| laboratory and field evaluation of teknar hp-d, a biolarvicidal formulation of bacillus thuringiensis ssp. israelensis, against mosquito vectors. | larvicidal efficacy of teknar hp-d, an improved biolarvicidal formulation of bacillus thuringiensis ssp. israelensis (bti), against anopheles stephensi, culex quinquefasciatus and aedes aegypti was determined in the laboratory, and in field the efficacy of the formulation was tested against cx. quinquefasciatus breeding in cesspits, unused wells and drains. the toxicity of the formulation to gambusia affinis (larvivorous fish), notonecta sp. and diplonychus indicus (water bugs) was also evaluate ... | 2004 | 15350862 |
| population interactions between culex vishnui mosquitoes and their natural enemies in pondicherry, india. | population interactions among mosquitoes in the culex vishnui subgroup, which are vectors of japanese encephalitis, and their natural enemies were studied in pondicherry, india. we tested the hypothesis that the breakdown of interactions between the larvae and their natural enemies due to drought followed by rain was responsible for the sudden increase in the vector population above the threshold for disease transmission during the heavy rainy period. we randomly sampled mosquito larvae and thei ... | 2006 | 16859094 |
| a novel herbal formulation against dengue vector mosquitoes aedes aegypti and aedes albopictus. | the objective of this study was to develop a herbal formulation to control dengue vector mosquitoes. ponneem, a novel herbal formulation prepared using the oils of neem (azadirachta indica), karanj (pongamia glabra) and their extracts, was tested for larvicidal, ovicidal and oviposition deterrent activities against aedes aegypti and aedes albopictus at 1, 0.5, 0.3 and 0.1 ppm concentrations. cent percent larvicidal and ovicidal activities were observed at 0.1 ppm in the two mosquito species unde ... | 2011 | 22042505 |
| larvicidal properties of water bug diplonychus indicus venkatesan & rao and its use in mosquito control. | males, females and egg carrying males of water bug d. indicus were collected at different sites from chetpet pond, madras, india. the bugs showed differences in their predatory efficiencies in relation to density, size and type of prey. the bug showed a typical predatory response in relation to hunger level. | 2009 | 2807408 |
| one-pot biogenic fabrication of silver nanocrystals using quisqualis indica: effectiveness on malaria and zika virus mosquito vectors, and impact on non-target aquatic organisms. | currently, mosquito vector control is facing a number of key challenges, including the rapid development of resistance to synthetic pesticides and the recent spread of aggressive arbovirus outbreaks. the biosynthesis of silver nanoparticles (agnps) is currently considered an environmental friendly alternative to the employ of pyrethroids, carbamates and microbial agents (e.g. bacillus thuringiensis var. israelensis), since agnps are easy to produce, effective and stable in the aquatic environmen ... | 2016 | 27491031 |
| towards green oviposition deterrents? effectiveness of syzygium lanceolatum (myrtaceae) essential oil against six mosquito vectors and impact on four aquatic biological control agents. | essential oils (eos) from plants may be alternative sources of molecules toxic against mosquito vectors of public health relevance. most of researches in this field focused on eos as larvicides or ovicides, while limited efforts focused on the exploitation of eos as oviposition deterrents. in the present study, the larvicidal and oviposition deterrent activity of syzygium lanceolatum leaf eo was evaluated against six mosquito species, anopheles stephensi, an. subpictus, aedes aegypti, ae. albopi ... | 2016 | 27921244 |
| facile fabrication of eco-friendly nano-mosquitocides: biophysical characterization and effectiveness on neglected tropical mosquito vectors. | mosquito (diptera: culicidae) vectors are solely responsible for transmitting important diseases such as malaria, dengue, chikungunya, japanese encephalitis, lymphatic filariasis and zika virus. eco-friendly control tools of culicidae vectors are a priority. in this study, we proposed a facile fabrication process of poly-disperse and stable silver nanoparticles (ag nps) using a cheap leaf extract of ichnocarpus frutescens (apocyanaceae). bio-reduced ag nps were characterized by uv-vis spectropho ... | 2016 | 27866611 |
| single-step biological fabrication of colloidal silver nanoparticles using hugonia mystax: larvicidal potential against zika virus, dengue, and malaria vector mosquitoes. | mosquito control is facing key challenges, including outbreaks of new arbovirus threats. we proposed an eco-friendly synthesis of silver nanoparticles (agnps) employing a low-cost extract of hugonia mystax. agnps were specified by uv, xrd, ftir and edx spectroscopy, sem and tem. agnps were more toxic to anopheles stephensi, aedes aegypti, and culex quinquefasciatus larvae (lc50: 14.45, 15.86, and 17.46 μg/ml) if compared to aquatic biocontrol organisms gambusia affinis, diplonychus indicus, and ... | 2016 | 27611658 |
