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2018年05月17日

氣候不穩定田間濕度高 易發生穗稻熱病 及時掌握防治時機確保產量


◎近日氣候不穩定,若加上田間濕度高,穗稻熱病容易發生,穗頸及稻穗一旦罹病,將直接造成減產。花蓮農改場籲請農友,要及時掌握防治時機,才能確保產量。

 花蓮農改場表示,稻熱病在高濕條件下容易發生,稻田栽植過密,或種植在通風不良的地區,特別需要注意防範。此外要控制氮肥的施用,早期葉色偏綠的水稻,穗肥應斟酌減施,以避免氮肥施用過量,使植株細胞柔弱,讓病原菌容易侵入。

 花蓮地區稻作大多已屆孕穗期至抽穗期,此時為穗稻熱病最佳防治時機,應注意採取預防措施。穗稻熱病的預防,首重施藥時機的掌握。花蓮農改場籲請農友,要把握抽穗前3-5天或齊穗後施藥,可有效減少病害發生與蔓延確保防治效果,若有防治上的問題可與花蓮農改場聯絡(03)8521108轉3600。(文:劉怡伶/圖:花蓮農改場)


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