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Volume 17 (1966)
- Issue 4 Pages 223-
- Issue 3 Pages 161-
- Issue 2 Pages 83-
- Issue 1 Pages 1-
Volume 17, Issue 3
Displaying 1-17 of 17 articles from this issue
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Article type: Cover
1966 Volume 17 Issue 3 Pages Cover6-
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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Satoshi Shinonaga, Rokuro KanoArticle type: Article
1966 Volume 17 Issue 3 Pages 161-163
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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Rokuro Kano, Satoshi ShinonagaArticle type: Article
1966 Volume 17 Issue 3 Pages 164-168
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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[in Japanese]Article type: Article
1966 Volume 17 Issue 3 Pages 168-
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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Kiyotoshi Kaneko, Rokuro KanoArticle type: Article
1966 Volume 17 Issue 3 Pages 169-172
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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Mutsuo Kato, Shoichi Yoshida, Takashi IshiiArticle type: Article
1966 Volume 17 Issue 3 Pages 173-179
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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Katsumi Saito, Shigeo HayashiArticle type: Article
1966 Volume 17 Issue 3 Pages 180-183
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSChanges in the age-composition of a Culex pipiens molestus population at an underground breeding site in downtown of Tokyo were observed from December 1963 to April 1964. Mosquito collections were made with a sucking tube once in a week or two and their ages were determined by counting numbers of relics in the ovarioles. The breeding place is located at the bottom of a building and was observed to be well closed and isolated from outside. Not a single blood-fed mosquito was collected. The population was apparently having been maintained by autogenous proliferation. 318 out of 794 total number of dissected female mosquitos were found parous, however, only 5 among them were biparous and none triparous or over. The development of follicles was observed extremely retarded in the parous mosquitos. The evidences indicated that under the circumstance without blood sources the mosquitos principally laid eggs only once in a lifetime. A period analysis showed that the parous rate fluctuated at 6 week interval. The room temperature was at a fairly constant level from 15°to 20℃ and the temperature of breeding water at 13°to 16℃ during the period of observation. There were no correlation observed between the parous rate and the environmental conditions. So the periodical changes in the parous rate might be interpreted as a result of the periodical reproduction of the population. An exceeding correlation between the parous rates and the mating rates could be observed.View full abstractDownload PDF (522K) -
[in Japanese], [in Japanese], [in Japanese]Article type: Article
1966 Volume 17 Issue 3 Pages 183-
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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Katsuhiko MatsumotoArticle type: Article
1966 Volume 17 Issue 3 Pages 184-190
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSTo search for the factors of producing hypopus in grain mites, the author observed changes of population and age composition in Lardoglyphus konoi through breeding experiments under different relative humidities on the following series of diets. About 300 mites were inoculated on 10g of diets composed of dried fish meal powder (niboshi) at the ratio of 10 : 0, 8 : 2, 6 : 4, 4 : 6, 2 : 8, 0 : 10 respectively, and each of these series was kept under the relative humidities 64%, 75%, 85%, and 94%, in an incubator at 25℃. At 94% R. H., slight reproduction occurred in 2 weeks but diminished till following week. In each series, the highest count of mites was observed under 85% R. H., but the longevity did not last for 5 weeks. The highest count of all the cases, 1640 individuals per 0.5g, was seen on 0 : 10 fish meal diet at 4 weeks under 85% R. H. The time to reach the highest count became shorter in accordance with the ratio of fish meal in diets increased. The period of existence was longest at 75% R. H. that lasted for 11 weeks especially on 6 : 4 and 4 : 6 fish meal diets. At 64% R. H. the mites could not survive. As for the age composition the following three phases were distinguished : Growing phase, in which the population in larval stage was highest, stable phase, the population in each stage appeared on the average and senile phase, the population in adult was highest. The age composition under 75% R. H. which showed either growing or stable phase in process of increase turned gradually into senile phase, and diminished after the climax. As to the 6 : 4 and 4 : 6 fish meal diets, the senile phase after the climax changed once into growing phase in 9 weeks and into senile again the following week. Under 85% R. H., change of the age composition took two types according to the diets : growing phase at 2 weeks, senile at 3 weeks and stable at 4 weeks on 10 : 0 to 4 : 6 fish meal diets, whereas on 2 : 8 and 0 : 10 fish meal diets growing and senile phase respectively at 2 weeks, both senile at 3 weeks and both growing again at 4 weeks. The hypopus appeared in 10% after 4 weeks on 2 : 8 fish meal diet under 75% R. H., while they were scarcely found under the other relative humidities in this experiments.View full abstractDownload PDF (765K) -
