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Volume 27 (1983)
- Issue 4 Pages 247-
- Issue 3 Pages 171-
- Issue 2 Pages 77-
- Issue 1 Pages 1-
Volume 27, Issue 4
Displaying 1-14 of 14 articles from this issue
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Kisaku AKUTSU, Mikio KUBOKI1983 Volume 27 Issue 4 Pages 247-251
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSObservations and analytical experiments were conducted on the mating behavior of the udo longicorn beetle, Acalolepta luxuriosa BATES. It was found that the vision does not play an essential role in the recognition of the female by the male. The males recognized sexually mature females through the contact chemoreceptors of antennae. The pheromone was supposed to be spread over the surface of the female body. The effect of pheromone in eliciting the mating behavior in the male decreased gradually to zero on the 17th day after the death of the female. It was also shown that the female may recognize males of the same species through the chemosensory cues of antennae and palpi.View full abstractDownload PDF (1308K) -
II. Damage Caused by Adult and Larval Infestation and Estimation of the Tolerable Injury LevelHitoshi TSUZUKI, Tetsu ASAYAMA, Masaaki TAKIMOTO, Tsugio SHIMOHATA, Ju ...1983 Volume 27 Issue 4 Pages 252-260
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSEffect of infestation with the rice water weevil on the growth and yield of rice was determined by releasing adults on rice plants. The experiment was performed in screened cages. To distinguish the damage caused by adult and larval stages, respectively, diflubenzuron which selectively prevents the larval infestation was used. As a result of adult infestation the growth rate of plant and tillering ability were delayed, whereas larval infestation seriously affected plant height and reduced the number of tillers. But, the plant was able to recover to some extent when it reached the heading stage. No yield loss resulted from adult infestation alone. However, when adult infestation was followed by larval infestation, significant yield loss was observed. When rice plants were infested with adults immediately after transplanting, the following regression equation was obtained Y=8.44+13.98logX, where Y refers to the percentage of yield loss and X is the log number of adults released. From this equation, the tolerable injury level, defined as the maximum injury level that will cause practically no yield loss (KIRITANI, 1980), was determined and found to correspond to 0.25 adults per hill, when expressed in terms of pest density.View full abstractDownload PDF (1077K) -
I. Population Growth and Distribution Pattern on Cucumber in GreenhouseAkira KAWAI1983 Volume 27 Issue 4 Pages 261-264
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSPopulation growth and distribution pattern of Thrips palmi KARNY on cucumbers in the greenhouse were investigated from September to November 1981. When 662 adults of T. palmi were released late in September, the tendency of increase in the number of adults per plant fitted well with the equation of exponential growth (Nt=N0⋅ert) until the leaves of cucumber plants were damaged by low temperature. The intrinsic rate of increase (r) was estimated to be 0.05 per day. Adults of T. palmi were chiefly found on middle leaves (5 to 10 leaves beneath the apical leaf) before topping and on apical leaves after topping. Larvae were chiefly observed on the lower leaves (10 to 15 leaves beneath the apical leaf) on which mostly adults had been observed 7 days before. Adults were distributed among plants at random. On the other hand the distribution of larvae was moderately contagious. When leaf size was adopted as the size of the sampling unit, the distribution of both adults and larvae was highly contagious.View full abstractDownload PDF (497K) -
Junichi YUKAWA1983 Volume 27 Issue 4 Pages 265-269
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe soybean pod gall midge, Asphondylia sp. has been known to exist only in Japan, being distributed in Honshu, Shikoku and Kyushu, as far south as Tanegashima Island. However, recent studies on the host range of the species and on the distribution pattern of its relatives indicated the possibility that it might be distributed in more southwestern islands. To detect the species in these islands, two kinds of soybean cultivar were grown in Amami and Okinawa Islands in March-October, 1982. Some infested pods were found on the cultivar, “Kogane” which had been sown on 23 August in Amami Island. The males obtained by rearing the midge pupae were identified as the soybean pod gall midge. Therefore, the southern limit of the species distribution expanded from Tanegashima Island to Amami Island. Although there was no sign of attack by the gall midge on the soybean in Okinawa Prefecture, its existence was suspected by the present result and by the fact that a close relative (probably identical species) was recently collected in Indonesia.View full abstractDownload PDF (504K) -
Yoshiko OHGUCHI, Hideaki SUZUKI, Sadahiro TATSUKI, Jun-ichi FUKAMI1983 Volume 27 Issue 4 Pages 270-275
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSOxygen absorber (Ageless®), which have widely been used for protection from oxidation or molds in various foods, showed apparent lethal effect on four stored grain pests, Sitophilus zeamais, Tribolium castaneum, Callosobruchus chinensis, and Ephestia cautella and two clothes pests, Tinea pellionella and Anthrenus verbascii, when they were kept in O2-barrier packages containing the oxygen absorber and their food source. Tolerance level of the insects against low O2 conditions was shown to vary considerably with species and stages, the highest tolerance being shown by egg of S. zeamais which needed 12 days treatment with the oxygen absorbers for 100% mortality. As a sublethal effect of the oxygen absorbers, delay of adult eclosion was observed in S. zeamais. Application of the oxygen absorber to pest control was discussed.View full abstractDownload PDF (747K) -
Takashi OGATA, Mitsuhiro SASAKAWA1983 Volume 27 Issue 4 Pages 276-279
