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題 名 | 臺中區一期稻作飛蝨及葉蟬類之防治適期 |
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作 者 | 劉達修; 張德前; | 書刊名 | 臺中區農業改良場研究彙報 |
卷 期 | 6 1982.06[民71.06] |
頁 次 | 頁62-69 |
分類號 | 434.111 |
關鍵詞 | 飛蝨; 葉蟬類; 臺中區; 稻作; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究按台中地區一期稻作同翅目害蟲∼黑尾葉 蟬 及 飛 蝨 類發生 情況,在水稻孕穗初期、抽穗期及糊熟期,分別施藥1∼3次,探討其為害對稻 谷造成的損失,及找出最佳防治時期及次數,以供田間防治之參考。試驗結果發 現,同翅目害蟲共同為害水稻可造成稻穀13.4∼27%之減產。其棲群從孕穗初期 1∼2隻 / 網,到糊熟期32∼137隻 / 網,呈累增之趨勢,其中黑尾葉蟬與飛蝨 類約各佔半數。在不同防治時期中,以抽穗期防治者產量增加最高,次為孕穗初 期及糊熟期。防治次數以三個生育期均施藥者之產量與收益最高。僅防治兩次 時,以抽穗期及糊熟期防治二次較佳,其純收益與防治三次者相似。因此,中部 地區第一期稻作防治同翅目害蟲,若自幼穗形成期至孕穗初期(水稻移植後55∼ 60天),如每一網掃蟲數達5隻以上就應注意防治;孕穗末期至抽穗期害蟲棲群 通常較高,必需徹底防治一次;乳熟期至糊熟期害蟲密度達10∼20隻以上,也 有防治價值。防治時應擇若蟲期效果較佳,一期稻作中若防治二次可獲較高之收 益。 |
英文摘要 | The optimal frequency and best timing for chemical control of both plant- and leaf-hoppers (mainly Laodelphax strialellus, Sogatella furcifera and Nephoettix cincticeps) were studied in the first rice crop of 1978 to 1980. Single application each at the initial booting, heading and doughy grain stage as well as 2 and 3 applications at 2 or 3 stages were compared in terms of the net profit gained. Results showed that the control at the heading was more critical than either at the initial booting or the doughy graing stage. However, the highest net profit was gained when 3 applications were made at 3 consecutive stages. When only 2 applications were planned, both the heading and the doughy grain stage would gave better result. In this case, we would like to recommend that in the first crop season when the hopper number reached 5 per net sweep at the initial heading (Ca 55-60 days after transpianting) a chemical application should be initiated. Another application during late booting to heading stage was indispensable. Whenever the hopper number reached 10-20 per net sweep at the milking to doughy grain stage one more spray was warranted. |
本系統中英文摘要資訊取自各篇刊載內容。