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[seasonal changes in the gonoactivity of culex pipiens pipiens in northern germany and its response to day length and temperature (author's transl)]. 19744424232
biochemistry of mosquito infection: preliminary studies of biochemical change in culex pipiens quinquefasciatus following infection with lagenidium giganteum. 19744443605
variation in life table characteristics among three geographic strains of culex pipiens quinquefasciatus. 19744455916
translocations, inversions and correlation of linkage groups to chromosomes in the mosquito culex pipiens fatigans. 19744458941
an observation on the study of resistance of culex pipiens fatigans (wied) collected from calcutta against ddt. 19744468274
trehalase of culex pipiens fatigans. 19744469246
the effect of larval density on the fertility of female culex pipiens molestus forsk., (diptera, culicidae). 19734518546
[genetic battle against culex pipiens in the montpellier area. 2nd year of observations]. 19724521088
hybrid compatibilities and susceptibility of culex pipiens fatigans wied. to wuchereria bancrofti (cobbold) in east africa.tests with colonies of culex pipiens fatigans from six localities in kenya and tanzania revealed high levels (60-90%) of susceptibility to infection with wuchereria bancrofti. twenty-six of 30 possible crosses between these colonies were performed and revealed no cases of incompatibility. all but 2 crosses produced near-normal sex ratios of f(1) adults, with a slight excess of females in 16 of 20 detailed assessments. the implications of these results for control work and filariasis transmission ...19724538541
experimental introduction of a microsporidian into a wild population of culex pipiens fatigans wied.chemical control of c. p. fatigans frequently fails because the mosquito rapidly develops resistance to insecticides. a possible alternative or complementary method is biological control, including the introduction of pathogens. the microsporidian plistophora culicis was known to infect readily and have an adverse effect on c. p. fatigans populations in the laboratory, so an attempt was made to introduce and establish this pathogen in a wild population of the mosquito on the pacific island of na ...19724538542
chemosterilization of culex pipiens fatigans wiedemann by exposure of aquatic stages. 3. induction of dominant lethal mutations in the f 1 generation by certain aziridines, phosphoramides, and s-triazines.in insects it is known that the chemosterilant treatment induces dominant lethal mutations which bring about embryonic death. the possibility of delayed expression of the chemosterilant-induced dominant lethals in f(1) progeny of the tropical house mosquito, culex pipiens fatigans wiedemann has been investigated. the chemosterilants employed were 8 aziridinyl compounds, 3 phosphoramides, and 4 s-triazines. in general, all the chemosterilants tested were found to cause different degrees of mortal ...19724539817
influence of seasonal changes in climate on dispersal of released culex pipiens fatigans: a study in villages in delhi union territory, india.studies on culex pipiens fatigans dispersal were conducted during the hot, cold, rainy, and post-rainy seasons in 2 villages in the delhi area in order to improve techniques and to determine the optimum time of release. releases from one central point and from a number of points were evaluated. no directional effect on dispersal was observed. dispersal was most rapid and extensive in the hot season and slowest and most limited during the cold season, when the released mosquitos tended to remain ...19734542799
sequential application of ultra-low-volume ground aerosols of fenitrothion for sustained control of aedes aegypti.a trial was carried out of the efficacy of fenitrothion ultra-low-volume aerosol applied by vehicle-mounted cold aerosol generator for the control of aedes aegypti. five applications of fenitrothion at intervals of 11-49 days at dosages of 511-1 095 ml/ha gave sustained control for 4-5 months in an area of some 14 ha containing 1 300 houses. immediate killing of adult mosquitos and some larvicidal effect interrupted oviposition and retarded the recovery of the mosquito population. sequential tre ...19734543550