| acute toxicity and repellent activity of the origanum scabrum boiss. & heldr. (lamiaceae) essential oil against four mosquito vectors of public health importance and its biosafety on non-target aquatic organisms. | the recent outbreaks of dengue, chikungunya, and zika virus highlighted the pivotal importance of mosquito vector control in tropical and subtropical areas worldwide. however, mosquito control is facing hot challenges, mainly due to the rapid development of pesticide resistance in culicidae and the limited success of biocontrol programs on aedes mosquitoes. in this framework, screening botanicals for their mosquitocidal potential may offer effective and eco-friendly tools in the fight against mo ... | 2016 | 27604128 |
| eco-friendly larvicides from indian plants: effectiveness of lavandulyl acetate and bicyclogermacrene on malaria, dengue and japanese encephalitis mosquito vectors. | mosquitoes (diptera: culicidae) are a key threat for millions of people and animals worldwide, since they act as vectors for devastating pathogens and parasites, including malaria, dengue, japanese encephalitis, filiariasis and zika virus. mosquito young instars are usually targeted using organophosphates, insect growth regulators and microbial agents. indoor residual spraying and insecticide-treated bed nets are also employed. however, these chemicals have negative effects on human health and t ... | 2016 | 27504617 |
| one-pot fabrication of silver nanocrystals using nicandra physalodes: a novel route for mosquito vector control with moderate toxicity on non-target water bugs. | mosquitoes (diptera: culicidae) as vectors for important diseases and parasites causing millions of deaths every year. the use of synthetic pesticides against culicidae leads to resistance and environmental concerns. therefore, eco-friendly control tools are a priority. in this research, nicandra physalodes-mediated synthesis of silver nanoparticles (ag nps) was conducted, in order to control larval populations of three important mosquito vectors, anopheles stephensi, aedes aegypti and culex qui ... | 2016 | 27473981 |
| one-step synthesis of polydispersed silver nanocrystals using malva sylvestris: an eco-friendly mosquito larvicide with negligible impact on non-target aquatic organisms. | the synthesis of eco-friendly nanoparticles is evergreen branch of nanoscience with a growing number of biomedical implications. in this study, we investigated the synthesis of polydisperse and stable silver nanoparticles (agnp) using a cheap leaf extract of malva sylvestris (malvaceae). bio-reduced agnp were characterized by uv-visible spectrophotometry, fourier transform infrared spectroscopy (ftir), x-ray diffraction analysis (xrd), atomic force microscopy (afm), scanning electron microscopy ... | 2016 | 27075309 |
| chemical composition, toxicity and non-target effects of pinus kesiya essential oil: an eco-friendly and novel larvicide against malaria, dengue and lymphatic filariasis mosquito vectors. | mosquitoes (diptera: culicidae) are vectors of important parasites and pathogens causing death, poverty and social disability worldwide, with special reference to tropical and subtropical countries. the overuse of synthetic insecticides to control mosquito vectors lead to resistance, adverse environmental effects and high operational costs. therefore, the development of eco-friendly control tools is an important public health challenge. in this study, the mosquito larvicidal activity of pinus ke ... | 2016 | 26995063 |
| larvicidal and repellent potential of zingiber nimmonii (j. graham) dalzell (zingiberaceae) essential oil: an eco-friendly tool against malaria, dengue, and lymphatic filariasis mosquito vectors? | mosquitoes (diptera: culicidae) are important vectors of terms of public health relevance, especially in tropical and sub-tropical regions. the continuous and indiscriminate use of conventional pesticides for the control of mosquito vectors has resulted in the development of resistance and negative impacts on non-target organisms and the environment. therefore, there is a need for development of effective mosquito control tools. in this study, the larvicidal and repellent activity of zingiber ni ... | 2016 | 26792432 |
| laboratory evaluation of methanolic extract of atlantia monophylla (family: rutaceae) against immature stages of mosquitoes and non-target organisms. | methanolic extracts of the leaves of atlantia monophylla (rutaceae) were evaluated for mosquitocidal activity against immature stages of three mosquito species, culex quinquefasciatus, anopheles stephensi, and aedes aegypti in the laboratory. larvae of cx. quinquefasciatus and pupae of an. stephensi were found more susceptible, with lc50 values of 0.14 mg/l and 0.05 mg/l, respectively. insect growth regulating activity of this extract was more pronounced against ae. aegypti, with ei50 value 0.00 ... | 2004 | 15057359 |
