A Practical Estimating Method of the Dose-Response Curve between Inoculum Density of Plasmodiophora brassicae and the Disease Severity for Long-term IPM Strategies
スポンサーリンク
概要
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A model was developed to evaluate long-term temporal changes in disease severity (DS) of the clubroot disease of Chinese cabbage in the field with various management strategies. The model consists of a dose-response curve (DRC) of resting spore (RS) density of <I>Plasmodiophora brassicae</I> and DS, and the rate of RS density change due to leafy daikon cropping as a decoy plant, plowing the clubbed roots in the soil after harvest, and natural reduction. The DRC was estimated by greenhouse experiments. Three DRCs were estimated by experiments carried out in 1995-1997. The DRC in 1996 predicted the highest DS at all RS densities and hence was considered to represent a conducive condition, and that in 1997 predicted the lowest DS and was considered to represent a suppressive condition, respectively. Field data for three years (1996-1998) fell into an area surrounded by both DRC. This result confirmed the validity of the DRCs. Also the model was validated by field experiments where leafy daikon was cultivated before planting Chinese cabbage. The usefulness of the model for long-term prediction of temporal changes of DS was discussed.
著者
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MURAKAMI Hiroharu
Department of Integrated Agricultural Research, Tohoku National Agricultural Experiment Station
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TSUSHIMA Seiya
Department of Integrated Agricultural Research, Tohoku National Agricultural Experiment Station
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AKIMOTO Takayuki
Department of Integrated Agricultural Research, Tohoku National Agricultural Experiment Station
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Shishido Yoshihiro
Department Of Agronomy Faculty Of Agriculture Tohoku University
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KUROYANAGI Yukiko
Department of Integrated Research for Agriculture, National Agricultural Research Center for Tohoku Region, National Agriculture and Food Research Organization (NARO)
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SHISHIDO Yoshihiro
Department of Integrated Research for Agriculture, National Agricultural Research Center for Tohoku Region, National Agriculture and Food Research Organization (NARO)
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KATAHIRA Mitsuhiko
Department of Integrated Research for Agriculture, National Agricultural Research Center for Tohoku Region, National Agriculture and Food Research Organization (NARO)
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AKIMOTO Takayuki
Department of Integrated Research for Agriculture, National Agricultural Research Center for Tohoku Region, National Agriculture and Food Research Organization (NARO)
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TSUSHIMA Seiya
Department of Integrated Research for Agriculture, National Agricultural Research Center for Tohoku Region, National Agriculture and Food Research Organization (NARO)
関連論文
- Studies on Translocation and Distribution of Photosynthetic Assimilates in Tomato Plants IV. Retranslocation of ^C-assimilates once Translocated into the Roots
- Reduction of Spore Density of Plasmodiophora brassicae in Soil by Decoy Plants
- Studies on Translocation and Distribution of Photosynthetic Assimilates in Tomato Plants III. Distribution Pattern as Affected by Air and Root Temperatures in the Night
- Studies on Translocation and Distribution of Photosynthetic Assimilates in Tomato Plants II. Distribution Pattern as Affected by Phyllotaxis
- Studies on Translocation and Distribution of Photosynthetic Assimilates in Tomato Plants I. Effects of Feeding Time and Night Temperature on the Translocation and Distribution of ^C-assimilates
- A Practical Estimating Method of the Dose-Response Curve between Inoculum Density of Plasmodiophora brassicae and the Disease Severity for Long-term IPM Strategies