- and 2-day old solutions. High clay content in water significantly reduced the larvicidal effectiveness of both products, indicating its possible compromising role during product application in practice.

scholarly journals Bioefficacy of some insect growth regulators and plant extracts against mosquito larvae of Aedes aegypti

2019 ◽  
Vol 6 (1) ◽  
pp. 001-006
Author(s):  
Mohamd R. Al-Zahrani ◽  
Jazem A. Mahyoub ◽  
Khalid M. Al-Ghamdi ◽  
Habeeb M. Al-Solami
Keyword(s):  
Aedes Aegypti ◽  
Growth Regulators ◽  
Plant Extracts ◽  
Mosquito Larvae ◽  
Insect Growth Regulators ◽  
Insect Growth

scholarly journals Tumbuhan Obat: Pendekatan Alternatif dalam Pengendalian Nyamuk Aedes aegypti dan Virus Dengue Penyebab Demam Dengue

2018 ◽  
Vol 4 (2) ◽  
pp. 83-90
Author(s):  
Ign Joko Suyono ◽  
Aditya K. Karim
Keyword(s):  
Medicinal Plant ◽  
Aedes Aegypti ◽  
Dengue Fever ◽  
Mosquito Control ◽  
Dengue Shock Syndrome ◽  
Viral Disease ◽  
Mosquito Vector ◽  
Major Health ◽  
Alternative Approach ◽  
Control And Prevention

Dengue is the most important emerging tropical viral disease of humans in the world today. Aedes aegypti is a major mosquito vector responsible for transmitting many viral diseases and this mosquito that spreads major health problems like dengue fever. The resistance of Ae. aegypti to insecticides is already widespread and represents a serious problem for programmes aimed at the control and prevention of dengue in tropical countries. The search for compounds extracted from medicinal plant preparations as alternatives insecticide for mosquito control is in immediate need. Alternative approach for control Ae. aegypti dan virus dengue using the medicinal plant will be discussed in this paper.Key words: Medicinal plant, Aedes aegypti, dengue fever, dengue haemorragi fever, dengue shock syndrome

scholarly journals The Toxicity of Srikaya Seed Granules (Annona squamosa L.) with Different Heating Temperatures Against the Larva of Aedes aegypti L.

BIOEDUKASI ◽  
2020 ◽  
pp. 1
Author(s):  
Rima Gloria Purwanto ◽  
Dwi Wahyuni ◽  
Joko Waluyo
Keyword(s):  
Aedes Aegypti ◽  
Mosquito Control ◽  
Heating Temperature ◽  
Probit Analysis ◽  
Mosquito Larvae ◽  
Annona Squamosa ◽  
Forest Region ◽  
Randomized Design ◽  
Significant Difference ◽  
Lower Temperature

Abstract: Aedes aegypti L. is a mosquito carrying dengue virus that causes dengue fever, especially in Southeast Asia which is a tropical rain forest region which is a habitat for mosquito growth. Aedes aegypti L. mosquito control is carried out by chemical means of fogging and using abate but this control actually causes Aedes aegypti L. mosquitoes to become resistant or immune to chemical drugs so that a new breakthrough is created by making bioinsecticides biologically to eradicate the Aedes aegypti L. mosquito. with characteristics that are environmentally friendly and do not kill non-target animals and cause the Aedes aegypti L. mosquito not to become resistant. To be able to realize this desire so that the sugar cane granules extract of Annona squamosa L. containing active compounds in the form of annonain and squamosin so that they are toxic to Aedes aegypti L. mosquito larvae. Further research is to test the heating temperature level of the granules of Annona squamosa L. extract temperature of 40 ° C and 60 ° C which is more deadly of Aedes aegypti L. mosquito larvae. This research method uses a completely randomized design with four repetitions. The temperature of 60 ° C uses concentrations of 1 ppm, 6 ppm, 12 ppm, 18 ppm, 24 ppm and 30 ppm. As for the temperature of 40 ° C using concentrations of 1 ppm, 7 ppm, 14 ppm, 21 ppm, 28 ppm, and 35 ppm, each temperature compared with aquadest and abate. Data analyzed using probit analysis to determine the LC50, then followed by a statistical test paired sample T-test with SPSS to find out a significant difference between heating temperatures of 40 ° C to 60 ° C. These results then show that a higher temperature of 60 ° C has a higher level of toxicity compared to a lower temperature of 40 ° C.

scholarly journals Glyphosate impairs learning in Aedes aegypti mosquito larvae at field-realistic doses

2018 ◽  
Vol 221 (20) ◽  
pp. jeb187518 ◽  
Author(s):  
Hugo Baglan ◽  
Claudio R. Lazzari ◽  
Fernando J. Guerrieri
Keyword(s):  
Aedes Aegypti ◽  
Mosquito Larvae

scholarly journals ANALISIS PELAKSANAAN PROGRAM PENGENDALIAN DEMAM BERDARAH DENGUE (DBD) DI PUSKESMAS KARYA WANITA KOTA PEKANBARU

2021 ◽  
Vol 1 (2) ◽  
pp. 443-456
Author(s):  
Qory Ayunitami ◽  
Herlina Susmaneli ◽  
Christine Vita Gloria Purba
Keyword(s):  
Public Health ◽  
Aedes Aegypti ◽  
Health Center ◽  
Age Groups ◽  
Control Process ◽  
Control Program ◽  
Hemorrhagic Fever ◽  
Public Health Center ◽  
Dengue Disease ◽  
The Government