| facile synthesis of mosquitocidal silver nanoparticles using mussaenda glabra leaf extract: characterisation and impact on non-target aquatic organisms. | plant-borne compounds have been proposed for extracellular synthesis of mosquitocidal nanoparticles. however, their impact against mosquito natural enemies has been scarcely studied. here, we synthesised silver nanoparticles (ag nps) using mussaenda glabra leaf extract as reducing and stabilising agent. biofabricated ag nps were characterised by uv-vis spectrophotometry, x-ray diffraction, fourier transform infrared (ftir) spectroscopy, scanning electron microscopy (sem) and transmission electro ... | 2016 | 27209898 |
| facile biosynthesis of silver nanoparticles using barleria cristata: mosquitocidal potential and biotoxicity on three non-target aquatic organisms. | mosquitoes (diptera: culicidae) act as vectors of important pathogens and parasites, such as malaria, dengue, chikungunya, japanese encephalitis and lymphatic filariasis. the use of synthetic mosquitocides often leads to high operational costs and adverse non-target effects. recently, plant-borne compounds have been proposed for rapid extracellular biosynthesis of mosquitocidal nanoparticles. however, the impact of these nanomosquitocides against biological control agents of mosquito larval popu ... | 2016 | 26555876 |
| aristolochia indica green-synthesized silver nanoparticles: a sustainable control tool against the malaria vector anopheles stephensi? | malaria is a life-threatening disease caused by parasites transmitted to people and animals through the bites of infected mosquitoes. we biosynthesized silver nanoparticles (agnp) using aristolochia indica extract as reducing and stabilizing agent. agnp were characterized by uv-vis spectroscopy, ftir, sem, edx and xrd. in laboratory, lc50 of a. indica extract against anopheles stephensi ranged from 262.66 (larvae i) to 565.02 ppm (pupae). lc50 of agnp against a. stephensi ranged from 3.94 (larva ... | 2015 | 26412532 |
| a novel biopesticide ponneem to control human vector mosquitoes anopheles stephensi l. and culex quinquefasciatus say. | organophosphate pesticides are widely used in vector mosquito management and agricultural pest management. these chemicals enter into natural water bodies and soil and cause hazards to the environment. the objective of this study was to prepare a natural pesticide which will not harm the environment and yet control vector mosquitoes. ponneem, a novel biopesticide, patented and prepared from the oils of azadirachta indica and pongamia glabra, was tested against anopheles stephensi and culex quinq ... | 2015 | 25929457 |
| effect of nutritional status and sex on the circadian variation in predation and haemolymph free sugars of diplonychus indicus n. sp. (heteroptera: belostomatidae). | total free sugars in the haemolymph of an aquatic hemipteran, diplonychus indicus n. sp. were analyzed at different times of day under differential nutritional conditions. feeding was observed to mask the time of day variation in the haemolymph free sugars. predatory periodicity during the day differs between sexes, suggesting the tendency of these insects to avoid intra-specific competition for food. | 2003 | 7438891 |
| eco-friendly and cost-effective ag nanocrystals fabricated using the leaf extract of habenaria plantaginea: toxicity on six mosquito vectors and four non-target species. | recently, the biofabrication of metal nanoparticles has gained wide interest owing to its inherent features such as swift, simplicity, eco-friendliness, and cheaper costs. different green-reducing agents led to the production of nanoparticles with varying toxicity on insects. in the current study, silver nanoparticles (agnps) were successfully synthesized using habenaria plantaginea leaf extract. ag nanoparticles were studied by uv-vis spectroscopy (uv-vis), x-ray diffraction (xrd), fourier tran ... | 2017 | 28523613 |
| predatory versatility in the water bug diplonychus indicus. | first instar diplonychus indicus venk. et rao (heteroptera:belostomatidae) larvae possess a behavioural plasticity similar to that of adults. this highly versatile predator alternates frequently from foraging actively to ambushing and vice versa. no significant variations in the use of these two predatory modes during post-embryonic development could be evidenced. the present study stresses similarities between the use of different predatory modes by young and old larvae and by adults. changes p ... | 1991 | 24923518 |
| modelling prey-predator cycles using hemipteran predators of mosquito larvae for reducing world-wide mosquito-borne disease incidence. | diplonychus indicus is an aquatic hemipterous bug known to be a voracious predator of dipteran larvae, among others, and to show a selective predation for mosquito larvae when exposed to a mixed prey diet. a datum consisted of the percentage of the fourth instar of (25) culicine mosquitoes killed by the bug. data around the clock, published earlier (from starved adult males of this bug), reanalyzed by single cosinor, reveal a circasemidian rhythm (p = 0.004). this result prompts the recommendati ... | 2008 | 2880698 |
| estimation of mosquito predation by the water bug diplonychus indicus venkatesan & rao. | | 1985 | 4077118 |