Tokuko Umino, Takeshi SuzukiArticle type: Article
1966 Volume 17 Issue 3 Pages 191-195
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSThe mode of inheritance of malathion resistance among larvae of Culex pipiens fatigans was studied. A homozygous susceptible colony (SS) was separated from a mixed field population by the same method as adopted in the separation of dieldrin- or DDT-susceptible colonies. This method is as follows : Larvae from an egg-raft are reared in a vessel. Twenty or thirty of 3 rd-instar larvae from each egg-raft are exposed to a dipping test. If higher mortality is evident, the remaining larvae were pooled to produce the next generation. After repeating the procedure for 8 generations, a homozygous susceptible colony was established. The homozygous resistant colony (RR) was obtained by selection with the pressure of malathion. The ld-p line (log dosage-mortality regression line) of the hybrids (F1) after crossing the susceptible colony with the resistant one was straight and was located intermediate to the RR and SS lines as shown in Fig. 3. The progeny of the back cross of F1 with SS (P) showed a curved ld-p line with one plateau at about 50% mortality, and of F1×RR (P), an inflection point at about 50% mortality as shown in Fig. 5. F2 obtained from mass-mating of F1 showed a curved ld-p line with one plateau at about 25% mortality and with one inflection point at about 75% mortality as shown in Fig. 4. In view of the results mentioned above, the authors were led to the conclusion that the mode of inheritance of malathion-resistance in C. p. fatigans was autosomal and monofactorial, and that the resistant factor was partially dominant to the susceptible one. By drawing an ld-p line of malathion on logprobability paper using the larvae of any population and by determining the plateau in the ld-p curved line, the configuration ratio of SS : (RS+RR) in the population might be estimated easily.View full abstractDownload PDF (576K) -
[in Japanese]Article type: Article
1966 Volume 17 Issue 3 Pages 195-
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
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Shunnosuke Hirakoso, Motokiyo UchidaArticle type: Article
1966 Volume 17 Issue 3 Pages 196-200
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSTwo colonies of bacteria, Pseudomonas aeruginosa and Alcaligenes viscolactis var. were isolated from water containing laboratory animal food, after incubation for a week at 28℃. Reduction of the effects of parathion, methylparathion, fenthion, DDT, diazinon, fenitrothion and lindane on mosquito larvae by these colonies was tested. Fenitrothion, parathion and methyl parathion were converted to non-toxic materials such as amino-fenitrothion, amino-parathion and amino-methylparathion within 1 to 2 days in living bacterial cells of the two colonies. The effects of fenthion, DDT, diazinon and lindane lasted 16 days under these conditions even though some reductions or conversions of the toxicants were apparent.View full abstractDownload PDF (605K) -
Kazuki Ogata, Ikuo Tanaka, Takeshi SuzukiArticle type: Article
1966 Volume 17 Issue 3 Pages 201-204
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSLaboratory tests on the sterilizing effect of Metepa and Hempa to house flies were conducted. The chemicals were treated to adult flies by topical application method and by bait method with milk solution. Treatments of Metepa by topical application caused a reduction in the number of eggs produced and of larvae hatched out. Males were more affected than females. ED-50 value, when treated to both sexes, was approximately 7.5μml. When treated female crossed with normal male, ED-50 was approximately 30μml. In the test of bait treatment, the reduction of egg production was more remarkable in the case of crossing of treated females with normal males than in the reverse case. When a small dose of Hempa less than 80μml per fly was topically treated, the egg production was not affected, but most of the eggs could not hatch out in the doses of 20〜80μml. ED-50 of Hempa was estimated to be approximately 25μml per fly. Bait treatment of Hempa with a higher concentration than 0.25% was proved to make the flies completely sterile.View full abstractDownload PDF (405K) -
Akifumi HayashiArticle type: Article
1966 Volume 17 Issue 3 Pages 205-208
