Results of ecological investigation on Culicoides nipponensis TOKUNAGA, 1955 in Meiwa-cho, Taki-gun, Mie Prefecture

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  • 三重県多気郡明和町におけるニッポンヌカカ Culicoides nipponensis TOKUNAGA, 1955 の生態学的調査結果
  • ミエケン タキグン メイワチョウ ニ オケル ニッポンヌカカ Culicoid

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Abstract

Some ecological investigations on biting midges, mainly Culicoides nipponensis, were carried out with the light trap or dry ice trap in the cowshed and the paddy area in Mie Prefecture from 1972 to 1975. Results obtained were summarized as follows; 1) Biting midges captured with light trap in the cowshed were C. nipponensis, C. arakawae, C. pulicaris, C. sigaensis, C. odibilis and unknown one, 99% of them were C. nipponensis from June to September. The number of C. nipponensis increased in June and decreased rapidly in October. 2) Two-hourly collection in the cowshed and the surrounding paddy fields were carried out with light traps. From the experiment it was found that there was the difference in the host preference between C. nipponensis and the other species. 3) Biting midges were captured by dry ice traps at 14 points on paddy area in 1974 and 1975. The composition of species was nearly similar to that by the light trap in the cowshed, and 96% of all were C. nipponensis. There were some points where C. nipponensis was captured in large numbers or in small numbers. It is likely, therefore, that C. nipponensis does not inhabit uniformly in all the census area.

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