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Volume 20 (1976)
- Issue 4 Pages 173-
- Issue 3 Pages 125-
- Issue 2 Pages 51-
- Issue 1 Pages 1-
Volume 20, Issue 3
Displaying 1-9 of 9 articles from this issue
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Yutaka ARAI, Yutaka AKIYAMA1976 Volume 20 Issue 3 Pages 125-128
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe number of moths captured by light traps peaked in spring, summer, and early autumn. A part of the second generation which had reached the 4th instar by the early August emerged as adults in the early autumn, while the remaining part overwintered as pupae. The larvae of the third generation appeared from September to November in the mulberry field. Most larvae of the third generation completed their development, and overwintered as pupae.View full abstractDownload PDF (485K) -
Ecological Study on the Occurrence of the Yellow-spotted Longihorn Beetle (Psacothea hilaris PASCOE)I. Effects of Temperature and Photoperiodic Conditions on their DevelopmentTakashi EMORI1976 Volume 20 Issue 3 Pages 129-132
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe larvae of the yellow-spotted longihorn beetles obtained as Tsukui in Kanazawa pref. were reared aseptically on an artificial diet under varied temperatures and photoperiodic conditions. The larvae rapidly developed at 30°C and reached the last instar in 40 days after hatching, regardless the long day (16hr light and 8hr dark) or shoft day (8hr light and 16hr dark) treatments. In 25°C rearing, the larvae treated by the long day condition became the adults in 50 to 150 days after hatching. On the other hand, they took 270 to 370 days under the short day treatment. In 20°C rearing the adults emerged scatteringly during 100 to 290 days under long day and during 200 to 300 days under short day. The larval period in 15°C rearing was the longest of all temperature rearings and thus it took 250 to 350 days from hatching to emergence in either long day or short day treatment. The pupal period became longer gradually as the temperature was lowered and under short day than under long day. The body length and weight of the adult under short day were longer and heavier than those under long day.View full abstractDownload PDF (1369K) -
Toshihiko FUJIMURA1976 Volume 20 Issue 3 Pages 133-138
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe mating behavior and sex attractant of the spotted cutworm moth, Amathes c-nigrum L. were investigated. Virgin females released sex pheromone at 5-8.5 hours after sunset, and mating response of unmated males occurred at 4.5-8.5 hours after sunset. The maximum peak of mating appeared just at midnight. Age of moths was an important factor for their successful mating; the maximum mating rates were recorded with 2- to 3-day-old moths. The virgin female moth releasing sex pheromone did not halt at one position. Instead, she walked on the ground in long distance without vibrating her wings as in “calling position”. An active male moth walked on the path of a female moth without performing his “mating dance”. These behaviors were peculiar to A. c-nigrum L. With ten virgin females in a trap the same number of unmated males were trapped per night in the field. Crude extracts of the abdominal tips of virgin females in methylene chloride also attracted males in the field. Synthetic cis-7-tetradecen-1-ol acetate attracted males in the field, but trans-isomer did not. Black light traps baited with virgin females or synthetic cis-7-tetradecen-1-ol acetate attracted and captured about twice as many males as the numbers caught by unbaited black light traps.View full abstractDownload PDF (1922K) -
Keizo HAYASHIYA, Yuko UCHIDA, Jun NISHIDA1976 Volume 20 Issue 3 Pages 139-143
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSAccording to our previous in vitro experiments, light was indispensable to the formation of RFP, which is present in the digestive juice of silkworm larvae. In this report, the influence of light on the RFP levels in the living larvae has been examined by rearing them under either light or dark condition, and comparing the RFP contents in their digestive juice. The RFP was not produced in darkness. In accordance to the fact that the RFP has the anti-viral activity, the larvae reared in light was found to be less susceptible against the orally administered NPV virus than those reared in darkness.View full abstractDownload PDF (605K) -
Mitsuaki SHIMAZU1976 Volume 20 Issue 3 Pages 144-150
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSAn entomophthoraceous fungus was isolated as the pathogen of the epizootic of the brown planthopper, Nilaparvata lugens, which occurred in Chikugo, Kyushu Island of Japan in autumn of 1975, and its morphological and cultural characters were studied. The conidiophores were branched or sometimes simple, the cystidia slender and the conidia elliptical to ovoid with a slight papillate base, containing one or numerous oil globules, and measured 32.7×14.8μ (collected from hosts) or 30.2×15.5μ (collected from cultures). Rhizoids and resting spores were not observed. The optimum temperature and pH value for cultivation on Sabouraud's medium were 25°C and pH 6.3 to 6.7. The conidial formation on Sabouraud's agar+pupal extract and the hyphal growth on Sabouraud's agar+egg yolk were better than those on Sabouraud's agar only. This fungus was identified as Entomophthora delphacis HORI; this was resembled to E. aphidis and E. dipterigena but distinguishable by the characters grown on the artificial media and by their host ranges.View full abstractDownload PDF (2896K) -
Mitsuo OYAMA, Sadao WAKAMURA1976 Volume 20 Issue 3 Pages 151-156
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSTraps baited with litlure, the synthetic sex pheromone of Spodoptera litura, were used to determine the flight activity of the males. The marked males were released at the center of two concentric circles with 1-km and 5-km radii. They were recaptured in 16 sex pheromone traps which had been placed on the circumferences of the two circles. Into the traps at 5-km distance, the marked males were captured from late in May to late in July, but the capture rate in July was lower than that in May. No marked male was captured from late in September to early in October. On the contrary, the capture of wild males extremely increased in later seasons. The traps at 1-km distance captured the marked males in all seasons, but the capture rate decreased with increase of the wild population. It was concluded that (1) S. litura males can fly over more than 5-km distance a night, and (2) they are attracted to and mate with wild females before they reach the traps when the wild female were more densely populated. The number of males captured in the traps decreased as the temperature dropped below 20°C, but was not affected by wind when its velocity was less than 2.0m/sec.View full abstractDownload PDF (734K) -
Masami TAKAGI1976 Volume 20 Issue 3 Pages 157-163
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSThe ecological aspects of Pteromalus puparum (LINNÉ), a pupal parasite of Papilio xuthus LINNÉ, were studied in the field and in the laboratory. The field investigations on seasonal prevalence of the hosts and parasites were made at a citrus grove in Fukuoka in 1972 and 1974. Host pupation occurred from May to November each year and the parasite attacked the host during this period. Host density increased rapidly in and after mid-August. The parasite acted as a delayed density-dependent mortality factor on the host and thus a high parasitism occurred in mid-September. Thereafter the percentage of parasitism sharply decreased as host mortality due to other natural enemies increased. An unfed female parasite, which is a synovigenic species, produced an average of 189.3 progeny, with a maximum of 311, at 25°C. The female adults provided with honey in a screen lived about one month in August and September, and longer than three months in October and November. The developmental zero of the parasite was 12.2°C and the total effective temperature was 213.7 degree-days. The biological characteristics of the parasite mentioned above are discussed in relation to the effectiveness of the parasites as a natural enemy.View full abstractDownload PDF (888K) -
VII. Seasonal changes of the sex ratio and the eggs number in the female body of adult chafers; especially of the light trap population and the food plant populationJojiro NISHIGAKI1976 Volume 20 Issue 3 Pages 164-166
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (346K) -
Y. MIYAHARA1976 Volume 20 Issue 3 Pages 166-168
Published: September 25, 1976
Released on J-STAGE: February 12, 2009
JOURNAL FREE ACCESSDownload PDF (293K)
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