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題 名 | 水稻螟蟲為害與防治基準 |
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作 者 | 劉達修; | 書刊名 | 臺中區農業改良場研究彙報 |
卷 期 | 25 1989.12[民78.12] |
頁 次 | 頁1-2 |
分類號 | 434.111 |
關鍵詞 | 水稻; 防治; 為害; 螟蟲; |
語 文 | 中文(Chinese);英文(English) |
中文摘要 | 近數年來三種水稻螟蟲之發生,在台中地區已有增加之趨勢。一點螟 蟲(Tryporyza incertulas)僅侷限發生於大甲溪中游沿岸附近,若疏於防治,常導致 5∼18%之白穗損失,但區下其他地區則未見其蹤跡。大螟(Sesamia inferus)發生 相當普遍,一般密度不高,但在晚植稻或中間作常與二化螟蟲(Chilo suppressalis) 混合為害,而引起水稻嚴重的枯心與白穗。水稻品種間被害程度有差異,目前栽 培最廣的台農67號屬於被害最輕的品種。而二化螟蟲為害水稻幼株期所引起之 葉鞘黃變率(側黃莖)與枯心率之關係,其變數頗大,對於該蟲防治基準之訂定, 目前可訂為當枯心率達5%以上時,始有防治必要,而葉鞘黃變率在11∼13%時, 則可引起5%左右之枯心率。故決定施藥與否,應視水稻移植後15∼20天計算葉 鞘黃變率是否達到此標準,此時期約為螟蟲2∼3齡蟲期,施藥防治效果最佳。 利用性費洛蒙誘引二化螟蟲雄蛾之效果極優,所誘集蟲數較誘蟲燈為多,可做為 偵測該蟲年中發生消長之有利工具。 |
英文摘要 | There are three species of rice borer have occurred and increased gradually in recent years in central Taiwan. Tryporyza incertula occurred only along the Tachia river. Control is negligent and induce 5 - 8% yield lost, but other areas can't found the trace of this insect. The occurrence of Sesamia inferus is very popular, but the population density is not very high. S. inferus can damage the mid-crop and late crop, while the Chilo suppresalis induce the white heart and white head. There are significantly difference among rice strains, but Tainung 67 is seriously infected. The relationship between the yellowish rate of leaf sheath and white heart caused by Chilo suppresalis on the young rice plants have great variation. The control threshold, when the white heart rate was over 5% and control is needed.The yellowish rate of leaf sheath is 11-13%, can induce about 5% white heart. The chemical spraying is followed when the yellowish rate of leaf sheath have reached 11-13%, which is about 15-20 days after transplantingand 2-3 instar larvae occurred, we can get more effective., result. To utilize the sex pheromone to attract male Chilo suppresalis, it get good effectiveness and attract more insects than those of light trap, and it could be a monitoring tool for the population fluctuation of this insects. |
本系統中英文摘要資訊取自各篇刊載內容。