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Volume 10 (1966)
- Issue 4 Pages 167-
- Issue 3 Pages 105-
- Issue 2 Pages 55-
- Issue 1 Pages 1-
Volume 10, Issue 3
Displaying 1-11 of 11 articles from this issue
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I. Some Aspects on the Torelance to DDT and Sumithion in the LarvaeHitoshi WATANABE, Shigemichi TAKANO1966 Volume 10 Issue 3 Pages 105-109
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSSome notes on the torelance of the silkworm larvae to DDT and Sumithion applied topically have been described in this study. As in the 3rd, 4th and 5th-instar larvae just after ecdysis, the torelance to the toxicants generally increased with age, but the degree of the torelance shown by LD50 per body-weight did not vary from age to age. The torelance of the 5th-instar larvae just after ecdysis markedly increased with feeding mulberry leaves for several hours. The sensitivity to the toxicants was usually the same in both sexes. Larvae were more susceptible to DDT at low (15°C) rather than high (25°C) temperatures, while temperature effect on the susceptibility to Sumithion was larger at high temperature than at low temperature, i.e., the susceptibility to Sumithion demonstrated a positive temperature coefficient.View full abstractDownload PDF (601K) -
Shizuyuki IWAMOTO1966 Volume 10 Issue 3 Pages 110-114
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe seasonal prevalence of the smaller rice leaf miner was observed in the southern part of Ibaraki Prefecture in 1965-1966. In winter, all the developmental stages of the smaller rice leaf miner were found on the gramineous weeds. They occur abundantly in wet places where the weeds grow well during winter. The development of the insects at all stages continued even in winter. The pupae were found on dead leaves and leaf-sheaths of the weeds, and could develop when the dead leaves and leaf-sheaths were sunk under the water. The seasonal prevalence of the adult investigated by net sweepings was plotted as a curve with eight peaks late in January-early in February, mid-April, mid-May, mid-June, late in July, late in August-early in September, mid-October, and late in November-early in December. This indicates the fact that this insect repeats eight generations per year in this area.
The above results was supported by the results of repeated dissections of the weeds collected in the field. Continuous rearing experiments made in the laboratory also showed eight or nine generations per year. This insect attacked the rice plant only in the period from late April till mid-June, and thereafter shifted to weeds.View full abstractDownload PDF (594K) -
III. Relationship between Pébrine Disease of Silkworm Moths and Their Eclosion Dates: The Case of Slightly Diseased Percentages of Moths of a LotKaku OHSHIMA, Yoshiharu HIROSE, Yo KABASAWA1966 Volume 10 Issue 3 Pages 115-122
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSInvestigations on the relationship between pébrine disease of silkworm moths and their eclosion time during each, ripening of larvae and its combination were performed in the case of slightly infected moths from about 10% to 0.3%.
It was revealed that the percentage of diseased female moths always decreased in accordance with the retardation of eclosion date. The average percentage of diseased moths ripened earlier also was superior to those that followed.
The above phenomena, however, did not always fit well on the diseased male moths, although similar characteristics were generally recognized. For instance, in the male moths, there occurred almost always reverse infection percentage on intermediate days and in some case even the average value of the diseased moths derived from the ripened larvae on the following day exceeded those of the first. The average infection percentage of a lot between the female and the male also did not always agree each time.
The male moth, therefore, may not be suitable for the observation of pébrine control.View full abstractDownload PDF (824K) -
Jûrô KOYAMA1966 Volume 10 Issue 3 Pages 123-128
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe outbreak of army worm (Leucania separata WALKER) had been known to occur unexpectedly in the flooded paddy field, but it started to occur usually without relation to the flood from around 1957 in Akita Prefecture. The amount of the nitrogenous manure used in Akita Prefecture increased rapidly in about 1957. The population density of the larva of army worm was high at the deep green rice plant that was supplied richly nitrogenous manure. The survival rate of the larva which were inoculated on the richly nitrogenous manured rice plant was higher than the one inoculated on the standard rice plant. Similar phenomena were found in the fresh weight and the age of the larva.
Judging from the above mentioned observations it was suggested that, the richly nitrogenous manured cultivation of rice plant might have provided some suitable environment for the growth of the army worm and increased the chance of the outbreak of the army worm from around 1957 in Akita Prefecture.View full abstractDownload PDF (635K) -
Masaaki TSUTSUMI, Kiyoshi SAKURAI1966 Volume 10 Issue 3 Pages 129-137
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSSoybean (Glycine Max MERRILL), kidney bean (Phaseolus vulgaris L.), adzuki bean (Phaseolus angularis WIGHT.) and wheat (Triticum vulgare VILL.) were tested to determine the potency of their root diffusates in stimulating the hatching of eggs and the larval emergence from cyst of the soybean cyst nematode, under laboratory conditions.
Cysts and liberated eggs were incubated in Syracuse watch glasses at 25°C containing a small volume of root leachings, soil leachings and diluted root secretions of these plants. The larvae that had hatched or emerged from cysts were counted every week for four or seven weeks.
In general, a significantly great number of larvae was counted in leachings and root secretions of host plants, whereas there was no evidence of stimulating the hatching of eggs and larval emergence in non-host plant leachings and distilled water. The rate of hatching in kidney bean leaching was higher than those of soybean and adzuki bean, particularly evident at the earlier growth stage of these plants.
