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Volume 2 (1967)
- Issue 4 Pages 173-
- Issue 3 Pages 115-
- Issue 2 Pages 61-
- Issue 1 Pages 1-
Volume 2, Issue 2
Displaying 1-8 of 8 articles from this issue
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Yasuharu MAMIYA1967 Volume 2 Issue 2 Pages 61-68
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSThree species of Trichodorus have been found in forest nurseries located at various regions in Japan. Trichodorus cedarus YOKOO, 1964 was the most widely distributed species out of three. The original description of this species was supplemented using specimens from a nursery in eastern Japan. T. cedarus is distinguished by a relatively long onchiostyle, male having three venromedian papillae located posterior to the onchiostyle base, cutinized vaginal pieces being conspicuous and characteristically triangular, and female having a pair of ventrosubmedian pores just behind the vulva. Females of T. minor COLBRAN, 1956 and T. porosus ALLEN, 1957 were collected with several species of forest tree seedlings.View full abstractDownload PDF (737K) -
Keizi KIRITANI, Katutiyo KIMURA1967 Volume 2 Issue 2 Pages 69-78
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSThe effect of parental age on the life cycle of Nazara viridula was studied. The experiments were carried out at 25°C under 15 hr illumination. The hatchability of eggs decreased with progress of the age of the mothers. With aging of parents the larval period fluctuated. However, appreciable changes in the duration of larval period, averaging about 30 days, was not observed with aging of parents. The survival rate decreased with increasing parental age among the larvae originated from the egg masses which were deposited after the 30th day since the beginning of oviposition. No adults were recruited from the eggs deposited after the 70th day. The female offspring from the older parents were short lived, and contained a smaller proportion of reproductive females with a low fecundity as compared with those from the younger parents. The biological properties of F2 progeny were affected by the ages of both grandmother and mother. Unlike the F1 progeny, all F2 eggs except those of the first egg mass hatched successfully. The prolongation of the duration of larval stage and the decrease in the survival rate of F2 larvae tended to associate with progress of the ages of both grandmother and mother. A discussion was held regarding the possible effect of parental age on the life cycle of this insect species under natural conditions.View full abstractDownload PDF (754K) -
Masatoshi KOBAYASHI, Shigeru KIMURA, Masayoshi YAMAZAKI1967 Volume 2 Issue 2 Pages 79-84
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSThe mode of action of insert hormone and its related substance upon the metabolism of diapausing pupa was studied on the pupa of Samia cynthia pryeri. The brain was extirpated from each pupa at the dormant stage. The brainless pupae were kept at 25°C for 5 weeks prior to use. 14C-glucose of 0.1 μc was injected with each of the following substances, such as ecdysone, proteinic brain hormone or cholesterol having brain hormone activity, into the pupae respectively. Twenty-four hours following injection, the incorporation of radioactive glucose into carbon dioxide, trehalose, glycogen, crude lipid, and crude protein was measured by several methods, obtaining the following results.All of the substances injected acted on carbohydrate metabolism in the brainless pupa and they promoted the biosynthesis of trehalose. In control insect without injection of hormones or cholesterol, however, radioactive glucose was incorporated into glycogen in the fat body and scarcely incorporated into blood trehalose. On the other hand, incorporation of 14C-glucose to crude lipid and crude protein showed a low value, though either insect hormone or cholesterol was injected. From the afore-going results, it is concluded that insect hormones, ecdysone and brain hormone, are conerned with carbohydrate metabolism of Samia cynthia pryeri.View full abstractDownload PDF (593K) -
J.P. SRIVASTAVA, S.C. SAXENA1967 Volume 2 Issue 2 Pages 85-92
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSThe localization studies on alkaline and acid phosphataes, in alimentary tract, salivary glands and malpighian tubules of both the just hatched nymphs and adults Periplaneta americana were made at pH 9.2 and 5.2 respectively using sodium β-glycerophosphate as substrate. The alkaline phosphatase was found to be widely distributed in alimentary tract, salivary glands and malpighian tubules of both the nymphs and adults. The acid phosphatase activity was completely lacking in the just hatched nymphs, whereas in the adults the positive activity was completely shown in midgut, salivary glands and malpighian tubules. The functional significance of alkaline phosphatease was discussed on the basis of its presence at the sites of active solute trasporation, chitinization, growth and degeneration. Importance of acid phosphatase is not well understood. Perhaps it plays some role in digestion.View full abstractDownload PDF (880K) -
Sumio TOJO, Chisato HIRANO1967 Volume 2 Issue 2 Pages 93-99
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSThe acid-soluble nucleotides of pupae of the rice stem borer, Chilo suppressalis, were fractionated by anion-exchange chromtography. Adenosine diphosphate, ATP, CTP, GDP, GTP, UDP, UTP, and UDP-sugar(s) were isolated and identified from the pupae at all stages. The ATP and ADP contents are almost constant during the early half of the pupal stage, but rapidly increase from the middle stage to adult emergence. The ratio of ATP to ADP tends to decrease through pupal period. UDP-suger(s) level becomes maximum on the second day after pupation, then decreases conspicuously to adult emergence. The other nucleotide levels fluctuate with pupal development. These changes of the nucleotide level are discussed in relation to some aspects of metamorphosis.View full abstractDownload PDF (680K) -
Hitoshi HASEGAWA, Yoshiaki ITO1967 Volume 2 Issue 2 Pages 100-110
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSThis paper is a preliminary report on the adult biology and the role of bird predation on the adult stage of the fall webworm, Hyphantria cunea, accidentally introduced in Japan. The results are summarized as follows : (1) Progress of eclosion of the overwintering generation was restrained by low temperature, and the seasonal fluctuation of eclosion was precisely detected by the ligth-traps as well as by the direct observation. (2) The eclosion occurred during the evening and the night, and mating at dawn. Sexual flight of males ceased just after the beginning of the dawn chorus of the tree sparrow. (3) Fresh adults were very conspicous when resting on tree-trunks and they were intensively picked up by tree sparrows and grey starlings. From the preliminary numerical observations, tree sparrows were considered to be playing an important role in controlling the number of H. cunea.View full abstractDownload PDF (1030K) -
Michihiko SAKAI1967 Volume 2 Issue 2 Pages 111-112
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSDownload PDF (333K) -
Jun MITSUHASHI, Socho NASU1967 Volume 2 Issue 2 Pages 113-114
Published: June 25, 1967
Released on J-STAGE: February 07, 2008
JOURNAL FREE ACCESSDownload PDF (899K)
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