| observations on the flight activities of culex pipiens fatigans in rangoon, burma. | knowledge of the behaviour of a vector is often of value in devising suitable methods for assessing control or eradication measures. flight behaviour is particularly important, since it is during this activity of a mosquito that trapping is possible. trapping data have proved useful in the assessment of the action of insecticides on the vectors of malaria, and there is no reason why this should not also be the case with the vectors of filariasis.in this paper the difficulties of trapping culex p ... | 1967 | 4227194 |
| dispersion studies of culex pipiens fatigans tagged with 32p in the kemmendine area of rangoon, burma. | the flight range and the dispersion of a vector are important factors when control or eradication measures are being considered and when general biological information is desired. the present work on culex pipiens fatigans was carried out under conditions where breeding is intensive and housing congested. the radioactive tagging method adopted seemed to be harmless to the mosquito and gave excellent results.radioactive adults emerging under normal conditions from larvae collected in the centre o ... | 1967 | 4227195 |
| outdoor resting of culex pipiens fatigans in rangoon, burma. | the sites occupied by resting adult mosquitos are of importance, since they may be accessible to treatment with insecticide. it has usually been assumed that culex pipiens fatigans feeds and rests indoors, thus making itself vulnerable to indoor spraying. however, work in the kemmendine experimental area of rangoon, burma, has now shown that many c. p. fatigans rest out of doors in a variety of shelters. the lower parous rate in outside catches as compared with indoor catches tends to confirm th ... | 1967 | 4227197 |
| the duration of egg, larval and pupal stages of culex pipiens fatigans in rangoon, burma. | laboratory experiments to determine the duration of the immature stages of culex pipiens fatigans were carried out because such information is important from the point of view of control by larvicides. at a temperature of 25.1 degrees c+/-0.7 degrees c the mean incubation period is 27.11+/-0.57 hours. females spend a longer time in the pupal stage than males (34.16+/-0.74 hours and 32.95+/-0.75 hours, respectively, at 28.6 degrees c+/-0.8 degrees c; there is no 24-hour pupating or emerging rhyth ... | 1967 | 4227199 |
| evaluation of wuchereria bancrofti infection in culex pipiens fatigans in rangoon, burma. | in the past, several indices have been proposed to evaluate the threat of vectors to the community. such indices, if accurately determined, could serve to assess the effectiveness of vector control campaigns. in this paper, a "risk of infection" index is introduced for the case of urban filariasis transmitted by culex pipiens fatigans in rangoon, burma. this index is directly proportional to the three principal parameters that determine the extent of transmission-namely, the biting density of th ... | 1967 | 4227200 |
| the susceptibility of culex pipiens fatigans larvae to insecticides in rangoon, burma. | since april 1963, the susceptibility to insecticides of larvae of culex pipiens fatigans has been extensively studied by the who filariasis research unit in rangoon, burma, as part of a programme of research aimed at establishing which compound or group of compounds could be used to control the vector of filariasis.larvae from various localities in rangoon showed wide variations in susceptibility to chlorinated hydrocarbons. there were also seasonal variations and it was difficult to standardize ... | 1967 | 4230023 |
| on the inefficiency of transmission of wuchereria bancrofti from mosquito to human host. | the high biting rate of culex pipiens fatigans in rangoon, combined with a low prevalence of microfilaraemia due to wuchereria bancrofti, suggested a poor efficiency of transmission. data obtained by the who filariasis research unit in rangoon were analysed, and the efficiency of the parasite from stage iii larva in the mosquito to the production of microfilariae was estimated as 6.04-6.71 x 10(-5), indicating that an average of around 15 500 bites by "infective" mosquitos is necessary to produc ... | 1968 | 4235739 |
| summary of field trials in 1964-69 in rangoon, burma, of organophosphorus larvicides and oils against culex pipiens fatigens larvae in polluted water. | in tests in rangoon, burma, of the larvicidal activity of various organophosphorus compounds against c. p. fatigans, it was found that the activity usually lasted much longer in septic tanks and pit latrines than in open drains. dursban, abate, fenthion and several other emulsifiable concentrates caused high larval mortality at a concentration of 0.05 ppm but 0.5 ppm was normally required to obtain a minimum of 1-2 weeks of complete larval control. for the desired residual activity, dosages abou ... | 1970 | 4253561 |
| a high incidence of green coloration in newly-emerged adult populations of culex pipiens fatigans in rangoon, burma. | | 1971 | 4258432 |
| studies on infiltration of marked culex pipiens fatigans into sprayed areas in rangoon, burma. | | 1971 | 4259241 |
| breeding sites of culex pipiens fatigans in areas of rangoon, burma sprayed with fenthion larvicide, 1967-1969. | | 1971 | 4259331 |
| observations of the guppy, poecilia reticulata peters, in culex pipiens fatigans breeding sites in bangkok, rangoon, and taipei. | | 1972 | 4261424 |
| changes in the age structure of culex pipiens fatigans wiedemann populations in rangoon, burma after intensive larviciding. | | 1972 | 4262363 |
| susceptibility of culex pipiens fatigans to fenthion in rangoon, burma, 1963-69. | | 1970 | 4250698 |