From the results, it is concluded that hatching of the soybean cyst nematode is apparently stimulated by a substance which is liberated from roots of growing host plants into the root diffusate, whereas earlier workers failed to prove that the root diffusates of host plants stimulate the emergence of larvae from cyst. This series of experiments do not lead to the conclusion that there exists a substance stimulating the larval emergence of the soybean cyst nematode from cyst. Further investigations are being carried out in this direction.View full abstractDownload PDF (978K) -
Akira TAKAI1966 Volume 10 Issue 3 Pages 138-144
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe relative growth relations observed in morphological characters of the rice stem borer, Chilo suppressalis, captured by light trap and reared in the laboratory are presented in this papar.
The relative growth relations are shown by an equation: y=bxα (HUXLEY, 1932)
Values of αs in this equation were approximately 1 for length of fore-wing vs. adult body length or expansion of fore-wings and for adult body weight vs. number of eggs in ovary, and 3 for length of fore-wing vs. adult body weight or number of eggs in ovary. The relative growth relation was also found between larval and adult characters that is, αs were approximately 1 for larval weight vs. number of eggs in ovary and 0.4 for larval weight vs. length of fore-wing. Values of αs for length of fore-wing vs. adult head width were lesser than 1.
The index of wing load of males (1st generation 2.0, 2nd generation 1.9) was lighter than that of females (3.1 and 3.6, respectively). There were no significant differences in relative growth relations between the moths grown on the rice plant and on a water oat, Zizanla latifolia.View full abstractDownload PDF (730K) -
Shinsaku KIMOTO1966 Volume 10 Issue 3 Pages 145-148
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSIn the course of current studies on the Asiatic Chrysomelidae, the author has come to the conclusion that a citrus flea beetle, described by CHÛJÔ in 1958 under the name of Clitea citri from the Okinawa Is. is no doubt identical with C. metallica CHEN, originally described from Tonkin and known also from Central and Southern China as a serious pest of citrus trees and the species is widely distributed in the Ryukyu Archipelago. The following list is compiled from references and the data obtained by the author from the collections of insects in Naturhistorisches Museum in Vienna and the entomological survey of the Ryukyu Archipelago in 1953∼1954 under the Japan-U.S. Cooperative Science Program.
1) Ryukyu Archipelago: Okinawa Is. (Izumi, Nakijin and Nakasone). Ishigaki Is. (Banna-dake, Omoto-village, Kabira-Yoshiwara and Toro-gawa). Iriomote Is. (Kanpire-daki, Inaba, Shirahama-Sonai and Ushikumori).
2) Taiwan: Takao (after KIMOTO, in press)
3) China Szechuan (after GRESSITT & KIMOTO, 1963). Hunan (after GRESSITT & KIMOTO, 1963). Chekiang (after PENG, 1935). Kiangsi (after GRESSITT & KIMOTO, 1963). Kwangsi (after CHEN, 1939). Kwangtung (after HOFFMANN, 1935; after GRESSITT & KIMOTO, 1963). Hainan (after GRESSITT & KIMOTO).
4) N. Vietnam: Hanoi and Hoa-Binh (after CHEN, 1933, 1934).View full abstractDownload PDF (960K) -
Tosihiko HUKUHARA, Yoko HASHIMOTO1966 Volume 10 Issue 3 Pages 149-155
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSOutbreak of the nuclear-polyhedrosis of Hyphantria cunea was observed in the second generation of 1959 and 1965. Two types of polyhedra were observed: one was hexahedron and the other was tetrahedron. The polyhedra were found in the cell nuclei of epidermis, fat body and tracheal matrix. In the early stage of infection, a chromatin mass appeared in the center of the nucleus, where many rod-shaped virus particles (360mμ×30mμ) were observed. In the surrounding nucleoplasm virus bundles consisting 2-14 rods were found. The membrane-covered rods became enclosed within a polyhedron. In the late stage of infection the nucleus was filled with large number of polyhedra. Interference was observed between the hexahedron virus and the tetrahedron virus. The latter was more virulent and multiplied more rapidly. Nuclear-polyhedrosis virus of H. cunea was not pathogenic to Bombyx mori. The inclusion body of the granulosis of H. cunea was 380-520mμ in length and 200-360mμ in width. They contained single rod-shaped virus particle.View full abstractDownload PDF (4188K) -
Atsushi SUGIMOTO1966 Volume 10 Issue 3 Pages 156-162
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSResidual γ-BHC in rice grains and straws were determined by a bioassay method with the use of Adzuki-bean weevil, Callosobruchus chinensis L. The samples were taken from some paddy fields where BHC granules and/or fine dusts had been applied in the irrigation water at the rates of 1.2-8.7kg in ingredient per ha (1.07-7.7lbs. per acre) for controlling rice stem borer. The samples were extracted with n-hexane and the separation of the extracts were carried out by column chromatographic procedure. Under this procedure, 2μg of γ-BHC could successfully be separated from the extract corresponding to 100g of polished grains and 1.6-1.7μg could be separated from 2μg with the extract corresponding to 10g of the bran. The amounts of γ-BHC detected in the polished grains, brans, unpolished grains, hulls and the straws were 0.002-0.051, 0.05-0.53, 0.013-0.081, 0.01-0.18, and 0.1-1.8ppm respectively. It has been ascertained that the large amount of the residual γ-BHC in the rice plant remains in the straws but a little amount of it translocates into the grains, and that the residue in the grains is particularly concentrated in the part of the bran.View full abstractDownload PDF (1602K) -
I. Susceptibility of the northern root lesion nematode (P. penetrans) and the walnut root lesion nematode (P. vulnus) to D-DIchiro CHIKAOKA1966 Volume 10 Issue 3 Pages 163-164
Published: September 25, 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (261K) -
1966 Volume 10 Issue 3 Pages e1
Published: 1966
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (29K)
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