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe aestivation shown by the decrease of feeding activity was induced by a long photoperiod (15L-9D) 25 and 15 days after the start of rearing of adults at 20 and 30°C, respectively. It was, however, prevented by a short photoperiod (10L-14D) at 20°C, and the female beetles laid eggs 20 days after the start of rearing. Mean amount of leaves eaten by beetles during the period of aestivation was not differentiated significantly between the both temperature conditions. When the beetles experienced the aestivation at the long-day condition were transferred to the short-day, they resumed feeding and the female beetles began to lay eggs which were not different significantly in the total number from those by the inexperienced females in aestivation.View full abstractDownload PDF (474K) -
Kouichi INOUE, Manabu TANAKA1983 Volume 27 Issue 4 Pages 280-288
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSAdult females of A. terminalis fed preferably on eggs of P. citri, and seldom on the larvae and protonymphs. When the density of prey eggs was lower (2-16 eggs/leaf), rates of predation per day by predator were 30-45%. The average number of eggs consumed per day by adult females of the predator was 1 at 15°C, 2.4 at 20°C, 6.1 at 25°C and 3.4 at 30°C. The average number of eggs laid per day by the predator was 1.5 at 20°C, 3.8 at 25°C and 3.1 at 30°C. At 25°C and 30°C, finite rates of natural increase of A. terminalis per 10 days (e10rm) Were lower than those in P. citri, but were almost equal to those in P. citri at 20°C. At 25°C, A. terminalis suppressed its prey population under 3.4 adult females per leaf, when the ratio of predators released was higher than 5:1 (prey: predator). This predator population was dependent on the prey density. The degree of suppression of the prey population by A. terminalis was considerably lower than that in Amblyseius eharai AMITAI et SWIRSKI. A. terminalis hibernated in adult females on the underside of leaves in the citrus grove, but their mortality rate was very high.View full abstractDownload PDF (1045K) -
Masahiko KUWAHARA, Masaaki SAWADA, Atsuo KUBOTA, Naoki IWATA1983 Volume 27 Issue 4 Pages 289-294
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSSusceptibility of several strains of T. kanzawai and T. urticae to several organophosphates and specific acaricides was determined by the spray technique. Collected strains of T. kanzawai and T. urticae showed a high degree of resistance and a similar resistance patterns to various organophosphates. These results show that there is cross resistance to organophosphates and imply that major resistance factors are involved in organophosphate resistance. On the other hand, the resistance patterns to specific acaricides varied with populations and acaricides. These differences in resistance to specific acaricides were more acute in populations of T. kanzawai than in those of T. urticae. Dicofol resistance was shown to confer a high to moderate degree of cross resistance to chlorbenzilate and phenisobromolate, and a minor degree of cross resistance to tetradifon.View full abstractDownload PDF (784K) -
Takashi NODA, Seiya KAMANO1983 Volume 27 Issue 4 Pages 295-299
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe bean bugs, Riptortus clavatus were reared in order to determine which essential vitamins and amino acids should be added to artificial diets in which one of nine B vitamins or nineteen amino acids was omitted from the diets. No adults emerged when riboflavin was omitted, and the growth of nymphs was delayed when any one of the following vitamins, thiamine, pyridoxine, and folic acid, was omitted from the diets. Only a few adults emerged when fed on a diet where folic acid was omitted. As for the amino acids, isoleucine, leucine, phenylalanine, threonine, tryptophan, and valine, were considered to be essential. The nymphs were unable to mature and they died when fed on diets in which any one of these essential amino acids was omitted. The growth of nymphs was slightly delayed when any one of the following amino acids, lysine, methionine, and serine was omitted from the diets. Although no significant effects were observed on the growth of nymphs fed on diets in which one of the other vitamins or amino acids mentioned above was omitted, further investigations are required to confirm the present results by using holidic diets.The body weight of newly emerged adults fed on a diet lacking in one of the vitamins or amino acids was not significantly different from the weight of those fed on the control diet containing all the vitamins and amino acids.View full abstractDownload PDF (554K) -
Iwao ISHIKAWA, Akio SHIMAMURA, Hitoshi WATANABE1983 Volume 27 Issue 4 Pages 300-303
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSA previously undescribed entomopoxvirus was isolated from the diseased larvae of the smaller tea tortrix, Adoxophyes sp., collected in tea gardens in Miyazaki Prefecture. The infected larvae showed external symptoms consisting of the whitening and swelling of the intersegmental membrane. Death occurred 24-32 days after infection. Oval inclusion bodies averaging 6.0×3.5μm were observed in the cytoplasm of cells of the fat body, midgut, muscle, and in blood cells of the diseased larvae, but not in the trachea, hypodermis, and silk gland cells. The oval virions with a beaded surface measured about 290×240nm, packing the inclusion bodies along with crystalline spindles of about 300×240nm in size. The entomopoxvirus found in the smaller tea tortrix was also infectious to other tortricid larvae such as Adoxaphyes orana fasciata, Archippus breviplicanus, Archips fuscocupreanus, and Homona magnanima, but not to Pandemis heparana and Epinotia ancyrota.View full abstractDownload PDF (1914K) -
Hitoshi KAWADA, Chikayoshi KITAMURA1983 Volume 27 Issue 4 Pages 304-306
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (329K) -
Tsutomu SAITO, Fumitaka IKEDA1983 Volume 27 Issue 4 Pages 307-308
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
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Ryoji KORENAGA1983 Volume 27 Issue 4 Pages 308-310
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (402K) -
Masahiko KUWAHARA1983 Volume 27 Issue 4 Pages 310-312
Published: November 25, 1983
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (365K)
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