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日夜溫差大 農改場籲注意蔬果染露菌病
Nov 30th 2013, 07:16

【李恩慈/台南報導】近日早晚溫差大,除了人要注意自身保暖外,連種植的蔬果也不能輕忽!台南農業改良場呼籲農民注意,日夜溫差極大的氣候,容易讓作物產生「露菌病」,葫蘆科作物、十字花科作物、豆科作物和菠菜、萵苣、青蔥等都非常容易發生露菌病,由於夜間濕度大會促進病原菌生長,晨間濕冷的露水更會加速病害傳播。
 
農改場指出,病原菌侵入葉部後,會產生如白霜覆蓋的狀況,然後在相對位置形成黃化褪色斑,接著逐漸擴大成淡褐色的病斑,最終讓葉片枯萎、葉菜類的莖梗膨脹;農改場人員建議農民,夜間應盡可能降低田間或設施內的濕度,並加強環境通風,才能大幅降低染病菌可能。
 
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蔥感染露菌病的病徵。農改場提供

胡瓜染病,葉面一處處黃褐色病斑。農改場提供

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