Seasonal Variation of Population Density of Pine Shoot Moths and their Hymenopterous Parasites, observed in Aichi Prefecture

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  • マツノシンクイムシとその寄生蜂の生息数について
  • マツノシンクイムシ ト ソノ キセイバチ ノ セイソクスウ ニ ツイテ

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Abstract

Seasonal variation of population of the pine shoot moths and their hymenopterous parasites in Aichi, Central Japan, was determined by examining the infested shoots collected from plantation of the Japanese black pine, Pinus Thunbergii PARL. Throughout a year, Evetria cristata WALSHINGHAM was the dominant species among four species of pine shoot moths found, and responsible for a large part of infestation in the pine shoots. Rhyacionia duplana simulata HEINRICH was the sub-abundant species, particularly in June and July, but level of population densities of Dioryctria splendidella and Eurhodope sp. were the lowest throughout a year. Among the hymenopterous parasites, Lissonota evetriae UCHIDA, Temelucha sp. and Pediobius sp. were fairly dominant.

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