dispersal and survival in the field of chemosterilized, irradiated, and cytoplasmically incompatible male culex pipiens fatigans.comparative field studies were made on the dispersal and survival of chemosterilized, irradiated, and cytoplasmically incompatible (d3 strain) male culex pipiens fatigans. there was no significant difference in dispersal patterns and daily survival rates between laboratory colony males and wild males, and between chemosterilized or irradiated males and untreated males. although there was no difference in dispersal between adults of the d3 strain and the laboratory colony of the delhi strain, the ...19734544151
population replacement in culex fatigens by means of cytoplasmic incompatibility. laboratory experiments with non-overlapping generations.bidirectional cytoplasmic incompatibility in the culex pipiens complex appears to provide a mechanism for the replacement of a wild population by a strain refractory to filaria or a strain made partly sterile by a translocation. as a preliminary test of the feasibility of the replacement process, various ratios of strains with the cytoplasm of either delhi or paris, which are bidirectionally incompatible, were tested in laboratory cages. where one strain was marked with the ruby-eye gene, this s ...19744549348
? sp. trypanosomes in the semi-digested blood meal of a female culex pipiens collected in an outhouse in late august 1971. comparisons between oöcysts of p. vivax and p. berghei as seen in sections of anopheles stephensi. 19724558680
[cytoplasmatic polyhedrosis virus of mosquito culex pipiens pipiens l]. 19734592944
entomological aspects of filariasis control in sri lanka.historical events and suitable environmental conditions in the southwestern coastal areas of sri lanka have led to the establishment of a zone of endemic filariasis caused by wuchereria bancrofti and transmitted by culex pipiens fatigans. the previous brugia malayi foci, scattered over widely dispersed areas of the island, were apparently completely eliminated as a result of control of the mansonia vectors by the destruction of the larval host plants in their swamp habitats. control measures by ...19744619057
[function of the spermatozoa in incompatible crosses of mosquito culex pipiens l]. 19724638927
[proteases of culex pipiens]. 19724648195
some effects of the juvenile hormone analogue r-20458 on culex pipiens fatigans mosquitoes. 19724648272
[genetic study of the green coloration in larvae and pupae of culex pipiens fatigans wiedemann]. 19724651863
[susceptibility of culex pipiens molestus, forskal mosquitoes of the moscow population to wuchereria bancrofti, cobbold]. 19724653706
[field and laboratory studies of the toxicity of trolen for preimaginal phases of aedes dorsalis mg. and culex pipiens l. mosquitoes]. 19724653711
the inheritance of enlarged tergum in culex pipiens. 19724654692
preliminary laboratory tests with attractiveness of the electroluminiscence light to males and females of culex pipiens l. 19724660787
[cross breeding of wiedmann culex pipiens fatigans colonies from different parts of brazil]. 19724665068
lack of resistance in culex pipiens quinquefasciatus under continuous selection pressure with petroleum hydrocarbons. 19734690289
effect of garlic oil on incorporation of amino acids into proteins of culex pipiens quinquefasciatus say larvae. 19734691909
the effect of environmental temperature upon the transmission of st. louis encephalitis virus by culex pipiens quinquefasciatus. 19734697417
requirement for ribonucleic acid in a semi-synthetic larval diet for the mosquito culex pipiens. 19734697422
experimental infection of anopheles gambiae and culex pipiens fatigans with wuchereria bancrofti in coastal east africa. 19734707754
effect of photoperiod and temperature on ovarian development in culex pipiens pipiens. 19734708144
[mortality of culex pipiens fatigans following infection with plasmodium cathemerium]. 19734714368
[studies on the heredity of susceptibility to the canine filaria, dirofilaria immitis, in culex pipiens fatigans and aedes aegypti]. 19734733216
on the chemical structure of the apical droplet from eggs of culex pipiens. 19734735860
studies on autogeny in natural populations of culex pipiens. 3. midsummer preparation for hibernation in anautogenous populations. 19734744029
[observations on mortality and follicle size of culex pipiens pipiens in the course of hibernation (author's transl)]. 19734744223
1,3-diglycerides from eggs of culex pipiens quinquefasciatus and culex pipiens pipiens. 19734763298
plasmodium gallinaceum: effects of various compounds on immunity of susceptible aedes aegypti and refractory culex pipiens pipiens. 19734773578
[effects of plasmodium cathemerium on the free amino acids and the egg numbers of culex pipiens fatigans (author's transl)]. 19734778579
alkaline phosphatase of culex pipiens fatigans. 19734779287
