• Title/Summary/Keyword: pupal stage

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Diapause-associated transcription of Dopa decarboxylase in Bombyx mori and evolutionary relationship to other species

  • Hwang, Jae-Sam;Kang, Seok-Woo;Goo, Tae-Won;Yun, Eun-Young;Park, Kwang-Ho;Kim, Sung-Kuk
    • Proceedings of the Korean Society of Sericultural Science Conference
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    • 2003.04a
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    • pp.49-49
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    • 2003
  • DOPA decarboxylase (DDC), which converts DOPA to dopamine, is important for many biological event such as cuticular melanization, sclerotization and neurotransmission in insects. Recently, it has been also shown that DDC activity is correlated with pupal diapause in M. brassicae. The silkworm, Bombyx mori is a typical insect diapausing at early embryonic stage. (omitted)

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Descriptions of Immature and Adult Stages of Hydropsyche orientalis Martynov(Trichoptera, Hydropsychidae) with Ecological Notes (동양줄날도래(날도래목, 줄날도래과)의 미성숙 단계와 성충 단계의 기재 및 생태 기록)

  • 허준미;원두희;노태호;배연재
    • Korean journal of applied entomology
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    • v.39 no.1
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    • pp.25-29
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    • 2000
  • Immature and adult stages of Hydropsyche orientalis Martynov, previously known as Hydropsyche KUe in Korea, were associated based on field observations and rearing experiments. Its larval instars, larval retreat, pupa, pupal case, and male and female adults were described and its ecological notes were provided.

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Electrophoretic Patterns of Hemolymph Proteins of Varieties with Long and Short Life Span in the Silkworm Bombyx mori L. (${\cdot}$단명 누에 품종의 체액단백질의 전기영동상)

  • Kang, Pil-Don;Yoon, Hyung-Joo;Ryu, Kang-Sun;Sohn, Bong-Hee;Sohn, Hung-Dae
    • Journal of Sericultural and Entomological Science
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    • v.41 no.1
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    • pp.1-8
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    • 1999
  • Hemolymph protein patterns of silkworms in terms of short and long life span were analyzed by native- and SDS-polyacrylamide gel electrophoresis (PAGE) with the developmental stages. From the native-PAGE patterns of silkworm major hemolymph proteins there were varietal differences on the first day of the pupal stage and were classified into there groups MHP-a, b and c SA 10, JAM109 and J037 were grouped into MHP-Ⅰ, Hangang, Chungmun and Daizo(sdi) into MHP-Ⅱ and NTZN, Sulak, Qoichuk and PR varieties into MHP-Ⅲ group. It was found that the MHP in each group revealed similar patterns and changes with development of pupal stage. In the first day of adult, MHP-c was clearly detected in both female and male of the Daizo(sdi), but not in the J037, indicating that there was significantly varietal differences in electrophoretical protein pattern. In addition, the results of protein pattern of hemolymph by SDS-PAGE showed also varietal differences in the concentration of hemolymph protein.

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A Note on the Deveolopment of Tribolium castaneum (Coleoptera: Tenebrionidae) on Brown Rice Oryzae sativa L. (현미에서의 거짓쌀도둑, Tribilium castaneum(딱정발레목:거저리과)의 발육)

  • 전환구;홍영석;류문일
    • Korean journal of applied entomology
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    • v.30 no.2
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    • pp.103-137
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    • 1991
  • The developmental period(mean $\pm$ SE) of the red flour beetle, Tribolium castaneum was studied on brown rice at four constant temperature(25, 28, 34, $36^{\circ}C$ $\pm$ $0.5^{\circ}C$, RH 70%)conditions. Based on the results, the lower and the upper developmental threshold temperature for the beetle were also estimated. The duration of the egg stage was estimated to be 7.6 $\pm$ 0.25, 4.8 $\pm$ 0.10, 3.0 $\pm$ 0.03 and 2.5 $\pm$ 0.09 days at 25, 28, 34, $36^{\circ}C$, respectively. That of the larval stage was estimated to be 53.3 $\pm$ 1.49, 33.4 $\pm$ 0.57, 30.6 $\pm$ 0.70, 31.0 $\pm$ 1.18; that of the pupal stage to be 12.1 $\pm$ 0.17, 7.8 $\pm$ 0.09, 5.7 $\pm$ 0.09, 5.0 $\pm$ 0.07 ; that of the overall period which spans from eggs to the adult emergence to be 72.3 $\pm$ 1.67, 46.0 $\pm$ 0.55, 39.4 $\pm$ 0.64, 38.7 $\pm$ 1.15 days at 25, 28, 34, $36^{\circ}C$, respectively. The duration of the egg and the pupal stage were similar to those of the results reared on other diets such as wheat and maize. Fed on brown rice, however, the duration of the larval stage was significantly retarded than on wheat. The mortality of the beetle during ,development was higher on brown rice than on wheat reported, indicating that brown rice is a poor diet compared with wheat. The lower developmental threshold temperature was estimated to be $20.0^{\circ}C$ for all stages of the beetle. The upper one was estimated to be $40.2^{\circ}C$ for the overall stage. The modal value of the moulting times during the larval stage was 7. However, as temperature increased,.the frequency of the beetle that moulted more than 7 times became higher. The sex ratio of the beetle was not affected by temperature.

