Kyushu Plant Protection Research
Online ISSN : 1884-0035
Print ISSN : 0385-6410
ISSN-L : 0385-6410
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Displaying 1-13 of 13 articles from this issue
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Contents of original papers
Diseases
Insect pest
  • Evaluation of grease, an industrial machinery lubricant, as an alternative to ant repellants for invasive fruit flies surveillance traps
    Misaki Kusumoto, Atsushi Honma, Chihiro Himuro, Masahiro Taniguchi
    Article type: research-article
    2022 Volume 68 Pages 56-62
    Published: November 28, 2022
    Released on J-STAGE: January 01, 2024
    DOIhttps://doi.org/10.4241/kyubyochu.68.56
    JOURNAL FREE ACCESS
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    Predation of insects attracted by surveillance traps inhibits accurate evaluation of invasive pests. Prevention of intrusion into the traps by ants is very important because they can carry away the whole insect body, the evidence of the pest existence. Since the production of Tree Tanglefoot Insect Barrier® tube （Tangle） used as an ant repellent in Okinawa has been discontinued, we evaluated the effectiveness of a lubricant grease （Sumiplex MP, No. 0; Grease）, used for industrial machinery, as an alternative ant repellent to Tangle. We placed frozen-dead melon flies, Zeugodacus cucurbitae, in traps set in the field and collected them two weeks later to evaluate predatory damage. The results showed Grease was as effective or even more effective as Tangle as an ant repellent. No significant difference in damage rate per fly was observed between the materials. In addition, with regard to disappearance damage, traps with Grease were slightly but significantly less damaging than traps with Tangle, in which the fly body was completely carried away. Furthermore, we compared Grease with Tangle with regard to ease of handling and outdoor durability and concluded Grease is an effective alternative material.
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  • Root-knot nematode species in Oita Prefecture and occurrence of resistance-breaking nematode populations on tomato
    Tomonori Suzuki, Ritsuko Fukumoto, Syuichi Yamasaki
    Article type: research-article
    2022 Volume 68 Pages 63-67
    Published: November 28, 2022
    Released on J-STAGE: January 01, 2024
    DOIhttps://doi.org/10.4241/kyubyochu.68.63
    JOURNAL FREE ACCESS
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    Species of root-knot nematodes （RKNs） from 19 fields were surveyed in Oita Prefecture, Japan. Four to 106 second-stage juveniles or female adults were collected from field soil samples and RKN species were identified individually by PCR-RFLP method. As a result, thirteen RKN populations were Meloidogyne incognita, three were M. arenaria, one was M. microcephala, one was a mixed population of M. incognita and M. hapla, and one was a mixed population of M. incognita and M. arenaria. Populations of M. incognita obtained from three tomato fields infected a RKN-resistant tomato variety.
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  • Effects of the Australian fan flower, Scaevola aemula R.Br. on survival and fecundity of Amblyseius swirskii Athias-Henriot
    Yukari Yoshimura, Takeshi Teramoto
    Article type: research-article
    2022 Volume 68 Pages 68-74
    Published: November 28, 2022
    Released on J-STAGE: January 01, 2024
    DOIhttps://doi.org/10.4241/kyubyochu.68.68
    JOURNAL FREE ACCESS
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    Thrips tabaci Lindeman （Thysanoptera: Thripidae） is a major pest of green asparagus, while few insecticides are registered for asparagus thrips. Recently, therefore, augmentative biological control with Amblyseius swirskii has been used widely for vegetable crops. However, the predatory mite populations could not persist unless no or few prey are available, although early release of the predator is essential for good control of the pest. In this study, I evaluated Scaevola aemula as an alternative food source in terms of survival and fecundity of adult A. swirskii to develop biological control-based IPM. Female mites provided with pine pollen or Scaevola flowers had significantly increased longevity and fecundity compared to those provided with water alone, Scaevola leaves, or asparagus leaves. On potted Scaevola plants, A. swirskii population increased during the 20 day experiment period after release. Present results suggested that Scaevola plants with flowers allow the predatory mite populations to reproduce when prey thrips are absent or few, leading to early colonizing before thrips occur.
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  • Lethal and field control efficacy of two spiracle blocking insecticides with orientation and mating disruption effects against the Sweet Potato Whitefly, Bemisia tabaci
    Harui Itami, Kanako Uemura, Nobutaka Shimizu
    Article type: research-article
    2022 Volume 68 Pages 75-82
    Published: November 28, 2022
    Released on J-STAGE: January 01, 2024
    DOIhttps://doi.org/10.4241/kyubyochu.68.75
    JOURNAL FREE ACCESS
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    The insecticidal efficacy of two spiracle-blocking insecticides, safflower and cotton oils and decanyloctanoylgycerol, on eggs and fourth instar nymphs of the Bemisia tabaci was evaluated in the laboratory. In addition, their density suppression effects in the field were also examined. In the laboratory, safflower and cotton oils and decanyloctanoylglycerol showed higher efficacy against B. tabaci eggs and fourth instar nymphs than the control, with more than 70% mortality observed in both developmental stages. In the field, three consecutive applications of acetylated glyceride or either of the spiracle-blocking insecticides at 7-day intervals suppressed the number of fourth instar nymphs and adults.
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