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qdshn2008
2016-08-21, 5452 Views
qdshn2008
#SOS 养了3年的海棠,最近叶子都是这样的斑点,请问是什么原因呢?
 #SOS  养了3年的海棠,最近叶子都是这样的斑点,请问是什么原因呢?
 #SOS  养了3年的海棠,最近叶子都是这样的斑点,请问是什么原因呢?
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黑斑病,清除枯枝、落叶,及时烧毁。 喷50%多菌灵可湿性粉剂500-1000倍液,或75%白菌清500倍液,或80%代森锌500倍液,7-10天1次,连喷3-4次。
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如果是锈病可以喷15%粉锈宁,稀释1500倍和1:200倍的波尔多;如果是菌斑,可以用托布津、百菌清
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