日本ナシで初めて確認されたヒメボクトウの発生
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概要
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Damage to the Japanese pear by Cossus insularis was confirmed in Naruto City and Matsushige Town in Tokushima Prefecture, Japan, in June 2001, which was the first recording of infestation of C. insularis in the Japanese pear. In 2002, the ratios of damaged trees were surveyed and found to average 27.7% in the "Kosui" cultivar and 2.5% in the "Hosui" cultivar. The seasonal prevalence of adult emergence was also surveyed on the Japanese pear in 2002 and 2003. Adults emerged between mid-June and mid-August with a peak in number in early to mid-July.
- 2005-02-25
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