Ill-Effects of Rice Dwarf Virus upon Its Vector, Nephotettix cincticeps UHLER (Hemiptera : Deltocephalidae), and Its Significance for Changes in Relative Abundance of Infected Individuals among Vector Populations

  • NAKASUJI Fusao
    Division of Entomology, Prefectural Institute of Agricultural and Forest Science
  • KIRITANI Keizi
    Division of Entomology, Prefectural Institute of Agricultural and Forest Science

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説明

The deleterious effects of the rice dwarf virus upon its vector Nephotettix cincticeps, were studied as a factor affecting inter-generation changes in the percentage of the infected individuals in a vector population. Developmental period and survival rate of nymphs, longevity of adults, and preoviposition period and fecundity of female adults were compared between infected and non-infected insects reared in isolation under various temperatures. Inter-generation changes in percentage of infected females in experimental populations were also examined at 20℃, 25℃ and 30℃. Virulency of insects was tested by using the rice seedling as a test plant or by the serological method. The virus was harmful to the vector with respect to all biotic preformances examined, especially, to the fecundity of females. An appreciable reduction in fecundity of infected females was observed as compared with that of non-infected ones in summer or in the 3rd generation. Decreases in the percentage of infected females in experimental populations were greater at 25℃ and 30℃ than at 20℃ from the parent to F_1 generation. Based on these facts, it is suggested that temperature is one of the factors involved in the inter-generation changes in the percentage of infected N. cincticeps.

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詳細情報 詳細情報について

  • CRID
    1573950401656337920
  • NII論文ID
    110001105005
  • NII書誌ID
    AA00543238
  • ISSN
    00036862
  • 本文言語コード
    en
  • データソース種別
    • CiNii Articles

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