Yutaka Iwamoto

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Eighty-five Pyricularia isolates were collected from 29 host species of Gramineae, Bambusideae and Zingiberaceae plants sampled in Brazil, Uganda, Ivory Coast, India, Nepal, China, Indonesia and Japan. These isolates were compared on the basis of pathogenicity, mating ability and restriction fragment length polymorphisms with single-copy DNA probes. Based(More)
A strategy and some practical examples are proposed to enhance functionally an application gateway located between clients and some kinds of servers and to utilize it for multiple purposes in order to take advantages on some Web services and communication and/or computation between clients and servers. In such an enhanced application gateway, some suitable(More)
The suppressive potentials of Bacillus and Paenibacillus strains isolated from the tomato phyllosphere were investigated to obtain new biocontrol candidates against Fusarium crown and root rot of tomato. The suppressive activities of 20 bacterial strains belonging to these genera were examined using seedlings and potted tomato plants, and two Paenibacillus(More)
We constructed a widely and continuously tunable terahertz frequency synthesizer traceable to a hydrogen maser linked to coordinated universal time. Photomixing of two optical frequency synthesizers, linked to the hydrogen maser via dual optical frequency combs, gave this THz synthesizer frequency uncertainty of 10⁻¹². To demonstrate the potential of wide(More)
We designed specific primers for Coniothyrium minitans, a sclerotia-parasitizing biocontrol agent (BCA), and quantified its biomass in the field by quantitative polymerase chain reaction. Because chemical properties of the soil can decrease the DNA extraction efficiency and DNA polymerase activity, standard curves were calibrated by adding known(More)
Lettuce big-vein disease, caused by Mirafiori lettuce big-vein virus and Lettuce big-vein associated virus, is suppressed when the pH of field soil becomes acidic. Therefore, we evaluated the effect of soil pH on the activities of Olpidium virulentus, the vector of the viruses. We found that acidic soil, pH less than 6.0, significantly reduced O. virulentus(More)
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