Japanese Journal of Applied Entomology and Zoology
Online ISSN : 1347-6068
Print ISSN : 0021-4914
ISSN-L : 0021-4914
Search
Advanced search
OR
Browse
Search
Volume 45, Issue 3
Displaying 1-8 of 8 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Regular Papers
  • Method for Production of Paecilomyces tenuipes Utilizing the Naked-Pupa Mutant Silkworm
    Ji Young Choi, Sam Eun Kim, Joo Hong Yeo, Sung Hee Nam, Jong Gill Kim, ...
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 3 Pages 111-116
    Published: 2001
    Released on J-STAGE: March 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.111
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    To shorten the labor cost for the production of the fungus, Paecilomyces tenuipes, the use of uncocooning mutant silkworm as a host was examined. The strain Nd was selected as the best for the production of P. tenuipes among five strains (Nd, NdH, p3Nd, Nd-s and Nd-t). Nd yielded the highest pupation rate of 95%, naked pupation rate of 99% and pupal weight of 1.4 g/individual. The optimum time for the infection of P. tenuipes was 12 h at 28.5°C and 95% R.H., when 108 conidia/ml of P. tenuipes were sprayed on the surface of the silkworms. The yield of P. tenuipes was reduced when Nd was used as a host because Nd was smaller than the hybrid Baegokjam that has been used as a typical host. To increase the host weight, Nd was crossed with Jam123 or Jam124, and resulted in not only greater weights (>1.2×) but also higher yield (>1.5×) of P. tenuipes.
    View full abstract
    Download PDF (67K)
  • Artificial Diets for the Alfalfa Weevil, Hypera postica
    Bingxing Wei, Hironori Sakurai, Koji Tsuchida
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 3 Pages 117-121
    Published: 2001
    Released on J-STAGE: March 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.117
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Development of artificial diets was studied for larvae and adults of the alfalfa weevil, Hypera postica Gyllenhal. The artificial diets for larvae and adults were used for 3–4 days without replacement, and preserved 2 months without decay at 4°C. The rate of adult emergence reached 14.6% on the larval diet, but was significantly lower than that of control diet (fresh alfalfa leaf). The adults fed actively and oviposited well on the adult diet with no significant difference in the number of eggs deposited and their hatchability between females on artificial and control diets. We successfully reared through two generations with the artificial diets for larvae and adults.
    View full abstract
    Download PDF (50K)
  • Ecological Notes on Diapause and Overwintering of the Allium Leafminer, Acrolepiopsis sapporensis (Matsumura) (Lepidoptera: Plutellidae) in Northern Japan
    Reishi Ohtomo, Takekatsu Chiba
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 3 Pages 123-128
    Published: 2001
    Released on J-STAGE: March 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.123
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Diapause features were investigated in adults of the allium leafminer, Acrolepiopsis sapporensis (Matsumura). Ovaries did not develop at all under conditions of 16 h light/8 h dark at 25°C in adult females of the last generation in A. sapporensis. This suggests that A. sapporensis enters diapause in the adult stage. In addition, we examined overwintering of A. sapporensis. Adults survived for 129 days at low temperature (0°C), and the cold hardiness of A. sapporensis was higher than that of the diamondback moth, Plutella xylostella (L.). Some adults of A. sapporensis also survived to the end of March under outdoor conditions. These results indicate that A. sapporensis may overwinter during the adult stage in northern Japan.
    View full abstract
    Download PDF (112K)
  • Insecticidal Activity of a Trehalase Inhibitor, Validoxylamine A, against the Green Peach Aphid, Myzus persicae
    Norichika Moriwaki, Toshihide Nishimori, Yuzo Mori, Yoshiaki Kono
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 3 Pages 129-135
    Published: 2001
    Released on J-STAGE: March 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.129
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    We investigated the insecticidal activity of a trehalase inhibitor, validoxylamine A (VAA), against insecticide susceptible (S) and resistant (R) strains of the green peach aphid, Myzus persicae. Four methods, leaf dipping method, two methods to determine the systemic activity using plants with roots (root soaking) and without roots (stalk-tip soaking), and parafilm method, which allows the aphids to suck artificial diet solution containing VAA through the parafilm membrane, were adopted for the tests. Mortality of first instar nymphs 2 d after treatment by leaf dipping method with 100 ppm VAA was about 10% in both S and R strains. The stalk-tip soaking method, however, showed strong effects of 100% and 88.5% against S and R strains, respectively, at 100 ppm VAA. At 20 ppm VAA in the root soaking method, 57.4% (S) and 49.9% (R) of female adults were dead within 7 d. The production of nymphs by the treated female was strongly suppressed. By the parafilm method, 20 ppm VAA caused complete mortality in female adults within 5 d. These results suggest that concentrations of VAA at the sucking site of the aphid was lower than that around the root where treatment occurred. For practical usage of these chemicals as insecticides, chemical modification is needed to improve the systemic characteristics.
    View full abstract
    Download PDF (82K)
  • Further Studies on Mating Disruptants for the Summerfruit Tortrix Moth, Adoxophyes orana fasciata
    Kazuhiro Okazaki, Akihiro Arakawa, Hiroshi Noguchi, Fumiaki Mochizuki
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 3 Pages 137-141
    Published: 2001
    Released on J-STAGE: March 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.137
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Mating disruption by two disruptants was compared Adoxophyes orana fasciata by field tests. A binary mixture of (Z)-11-tetradecenyl acetate (Z11-14:Ac) and (Z)-9-tetradecenyl acetate (Z9-14:Ac) indicated high trap shutdown and a higher level of control than the single compound of Z11-14:Ac. It is necessary to control both A. orana fasciata and Archips breviplicanus, therefore the mixture of Z11-14:Ac plus 20% Z9-14:Ac is the best mating disruptant. Following success of mating disruption of A. orana fasciata with this new mixture will lead to further decrease in the need for pesticides.
    View full abstract
    Download PDF (60K)
  • Forecasting the Population Density of Two Stink Bugs, Plautia crossota stali Scott and Glaucias subpunctatus (Walker) (Heteroptera: Pentatomidae), by Using Airborne Pollen Counts of Sugi (Cryptomerica japonica)
    Masahiko Morishita, Tadao Enomoto, Hideo Komatsu, Kazuaki Naka, Hiroka ...
    Article type: Regular Paper
    Subject area: [not specified]
    2001 Volume 45 Issue 3 Pages 143-148
    Published: 2001
    Released on J-STAGE: March 25, 2003
    DOIhttps://doi.org/10.1303/jjaez.2001.143
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The density of overwintering Plautia crossota stali Scott in fallen leaves changed similarly in seven districts of Wakayama Prefecture, showing a remarkable peak in 1996. There was a highly positive correlation between the number of airborne pollen of sugi (Cryptomerica japonica D. Don) and the density of P. crossota stali overwintering in fallen leaves. There also was a highly positive correlation between the number of airborne sugi pollen and the number of light trap catches of P. crossota stali and Glaucias subpunctatus (Walker) in April–July of the following year. Since the overwintering density of the two stink bugs seemed to depend on the number of airborne sugi pollen, which is closely related to cone production, the number of airborne pollen is considered to be a useful index for forecasting the population densities of these two stink bugs in the following spring-summer season.
    View full abstract
    Download PDF (84K)
Notes
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top