[experimental infection of aedes aegypti and culex pipiens molestus mosquitoes with tiuleniia virus]. 19734805416
[breeding place of the mosquito culex pipiens (diptera; culicidae) in the city of enakievo of donetsk district]. 19734805430
[resistance of culex pipiens molestus forsk. to boverin]. 19744836623
[detection of latent virus in intestinal and salivary gland cells of the mosquito culex pipiens molestus]. 19744837946
age-grading of culex pipiens fatigans wiedemann from different climatic zones in ceylon. 19744839085
effect of synthetic juvenile hormone on ovarian diapause of culex pipiens mosquitoes. 19744851698
a reexamination of neochordodes occidentalis (montg.) comb. n. (chordodidae: gordioidea): larval penetration and defense reaction in culex pipiens l. 19744856596
[culex pipiens fatigans wiedemann, wuchereria bancrofti cobbold and the economic development of tropical africa]. 19674866449
the development of plasmodium gallinaceum brumpt in the hemocoels of refractory culex pipiens pipiens linn. and susceptible aedes aegypti (linn.). 19684919048
new hypothesis of the cause of cytoplasmic incompatibility in culex pipiens l. 19714937405
suppression and elimination of an island population of culex pipiens quinquefasciatus with sterile males.the release of 8,400 to 18,000 males per day of culex pipiens quinquefasciatus say which had been exposed to a sterilizing agent (thiotepa), suppressed and eliminated an indigenous population of this mosquito on an island off the coast of florida in a 10-week period. sterile males were effective in seeking out and mating with females on the island.19704986308
studies on the control of mosquitoes in egypt by means of chemosterilants. iv. sterilization of anopheles pharoensis and culex pipiens by apholate and thiotepa. 19715004301
[correlation of linkage-groups with chromosomes in the mosquito, culex pipiens l]. 19725032811
hibernaculum choice in culex pipiens. 19725036196
dna content in nine species of nematocera with special reference to the sibling species of the anopheles maculipennis group and the culex pipiens group. 19725043260
chemically-induced inheritable semisterility in the mosquito (culex pipiens molestus). 19725045181
cytogenetic basis of chemically-induced sterility in culex pipiens fatigans wiedemann. ii. cytopathological effects of certain chemosterilants on the gonadal and embryonic tissues. 19725080433
a field release of male culex pipiens fatigans sterilised by apholate. 19715088514
cytogenetic basis of chemically induced sterility in culex pipiens fatigans wiedemann. 3. effect of apholate & hempa on dna synthesis in the gonads. 19715092724
observations on culex pipiens fatigans in ibadan, western nigeria. 19715096377
a report on the resistance of culex pipiens fatigans (wied) collected from calcutta against dieldrin. 19715097064
comparative studies of the effect of x-rays and 1,3-propanedioldimethanesulfonate on the mosquito culex pipiens l. 19715110770
the difference in mortality rate of larvae of dieldrin resistant and susceptible strains of culex pipiens fatigans when reared together in confined containers. 19715112334
meiosis in translocation heterozygotes in the mosquito culex pipiens. 19715131761
isolation and characterization of larvicidal principle of garlic.the larvicidal principles of garlic, allium sativum l.,have been isolated and identified as diallyl disulfide and diallyl trisulfide. both natural and synthetic samples of these larvicides are fatal at 5 parts per million to culex pipiens quinquefasciatus say.19715135721
[susceptibility of culex pipiens, aedes aegypti and anopheles (myzomyia) stephensi to plasmodium (haemamoeba) subpraecox (grassi and feletti, 1892)]. 19715152937
[laboratory and field studies of the chemical control of culex pipiens l. with larvicides]. 19715152948
[an experiment in genetic control of culex pipiens in the area of montpellier]. 19715153483
[sporogonic cycle of p.(haemamoeba) paddae brumpt 1935, in culex pipiens]. 19715155709
[chemosterilization of culex pipiens l]. 19715158860
studies on autogeny in natural populations of culex pipiens. ii. seasonal abundance of autogenous and anautogenous populations. 19715160262
genetic incompatibility and hybridization studies on two members of the culex pipiens complex. 19715160264
studies on cytoplasmic incompatibility in southeast asian culex pipiens fatigans. 19715169146
inherited semisterility for control of harmful insects. ii. degree of sterility and types of translocations in the mosquito culex pipiens l. 19715169617
