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タイトル山口県阿東町徳佐における薬剤耐性リンゴ斑点落葉病菌の発生実態
タイトルヨミヤマグチケンアトウチョウトクサ ニオケル ヤクザイタイセイ リンゴ ハンテンラクヨウビョウキン ノ ハッセイジッタイ
タイトル別表記Occurrence of Fungicide-resistant Strains of Alternaria mali in Tokusa, Ato-cho, Yamaguchi Prefecture, Japan
作成者田中, 秀平
下村, 慎一郎
高島, 英司
勝本, 謙
西, 泰道
作成者ヨミタナカ, シュウヘイ
シモムラ, シニチロウ
タカシマ, エイジ
カツモト, ケン
ニシ, ヤスミチ
作成者別表記Tanaka, Shuhei
Shimomura, Shin'ichiro
Takashima, Eiji
Katumoto, Ken
Nishi, Yasumichi
作成者所属山口大学農学部
内容記述(抄録等)Occurence of polyoxin- or iprodion-resistant strains of Alternaria mali Roberts, the causal fungus of Alternaria blotch of apple, was investigated by the minimum inhibitory concentration method at two orchard (Orchards A and B) in Tokusa, Ato-cho, Yamaguchi Prefecture, located at one of the warmer districts among the apple-growing areas in Japan, from 1984 to 1988. In Orchard A the, the frequency of polyoxin-resistant strains was 60.3% in 1984, and decreased gradually to 46.9% in 1986. It quickly decreased to 27.0% in 1987 and to 8.9% in 1988. This last value reached to a level at which the reapplication of polyoxin in Orchard A was available. In Orchard B, on the other hand, the frequency was 51.5% in 1984, and decreased slowly to 37.5% in 1988. This last value proved that the reapplication of polyoxin in Orchard B should be forbidden. Decrease in the frequncy at both orchards was considerably slow compared with that reported at apple-growing orchards in northern Japan. The overwintered causal fugus on apple plants was detected by isolating from every portions of fruiting branches in April of 1987 and 1988. The frequency of the fungus was highest on the barks of nodes, and also high on barks of internodes and on scaly leaves. Polyoxin-resistant strains as well as susceptible strains at Tokusa may abundantly overwinter under the relatively warmer condition than that in northern Japan. This may cause the slow decrease in the frequency of polyoxin-resistant strains at Tokusa. Frequency of iprodion-resistant strains in both orchards kept a low level of value from 1984 to 1988. Therefore, the iprodion-resistant strains of A. mali at Tokusa were suggested to havenot been affected to increase their frequency by the present controlling system in this district in which iprodion has been applicated one time a year.
本文言語jpn
主題農学
資料タイプtext
出版者山口大学農学部
出版者ヨミヤマグチ ダイガク ノウガクブ
NII資料タイプ紀要論文
ISSN0513-1715
NCIDAN00244250
学内刊行物(紀要等)山口大学農学部学術報告
掲載誌名山口大学農学部学術報告
掲載誌名別表記Bulletin of the Faculty of Agriculture, Yamaguchi University
37
開始ページ49
終了ページ60
発行日1989
著者版/出版社版その他
リポジトリIDD490037000004
地域区分山口大学
URIhttp://www.lib.yamaguchi-u.ac.jp/yunoca/handle/D490037000004