Beech tree infestation by mulberry borer (Apriona japonica THOMSON) in northern Nagano Prefecture, central Japan.

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  • 長野県栄村のブナ林におけるクワカミキリの被害実態
  • ナガノケン サカエムラ ノ ブナリン ニ オケル クワカミキリ ノ ヒガイ ジッタイ

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Description

Damage to beech trunks (Fagus crenata Blume) caused by mulberry borer larvae (Apriona japonica THOMSON) was investigated in the beech forests in Sakae-village, northern Nagano Prefecture. No infestation was found in stands at elevations higher than 800m. However, infestation damage was commonly recognized in stands at elevations lower than 500m. Specifically, the most substantial damage occurred in stands located in areas characterized by heavy snowfalls (i.e. > 2m) as well as in warm-temperate zones (i.e. Warmth Index is > 85 [°C・month]).

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