水稲ケイ酸と害虫

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  • 笹本 馨
    山梨大学学芸学部応用昆虫学研究室

書誌事項

タイトル別名
  • Studies on the Relation between the Silica Content in the Rice Plant and Insect Pests
  • スイトウ ケイサン ト ガイチュウ 7
  • VII. Effects of Water Glass and Slag on the Damage of Rice Plant Caused by the Rice Stem Borer
  • VII. 水ガラス・鉱さい施用水稲に対するニカメイチュウの加害と摂食行動

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In the previous papers I have reported that the injury of the rice plant caused by the rice stem borer (Chiro suppressalis WALKER) was reduced when the slag was supplied in the soil. However, the slag used contained several available elements such as Ca, Fe, Mg, Al and Na in addition to Si.<br>In the present experiment, the silica gel prepared from Na2SiO3 by the treatment with HCl was used as a silica source to check the effects of the elements included in the slag on the rice plant. The results obtained were as follows, and almost agreed with the previous studies.<br>1. The silica content in the rice plant was increased by supplying the silica gel.<br>2. The mandibles of the larvae fed on the silicated rice plant remarkably diminished. It seems that the rice plant stem hardened by absorption of the silica.<br>3. The larvae prefered the rice plant stem cultured in the control plot to that in the soil supplied silica.<br>The remarkable preference was also observed for alcohol or ether extract of the rice plant stems cultured in control plot.

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