نتایج جستجو برای: culex larvae
تعداد نتایج: 36331 فیلتر نتایج به سال:
BVA 2 mosquito larvicide was evaluated in laboratory pan tests against 3rd-instar Aedes taeniorhynchus (Wied.), Culex quinquefasciatus Say, and Culex nigripalpus Theobald larvae. BVA 2 was as effective as the standard, GB-1111, at 14 liters/ha (> 99.1% vs. 99.8%). In small field plot tests BVA 2 mosquito larvicide applied at 28 liters/ha was as effective as GB-1111 (99.0% vs. 99.8%) 24 h posttr...
The plant Artemisia vulgaris is a perennial weed, belongs to the family Asteraceae, and locally known as Tarkha in Dir and Swat regions of Khyber Pakhtunkhwa (K.P.K), Pakistan. The present study aimed to evaluate the larvicidal activity of methanol extracts of roots, stem and leaves of Artemisia vulgaris against Culex quinquefasciatus. The 3 and 4 instars larvae of Culex quinquefasciatus were e...
In this study, we synthesized and characterized (UV–vis, XRD, FTIR, SEM, TEM, AFM) Trewia nudiflora-assisted silver nanoparticles (Tn-AgNPs). The toxicity of T. nudiflora leaf aqueous extract Tn-AgNPs was tested against Anopheles stephensi, Aedes aegypti, Culex quinquefasciatus larvae its LC50 values were 121.82/16.69, 130.51/18.11, 142.38/19.53 μg mL–1, respectively. Moreover, the biotoxicity ...
BACKGROUND AND OBJECTIVES Predation potential of the dytiscid beetle, Rhantus sikkimensis Regimbart 1899 and the larvae of Toxorhynchites splendens Wiedemann 1819 occurring along with the larval stages of the mosquitoes in the annual lentic water bodies of Darjeeling was evaluated using the larvae of Culex quinquefasciatus Say 1823 as preys, in the laboratory under simulated natural conditions....
Mosquitoes go through four development phases: egg, larva, pupa and adult. The growth, survival, adaptation of mosquito larvae are strongly influenced by the physical chemical characteristics waters. Nature tourism parks have ecological environmental potential for spread mosquitoes vector diseases. This study aims to look at correlation elements water number larvae. design was cross-sectional a...
Background & Objective: Epidemic of dangerous diseases caused by Culex pipiens’ bites prompted us to focus on these groups of insects. Today, the most successful biological insecticides are produced by the bacteria of the genus Bacillus, which in the production phase of spores, makes crystalline endotoxin protein. This protein can be activated upon entering the insect’s intestine in alkali...
The efficacy of maximum label rates of bifenthrin applications to dry tires to prevent Aedes mosquito breeding was investigated by field colonization and bioassay trials in shaded and unshaded locations. Aedes notoscriptus and Culex quinquefasciatus larvae were the most abundant species present in the field colonization trial. Colonization and survival of Ae. notoscriptus larvae to the late ins...
Cry11A from Bacillus thuringiensis subsp. israelensis and Cry11Ba from Bacillus thuringiensis subsp. jegathesan were introduced, separately and in combination, into the chromosome of Bacillus sphaericus 2297 by in vivo recombination. Two loci on the B. sphaericus chromosome were chosen as target sites for recombination: the binary toxin locus and the gene encoding the 36-kDa protease that may b...
A prospective entomological survey was conducted in four sentinel villages in central Nigeria from 1999-2002, to assess the impact of annual, single-dose, mass drug administrations (MDA), with a combination of ivermectin and albendazole, on the transmission of Wuchereria bancrofti. As they were also endemic for human onchocerciasis, the four villages had received annual MDA based on ivermectin ...
Interaction of aquatic stages of coexisting mosquito species may have significant influence on resulting adult mosquito populations. We used two coexisting species, Anopheles gambiae s.s. and Culex quinquefasciatus to investigate whether third instars of one species consumed first instars of the other. First instars of one species were readily consumed by a third instar of the other species irr...
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