Abstract
Abstract pp. 891–896 In order to elucidate the effect of converter furnace slag applied as a liming amendment and continuous cropping of Qing gin cai (Brassicae chinensis L.) or leaf daikon (Raphanus sativus) on the incidence of clubroot disease and the resting spore density in soil, pot cultivation tests were carried out. In the pot tests, pH(H2O) was 5.2–6.1 in the non-application pot, and 7.1–7.6 in the pots receiving an application of converter furnace slag. A significant incidence of club-root disease was apparent in the non-application pots of Qing gin cai. The resting spore density in the soils decreased soon after harvesting, but then increased after mixing the infected roots and soils. On the other hand, the incidence of the disease was suppressed significantly, in application pots of continuously cropped Qing gin cai. Furthermore, the resting spore density in these soils decreased with repeated cultivation. These results agreed well with the results from field cultivation tests that the authors have already reported. Macfarlane has reported that the suppression mechanism of clubroot disease brought about by the amelioration of soil acidity is effected through the inhibition of resting spore germination. In this study, the decrease of resting spores density was associated with the cultivation of Qing gin cai under conditions of high soil pH. From these results, it is concluded that the suppression mechanism is caused by some phenomenon that occurs after the primary zoospore is infected with the root hair. Until now, avoidance of continuous cropping of susceptible cruciferous vegetables was promoted as one of the most fundamental countermeasures for the control of clubroot disease. However, continuous cropping of suceptible cruciferous vegetables will be a useful technique to decrease resting density specifically under conditions of high soil pH. Key words: amelioration of soil acidityclubroot diseaseconverter furnace slagdecoy plantsdensity of resting spore
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Claims 9
Claim · model-written summary
A significant clubroot incidence was found in non-application pots of Qing gin cai.
Verbatim
e1“A significant incidence of club-root disease was apparent in the non-application pots of Qing gin cai”
Claim · model-written summary
Converter furnace slag application significantly suppressed clubroot incidence in continuously cropped Qing gin cai.
- Taxon
- Qing gin caie1
- Treatment
- converter furnace slage2
- Outcome
- incidence of the diseasee1
- Direction
- suppressede1
- Qualifier
- continuously croppede1
Not reportedComparator
Verbatim
e1“On the other hand, the incidence of the disease was suppressed significantly, in application pots of continuously cropped Qing gin cai”
e2“In order to elucidate the effect of converter furnace slag applied as a liming amendment and continuous cropping of Qing gin cai (Brassicae chinensis L.) or leaf daikon (Raphanus sativus) on the incidence of clubroot disease and the resting spore density in soil, pot cultivation tests were carried out”
Claim · model-written summary
Resting spore density in the soils decreased soon after harvesting.
Verbatim
e1“The resting spore density in the soils decreased soon after harvesting, but then increased after mixing the infected roots and soils”
e2“In order to elucidate the effect of converter furnace slag applied as a liming amendment and continuous cropping of Qing gin cai (Brassicae chinensis L.) or leaf daikon (Raphanus sativus) on the incidence of clubroot disease and the resting spore density in soil, pot cultivation tests were carried out”
Claim · model-written summary
Resting spore density in the soils increased after mixing infected roots and soils.
Verbatim
e1“The resting spore density in the soils decreased soon after harvesting, but then increased after mixing the infected roots and soils”
e2“In order to elucidate the effect of converter furnace slag applied as a liming amendment and continuous cropping of Qing gin cai (Brassicae chinensis L.) or leaf daikon (Raphanus sativus) on the incidence of clubroot disease and the resting spore density in soil, pot cultivation tests were carried out”
Claim · model-written summary
Resting spore density in these soils decreased with repeated cultivation of Qing gin cai.
Verbatim
e1“Furthermore, the resting spore density in these soils decreased with repeated cultivation”
e2“In order to elucidate the effect of converter furnace slag applied as a liming amendment and continuous cropping of Qing gin cai (Brassicae chinensis L.) or leaf daikon (Raphanus sativus) on the incidence of clubroot disease and the resting spore density in soil, pot cultivation tests were carried out”
Claim · model-written summary
Decrease in resting spores density was associated with cultivation of Qing gin cai under high soil pH.
Verbatim
e1“In this study, the decrease of resting spores density was associated with the cultivation of Qing gin cai under conditions of high soil pH”
Claim · model-written summary
The clubroot suppression mechanism is thought to act after the primary zoospore infects the root hair.
Verbatim
e1“From these results, it is concluded that the suppression mechanism is caused by some phenomenon that occurs after the primary zoospore is infected with the root hair”
e2“In order to elucidate the effect of converter furnace slag applied as a liming amendment and continuous cropping of Qing gin cai (Brassicae chinensis L.) or leaf daikon (Raphanus sativus) on the incidence of clubroot disease and the resting spore density in soil, pot cultivation tests were carried out”
Claim · model-written summary
Continuous cropping of susceptible cruciferous vegetables is a useful technique to decrease resting density under high soil pH.
Verbatim
e1“However, continuous cropping of suceptible cruciferous vegetables will be a useful technique to decrease resting density specifically under conditions of high soil pH”
Claim · model-written summary
Converter furnace slag raised soil pH(H2O) to 7.1–7.6 compared with 5.2–6.1 in non-application pots.
Verbatim
e1“pH(H2O) was 5.2–6.1 in the non-application pot, and 7.1–7.6 in the pots receiving an application of converter furnace slag”
e2“In order to elucidate the effect of converter furnace slag applied as a liming amendment and continuous cropping of Qing gin cai (Brassicae chinensis L.) or leaf daikon (Raphanus sativus) on the incidence of clubroot disease and the resting spore density in soil, pot cultivation tests were carried out”