请问专家这`是什么病

2025-03-28 16:16:52
推荐回答(1个)
回答1:

番茄花脸病。成因:
一 、温度过高,导致上色不均匀形成花脸。 白天温度达到了32度左右,此时,高温会使正处于转色期的果实无法正常转色,西红柿果实由绿变红是因为有茄红素的形成,温度高于32度时,茄红素形成困难。这是造成当前西红柿无法正常转色的重要原因。  
二、偏失氮肥也会造成果实转色不正常。 如在土壤中过多施用氮肥或其它化肥,使土壤溶液的浓度过高,导致PH值失衡,此时会导致西红柿上色不均。   三、病毒病导致花脸。 当西红柿感染病毒病时,果实上的表现是着色不均,且果面凹凸不平,这种现象多为条斑病毒。避免这种情况就要从种子消毒、苗期防病、生长中治虫等各方面入手,严格防止病毒农村信息化服务网站病的发生。  
 四、缺硼也会造成西红柿花脸现象发生,一般表现在果蒂处密生褐色裂纹或病斑,并且裂纹或病边变硬不湿不烂。对此,菜农可在种植下茬时施入适量硼肥,或喷施硼砂溶液。

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