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題 名 | Spreading, Seasonal Migration and Population Fluctuations of the Rice Water Weevil (Lissorhoptrus Oryzophilus) (Coleoptera: Curculionidae) in Central Taiwan=水稻水象鼻蟲在中臺灣的擴散、季節性遷移及族群動態 |
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作 者 | 廖君達; 陳慶忠; | 書刊名 | 植物保護學會會刊 |
卷 期 | 47:4 民94.12 |
頁 次 | 頁305-318 |
分類號 | 434.111 |
關鍵詞 | 水稻水象鼻蟲; 擴散; 季節性遷移; 族群動態; Rice water weevil; Spread; Seasonal migration; Population fluctuation; |
語 文 | 英文(English) |
中文摘要 | 水稻水象鼻蟲( Lissorhoptrus oryzophilus Kuschel )於 2000 年二期稻作首次在中臺灣發現建立族群, 2001 年普遍發生於臺中縣沿海鄉鎮水稻栽培區, 2002 年一期稻作更南向擴展至彰化縣西北部鄉鎮,發生面積達 8100 公頃。然而,水稻水象鼻蟲在隨後的數年向南擴展出現停滯。本試驗進行調查水稻水象鼻蟲在水稻休閒期的潛伏處所,以瞭解其遷移特性。稻田冬季休閒期, 16.7 %~33.3 % 的稻樁樣本可檢出水稻水象鼻蟲成蟲,顯示田間殘留之稻樁根際為成蟲的越冬處所,其他包括竹叢或防風林木下的表土及田埂表土樣本均可檢出成蟲。一期稻作收割後的休閒期, 50 %~75 % 的稻樁樣本及 25 %~58.3 % 的田埂表土樣本均可檢視到成蟲;而在竹叢或防風林木下的表土則未檢視到成蟲,但田埂禾本科雜草及再生稻苗葉片仍有受害現象,顯示新一代的成蟲並無明顯的越夏蟄伏情形。在田間水稻水象鼻蟲一年發生兩個世代,成蟲於 3 月中旬達到高峰。 3 月下旬即可在根部檢出幼蟲, 4 月下旬幼蟲進入高峰期。 5 月上旬可檢視到蛹,第一世代成蟲則於 5 月下旬起陸續羽化。二期稻作生育期間,幼蟲於 8 月中旬即可檢出, 8 月下旬至 9 月上旬為發生盛期;第二世代成蟲則於 9 月中旬起陸續羽化。 |
英文摘要 | The rice water weevil (RWW), Lissorhoptrus oryzophilus Kuschel, was first observed in Taichung County in the second-crop rice of 2000, and soon spread to the coastal towns of Taichung County in central Taiwan in the first-crop rice of 2001. Subsequently, RWW further invaded the northwestern part of Changhua County in the first-crop rice of 2002, and the infested area reached to 8,100 ha, although the southern spreading of RWW has been retarded in subsequent years. This study investigated the inhabiting sites of adult RWWs during rice fallow periods in the winter and summer seasons to better understand their migration characteristics. In the period when rice is not planted in the winter season, adults were detected in 16.7%~33.3% of samples from rice stubble. The results indicated that adult RWWs hibernate at the base of rice stubble during fallow winter periods. Otherwise, adult RWWs also hibernate in the surface soil and leaf litter of bamboo groves, woodland groves, and at the base of grasses clumps and ground trash on levees. After harvesting the first cropping rice, adult RWWs were detected in 50%~75% of samples from rice stubble and 25%~58.3% from levees. Furthermore, during the fallow periods of the summer season, adult RWWs were not detected in the soil or leaf litter of bamboo groves or woodland groves; but fed on Gramineae grasses on levees and newly germinated rice seedlings from dropped grain in paddy fields. This indicates that newly emerged adults do not have an obvious dormant behavior at this time. The RWW has 2 generations annually in central Taiwan. The density of adult RWWs reached its peak in mid-March and larvae were observed on the root portions in late March. The maximal larval density occurred in late April. Pupae were found primarily on the root portions in early May. The first-generation adults began to pupate in late May. During the second cropping rice season, larvae were observed mostly in mid-August, with maximal densities from late August to early September. Second-generation adults began to pupate in mid-September. |
本系統中英文摘要資訊取自各篇刊載內容。