Demam Berdarah Dengue (DBD) merupakan salah satu jenis penyakit menular yang disebabkan oleh virus dengue yang ditularkan melalui gigitan nyamuk Aedes Aegypti. Penyakit DBD dapat muncul sepanjang tahun dan dapat menyerang seluruh kelompok umur. Puskesmas Karya Wanita merupakan daerah yang endemis yaitu daerah yang mudah terjangkit penyakit dalam jumlah besar salah satunya penyakit DBD. Upaya dari pemerintah untuk mengatasi penularan penyakit DBD dengan melakukan program pengendalian DBD. Program pengendalian ini berupa pemberantasan sarang nyamuk, penyelidikan epidemiologi dan penggulangan fokus. Kegiatan ini mempunyai tujuan utama diantaranya untuk menurunkan angka kesakitan, menurunkan angka kematian, dan mencegah terjadinya KLB penyakit DBD. Tujuan penelitian ini untuk menganalisis pelaksanaan program pengendalian DBD di Puskesmas Karya Wanita Kota Pekanbaru tahun 2020. Penelitian ini merupakan penelitian kualitatif deskriptif dengan pendekatan studi kasus. Subjek penelitian ini terdiri dari 1 informan kunci yaitu Kepala Puskesmas, 2 informan utama yaitu Pemegang Program DBD, Petugas Promosi Kesehatan, dan 2 informan pendukung yaitu Kader dan Masyarakat. Teknik yang digunakan dalam penelitian ini adalah wawancara mendalam dengan menggunakan bantuan pedoman wawancara serta analisis data dilakukan secara deskriptif dan disajikan dalam bentuk narasi . Hasil penelitian ini menunjukkan bahwa pelaksanaan program pengendalian DBD belum optimal, hal ini disebabkan oleh kurangnya dana untuk melaksanakan program ini, dan juga masih kurangnya partisipasi masyarakat dalam melakukan program Pemberantasan Sarang Nyamuk (PSN). Diharapkan kepada pihak puskesmas agar dapat bekerjasama dengan pihak terkait seperti Dinas Kesehatan Kota/Provinsi dan lintas sektor dalam pendanaan untuk semua kegiatan pengendalian DBD dan lebih memotivasi masyarakat agar ikut serta dalam proses pengendalian DBD. Dengue Hemorrhagic Fever (DHF) is a type of infectious disease caused by the dengue virus which is transmitted through the bite of the Aedes Aegypti mosquito. DHF can appear throughout the year and can affect all age groups. Karya Wanita Public Health Center is an endemic area, namely an area that is easily infected by large numbers of diseases, one of which is DHF. Efforts from the government to overcome the transmission of dengue disease by implementing a dengue control program. This control program takes the form of eradicating mosquito nests, epidemiological investigations and focus repetition. This activity has the main objective of reducing morbidity, reducing mortality, and preventing outbreaks of dengue fever. The purpose of this study was to analyze the implementation of the DHF control program at  Karya Wanita Public health center Pekanbaru City in 2020. This research is a descriptive qualitative research with a case study approach. The subjects of this study consisted of 1 key informant, namely the Head of the Puskesmas, 2 main informants, namely the DBD Program Holder, a Health Promotion Officer, and 2 supporting informants namely Cadres and the Community. The technique used in this research is in-depth interviews using interview guides and data analysis is done descriptively and presented in narrative form. The results of this study indicate that the implementation of the DHF control program is not optimal, this is due to the lack of funds to implement this program, and also the lack of community participation in carrying out the Mosquito Nest Eradication (PSN) program. It is hoped that the public health center will be able to collaborate with related parties such as the City / Provincial Health Office in funding for all DHF control activities and to further motivate the community to participate in the DHF control process

scholarly journals A comparison of aquaporin expression in mosquito larvae (Aedes aegypti) that develop in hypo-osmotic freshwater and iso-osmotic brackish water

PLoS ONE ◽  
2020 ◽  
Vol 15 (8) ◽  
pp. e0234892
Author(s):  
Lidiya Misyura ◽  
Elia Grieco Guardian ◽  
Andrea Claire Durant ◽  
Andrew Donini
Keyword(s):  
Aedes Aegypti ◽  
Brackish Water ◽  
Mosquito Larvae

The Global Expansion of Dengue: How Aedes aegypti Mosquitoes Enabled the First Pandemic Arbovirus

2020 ◽  
Vol 65 (1) ◽  
pp. 191-208 ◽  
Author(s):  
Oliver J. Brady ◽  
Simon I. Hay
Keyword(s):  
Invasive Species ◽  
Aedes Aegypti ◽  
Infectious Diseases ◽  
Control Strategies ◽  
Viral Disease ◽  
Rapid Rise ◽  
Disease Vector ◽  
Research Priority ◽  
Global Spread ◽  
Human Habitation

Dengue is an emerging viral disease principally transmitted by the Aedes ( Stegomyia) aegypti mosquito. It is one of the fastest-growing global infectious diseases, with 100–400 million new infections a year, and is now entrenched in a growing number of tropical megacities. Behind this rapid rise is the simple adaptation of Ae. aegypti to a new entomological niche carved out by human habitation. This review describes the expansion of dengue and explores how key changes in the ecology of Ae. aegypti allowed it to become a successful invasive species and highly efficient disease vector. We argue that characterizing geographic heterogeneity in mosquito bionomics will be a key research priority that will enable us to better understand future dengue risk and design control strategies to reverse its global spread.

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