the inheritance of yellow-larva and ruby-eye in culex pipiens.it has been suggested that mosquito vectors of filariasis and other diseases might be controlled by genetic methods. this is not yet possible because of the lack of genetic information concerning the vector species. the present study describes the development of a marker strain which is being used to study genetic control.two spontaneous mutants of culex pipiens are described, one for the first time. ruby-eye (ru) is an autosomal recessive in linkage group 2. it is completely penetrant and compl ...19655294256
technique for infecting larvae of the culex pipiens complex with a mermithid nematode and for culturing the latter in the laboratory. 19655294258
effects of pollution on the susceptibility to larvicides of culex pipiens fatigans. 19655295151
some effects of polyethylene on the efficacy of larvicides tested against culex pipiens fatigans. 19655295152
development of resistance to various insecticides in culex pipiens fatigans wiedemann.since larvicidal treatment to reduce the numbers of culex fatigans, the tropical house mosquito, offers a promising means of preventing the spread of filariasis, an assessment was made of the liability of c. fatigans to develop resistance to certain important insecticides. strains of this mosquito from burma, cameroon, sierra leone and the usa (california) were submitted to larval selection for periods of seven to 23 generations. it was found that resistance to ddt or deutero-ddt rapidly develop ...19665297003
crossing experiments between fatigans, pallens and molestus colonies of the mosquito culex pipiens s. 1. from japan and southern asia, with special reference to hatchability of hybrid eggs. 19665297295
carbamate-resistance in mosquitos. selection of culex pipiens fatigans wiedemann (=c. quinquefasciatus say) for resistance to baygon.the authors investigated the rate of development and other characteristics of baygon-resistance in culex pipiens fatigans (=c. quinquefasciatus) recently colonized from southern california. selective pressure against the larvae (strain l) for 35 generations resulted in 25.4-fold resistance in larvae, but only 3-fold and 4.8-fold resistance in adults, as determined by contact and topical application, respectively. conversely, selective pressure on adults (strain a) for 24 generations resulted in ...19665297803
positive geotaxis in gravid culex pipiens fatigans. 19665297818
attractant and stimulant factors for oviposition of culex pipiens fatigans in natural breeding-sites.the breeding of mosquito larvae in the field is determined by the ovipositing behaviour of the gravid females. investigation of the chemical factors that induce oviposition is therefore important for understanding mosquito ecology. these substances may also prove to be useful in assessing and controlling mosquito populations.the author has demonstrated two chemical factors, an ovipositing attractant and an ovipositing stimulant, in surface-water. the ovipositing attractant, extracted from surfac ...19665298039
genetical linkage relationships of ddt-resistance and dieldrin-resistance in culex pipiens fatigans wiedemann.the tropical house mosquito culex fatigans readily develops resistance to ddt and to dieldrin and hexachlorocyclohexane. studies of the mode of inheritance of these two types of resistance in material from rangoon selected to a high resistance level showed ddt-resistance to be due to a single principal gene which was almost completely dominant and dieldrin-resistance to be due to a single gene allele neither dominant nor recessive, the hybrids being intermediate.the ddt-resistance factor was lin ...19675298668
exodus from a breeding place and the time of emergence from the pupa of culex pipiens fatigans. 19675298669
examination of the stomach contents of culex pipiens fatigans in rangoon, burma, to determine the origin of the blood-meal. 19675298670
examples of the use of simple age-grading in the assessment of culex pipiens fatigans populations. 19675298671
the biting cycle of culex pipiens fatigans on man in rangoon, burma, and the microfilarial periodicity. 19675298672
gold, a spontaneous dominant mutant showing recessive lethality in culex pipiens (diptera: culicidae). 19675298673
the effect of larval density on mortality of culex pipiens fatigans due to ddt and dieldrin. 19675298674
experiments on the mating of culex pipiens fatigans in the laboratory.few studies have been conducted into the mating and insemination of c. p. fatigans, despite the importance of this behavioural aspect for the production of fertile eggs and their development after a blood meal. moreover, detailed knowledge of the behaviour of male mosquitos is required before the potentialities of genetic manipulation and sterile male techniques for the control and eradication of mosquitos can be fully investigated.the laboratory studies described in this paper show that high pe ...19675298675