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSCo-operative effects of two kinds of synergists mixed with allethrin were observed and compared with each other using Film and Nagasawa's Methods. Several rates of mixture of two kinds of synergists out of 4 (piperonyl butoxide, S-421, Synepirin-222 and Synepirin-500) were made and 6 of those, see Table 2, were tested on the hous fly, Musca domestica vicina of Takatsuki lineage. Mixed rate of allethrin and synergists was 1 : 5 and those of two co-operative synergists were 100 : 0, 80 : 20, 60 : 40, 40 : 60, and 20 : 80. The values of co-operative effects were calculated by Buchfield Method. Antagonistic relations were observed between two kinds of synergists except of piperonyl butoxide and Synepirin-500. So the author came to conclusion that co-operative effect of synergists is hopeless as far as allethrin is used as effective insecticide except of special case.View full abstractDownload PDF (315K) -
Koji Ogushi, Iwao Tokumitsu, Tomiko IwataArticle type: Article
1966 Volume 17 Issue 3 Pages 209-213
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSTests on effect of insecticides on adults of housefly and German cockroach were carried out by dipping technique. The insecticides employed were as follows : Tech. -DDT. lindane, dieldrin, DDVP, Dibrom, diazinon, ronnel, Baytex, Sumithion, Dipterex, malathion. Adults of housefly and German cockroach were immersed for three minutes in diluted aqueous solution of acetone or ethanol containing a required concentration of each insecticide. Mortality was recorded after 24 hours. Effects of dipping tests were evaluated differently and compared with those of topical application. Effects of DDVP, Dibrom, Dipterex and malathion of dipping were especially lower in comparison with those of topical application. Moreover, the mortality was affected strongly by the susceptibility of insect strain tested. Housefly adults used here showed resistance to organochlorinated insecticides and diazinon of topical application tests and the effectiveness which was commpared with LC_50 of dipping tests was declined in following order : ronnel, Baytex, Dibrom, Sumithion, diazinon, lindane, DDVP, DDT, malathion, dieldrin, Dipterex. German cockroach showed no resistance to insecticides tested (dieldrin, lindane, Baytex, Sumithion, diazinon, ronnel, Dibrom, DDVP, DDT, malathion, Dipterex).View full abstractDownload PDF (477K) -
Kazuo Yasutomi, Yoshisato Inoue, Tetsuya Ohtaki, Syoziro AsahinaArticle type: Article
1966 Volume 17 Issue 3 Pages 214-217
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSSince 1964 we have been engaging in checking the development of insecticide resistance in German cockroach, Blattella germanica. Samples of cockroaches were collected from about twenty different places of Japan. The results may be summarized as follows : Females of the field colonies showed less than 50% mortality to dieldrin at 0.25g/m^2 after 7 days' continuous exposure. Even at 2.5g/m^2, several colonies showed only low mortalities not attaining 50%. On topical application test these resistant cockroaches showed (LD)_<50> values against dieldrin after 7 days at least 370 times that of the normal strain. The dieldrin-resistant colonies were also resistant to γ-BHC and chlordane, the (LD)_<50> value being about 20 times the normal for γ-BHC and about 60 times for chlordane. These resistant colonies were found to be still quite susceptible to organophosphorus compounds such as fenitrothion and diazinon.View full abstractDownload PDF (438K) -
Sadao Fujito, Kazuo Buei, Tosihisa Saito, Misada TaniguchiArticle type: Article
1966 Volume 17 Issue 3 Pages 218-222
Published: October 31, 1966
Released on J-STAGE: September 05, 2016
JOURNAL FREE ACCESSDuring summer and autumn of 1964, a field test of fly control with residual treatments of Baytex and dimethoate was carried out in a poultry ranch of Osaka prefecture. Sixteen species of flies were collected in a poultry ranch (Table 1). The dominant species were Sarcophaga peregrina, Fannia scalaris and Ophyra nigra. Emulsion of Baytex was applied in the southern part of the ranch, and wettable dust of dimethoate in the northern part. 0.5% emulsion or suspension of each insecticide was sprayed on the ceiling and walls, at the rate of 50ml per square meter. These applicalions were made with motor compression sprayer. Population density of each flies was estimated by counting the flies adhering to sticky fly tapes which were located at poultry ranch or dwellings. In the results, the population of flesh flies, Sarcophaga peregrina, was markedly decreased after those applications. The reduction of fly populations was also observed in the neighboring houses, but the effect was not limited to flesh flies. It was supposed that the decrease may be attributable mainly to the effect of residues treated on the poultry ranch, and its effect was given for a month.View full abstractDownload PDF (485K)
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