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題名 | 梨新病害之發現與預防=Occurrence and Control of New Pear Disease in Taiwan |
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作者 | 呂理燊; 蘇秋竹; | 書刊名 | 植物保護學會會刊 |
卷期 | 39:1 1997.03[民86.03] |
頁次 | 頁23-32 |
分類號 | 435.312 |
關鍵詞 | 梨新病害; 臺灣; New pear disease; Taiwan; |
語文 | 中文(Chinese) |
中文摘要 | 1994年6月間位於和平、東勢交界前往鞍馬山13K處發生梨樹病變,被害樹葉片轉紅,嚴重者死亡,經觀察及初步研究結果認定接近梨衰弱病(pear decline)。被害面積約80公頃,每年四月葉片開始轉紅,導致樹勢衰弱,分急速衰弱及慢性衰弱,前者出現病徵時同株不同枝幹一齊出現,數個月內或次春即死亡,慢性衰弱者多由某枝條開始發病後擴及全株,一般經數年後死亡。本病可能由菌質(Mycoplasma-like organism, MLO)所引起,目前只能用 PCR 測定。自然界由梨木蝨傳播,臺灣也於1994年10月發現梨黔木蝨(Psylla qianli)之存在。被害樹鬚根變少,產量及樹勢受損頗大。砍除病株,防治媒介昆蟲,注射四環黴素及多施有機肥可收良好之防治效果。 |
英文摘要 | New pear disease characterized by red leaf has been discovered at 13K, around border area of Tungsh and Hopin in central Taiwan. About 80 hapear orchards have been infested, red leaf appears in mid-to late-April and kept red color until earlier drop of the leaves in early winter. Affected trees finally died usually within 2-3 years, and in acute case(2% of the diseased trees) within that year. The disease is probably induced by Mycoplasma-like organism(PCR-detected), and considered to be pear decline. Suspected vector, Psylla qianli was first discovered and recorded by Chou and Fang. Roguing diseased plants, spraying insecticides to control Psylla, infusing tetracycline and amendments of 150-200kg organic matters per tree have been reconmended to curb the disease with very promise results. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。