cane-sugar feeding in culex pipiens fatigans.the relatively poor results that have been obtained in controlling or eradicating culex pipiens fatigans, the urban vector of wuchereria bancrofti, have made it necessary to obtain as much information as possible about its biology. in this paper the unexpected finding of the influence of cane sugar in delaying oviposition in the gravid female is reported. this is an important finding for those who are investigating the biology of this mosquito in the laboratory and who make use of the age-old pr ...19675298676
infection and reinfection of culex pipiens fatigans with wuchereria bancrofti and the loss of mature larvae in blood-feeding.although previous workers had found no evidence of resistance to superinfection in vectors of filariasis, it was considered desirable to reinvestigate the subject because of the epidemiological implications, since a mosquito that can incubate to maturity successive broods of filarial larvae will obviously be a more efficient vector than one that cannot. the results obtained indicate that a culex pipiens fatigans mosquito that picks up an infection early in its life can, by taking subsequent infe ...19675298677
sterilization of culex pipiens fatigans wiedemann by apholate.the use of alkylating agents has been found to be a promising way of chemosterilizing mosquitos for control purposes. the investigation discussed in the present paper has shown that apholate (2,2,4,4,6,6-hexahydro-2,2,4,4,6,6-hexakis (1-aziridinyl)-1,3,5,2,4,6-triazatriphosphorine) can induce sterility rates of from 43% to 95% in culex pipiens fatigans wiedemann treated in the larval stage, and from 80% to 100% in c. fatigans treated in the adult stage; treatment in the pupal stage produced no s ...19675299862
a study of the age-composition of natural populations of culex pipiens fatigans wiedemann in relation to the transmission of filariasis due to wuchereria bancrofti (cobbold) in ceylon.filariasis due to wuchereria bancrofti is becoming an increasingly important problem in many countries of southern and south-eastern asia. from 1962 to 1964, a study was made of the vector of this disease, culex pipiens fatigans, in two districts of colombo, ceylon, one with vector control by larviciding and one without. catches were made of the house-resting, biting and ovipositing populations, and the stages of ovarian development, parity and infection were determined by examination of the ext ...19675300045
the culex pipiens fatigans problem in south-east asia with special reference to urbanization.in south-east asia in recent years urbanization has proceeded rapidly. because of limited financial resources it has seldom been possible to provide sufficient sanitation; this has led to conditions favourable to the breeding of culex pipiens fatigans. the density of c. p. fatigans is higher in urban areas than in rural ones. differences in infection and infectivity rates in c. p. fatigans seem to be due to differences in infection rates in the human population rather than to differences in the ...19675300060
the significance of the culex pipiens fatigans wiedemann problem in ceylon.bancroftian filariasis became a problem in ceylon after the second world war. the only vector is culex pipiens fatigans, which is widely distributed throughout the country and is prevalent throughout the year. it is a domestic mosquito found resting mainly on hangings and household articles. its biting hours are from dusk to dawn, with peaks around midnight and in the early hours of the morning. so far this mosquito has not been incriminated as either the natural or the laboratory vector of anim ...19675300061
the problem of the culex pipiens complex in the south pacific (including australia).there are three representatives of the culex pipiens complex in the south pacific. c. p. fatigans is the most common and most widely distributed subspecies; it is closely associated with man. the males can be readily distinguished by the structure of the phallosome of the terminalia.c. p. molestus is spread over the southern part of australia and in tasmania; it also is a domestic mosquito. throughout its extensive range in australia, it exhibits all the biological traits that distinguish it fro ...19675300062
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