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Diapause-initiation Stage and Changes in Proteins of the Fall Webworm (Hyphantria cunea Drury) Pupae (흰불나방의 용휴면이 결정되는 시기와 용 체내단백질의 변화)

  • 박노중;부경쟁
    • Korean journal of applied entomology
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    • v.27 no.1
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    • pp.6-13
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    • 1988
  • Studies were carried out to investigate the diapause-sensitive stage, the effect of 20-hydroxye- cdysone on diapausing pupae and the changes in pupal proteins of the fitll webworm, HYPha¬ntria cunea Drury. The stage sensitive to diapause-inducing photoperiod lies between 5th and 15th day of the larval development. And the oxygen consumption rate of diapausebound pupae decreased to a mean level of $30mu$l $O_{2}$/g/hr. The 20-hydroxyecdysone was effective in raising the respiratory acivity of 2.5% homogenate of the diapausing fall webworm pupae and in causing a normal adult development of the diapause-bound pupae. The soluble protein content rapidly declined in normally-developing pupae, but in diapause-bound pupae it was more or less static with much higher quantity. And protein bands separated from fat body of diapause¬bound pupae were different from those of nondiapausing pupae.

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Morphology of Drosophila Ocellar Corneagenous Cells to the Development (초파리 단안의 발생시기에 따른 각막형성세포의 형태)

  • Yoon, Chun-Sik
    • Applied Microscopy
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    • v.29 no.2
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    • pp.231-239
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    • 1999
  • Morphological changes of Drosophila ocellar corneagenous cells were studied to the development with electron microscopy, and the movement of produced proteins was traced with autoradiography. Corneagenous cells of immediate postemergence showed very active secretion pattern. However, a few days after the emergence, the secretory activity of corneagenous cell was supposed to be dropped suddenly. In autoradiography, almost of proteins that produced by corneagenous cells moved toward lens. From this, it was supposed that the corneagenous cells do not function in photoreceptor cells rather in the formation of lens at the postemergence stage. Corneagenous cells of pupal stage were well developed. In the period of lens formation, rER of corneagenous cells were well developed and it suggested very active material metabolism. Granules and microtubules were also frequently observed and the later would be a pathway of the movement of materials. In conclusion, corneagenous cells were well developed at vigorous lens forming stage. After emergence, when the lens formation was completed, both the function and the size of corneagenous cells were reduced.

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Ecological Characteristic of Glyphodes perspectalis (회양목명나방(Glyphodes perspectalis)의 생태 특성)

  • Park, Il-Kwon
    • Korean journal of applied entomology
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    • v.47 no.3
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    • pp.299-301
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    • 2008
  • Ecological Characteristic of Glyphodes perspectalis was investigated in laboratory and field condition. Larvae of Glyphodes perspectalis had 6 instars, and color of head and body was black and yellowish green, respectively. Larval periods were 24 days. Egg was flat and round. Color of egg was transparent at an early stage, and became milky later. Color of pupa was yellowish green and became dark brown later. Pupal periods were 10.5 days. Adult of Glyphodes perspectalis emerged twice a year. First emergency was from early June to late June, and second from middle August to early September.

Developmental Characteristics and Life History of the Korean Native Firefly, Pyrocoelia rufa

  • Kim, Jong-Gill;Kim, Keun-Young;Park, Young-Cheol;Park, Ji-Young;Kim, Sam-Eun;Jin, Byung-Rae;Lee, Sang-Mong;Lee, Jong-Eun;Lee, Ki-Yeol
    • International Journal of Industrial Entomology and Biomaterials
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    • v.6 no.1
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    • pp.69-72
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    • 2003
  • Development and life history of the Korean native firefly, Pyrocoelia rufa, were investigated throughout the indoor rearing. Average size of egg with an oval shape was 1.7 m and the hatchability of egg of P. rufa was approximately 88.5%. The larvae were pupated at the ${5^th}$ instar and the body length of the matured larvae was 27.1 mm. The total periods of larval stage to the end of the 5$^{th}$ instar were approximately 104.7 days. Average pupal period was 10.3 days and average number of eggs oviposited by a female was 87.3 eggs. The body size of female in the pupa and adult was larger than that of male. The wings of female adult were deteriorated.

Mode of Transmission of a Newly Discovered Microsporidian and Its Effect on Fecundity and Hatching in Silkworm, Bombyx mori L.

  • Bhat Shabir Ahmad;Nataraju B.
    • International Journal of Industrial Entomology and Biomaterials
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    • v.11 no.2
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    • pp.81-86
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    • 2005
  • The mode of transmission, effect on fecundity, hatching and tissues specificity of a microsporidian $(Lb_{ms})$ recovered from Lamerin breed of the silkworm Bombyx mori L. was studied and compared with standard strain Nosema bombycis. Peroral inoculation of $Lb_{ms}$ or N. bombycis to zeroday of $4^{th}$ instar larvae of silkworm was the most suitable method for producing information on development of stage specific mortality, pupation and obtaining infected adults for transovarial transmission studies. It was observed that pupal mortality, the percentage of moths emerged and the percentage of moths infected were significantly high in N. bombycis infected batches as compared $(Lb_{ms})$ in all the three tested breeds of the silkworm. However no significant difference was observed in larval mortality. The fecundity and hatchability was not affected significantly in $(Lb_{ms})$ infected adults, however significant reduction in egg production, fecundity, hatchability and increased egg retention was observed in mother moths infected with N. bombycis. The $(Lb_{ms})$ is transmitted both horizontally and vertically at lower rate due to its low rate of proliferation. The trans ovarial transmission of $(Lb_{ms})$ to the $F_1$ progeny generation through eggs averaged only $61.33\pm5.10\%$ whereas N. bombycis was transmitted at $100\%$. The $(Lb_{ms})$ had low oral infectivity and low transovarial transmission in silkworm B. mori.