ツマグロヨコバイの吸汁害に関する研究(3) : 穂吸汁加害によるイネの生理的反応

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  • Studies on direct feeding damage due to the green rice leafhopper, Nephotettix cincticeps UHLER, to rice plants. 3. Physiological response of rice plants to infestation of panicles.
  • ツマグロヨコバイの吸汁害に関する研究　ＩＩＩ　　穂吸汁加害によるイネの生理的反応
  • ツマグロヨコバイ ノ キュウジュウ ガイ ニ カンスル ケンキュウ 3 スイキ
  • 3. Physiological Response of Rice Plants to Infestation of Panicles
  • III. 穂吸汁加害によるイネの生理的反応

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The green rice leafhoppers (GRL) feeding on panicles of rice plants inserted their stylets much more pregnantly on the rachis-branch and the rachis which represent the initial pathway of water and photosynthetic products than on the chaff and glume. The translocation of water and photosynthetic products to panicles was prevented by sap-sucking of GRL. The physiological response of rice plants injured by GRL differed depending on the pattern of ripening of the plants. In the early-maturing varieties, the yield was markedly reduced due to the delay of ripening. In contrast, even a severe infestation inflicted minimal yield losses in the medium-maturing varieties, due to the compensation of the loss of photosynthetic products subsequently. Therefore, the control threshold should be established for each rice variety in taking account of the physiological response of the variety to GRL's infestation in the ripening period.

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