再次上網搜查過，中文網站很多只提供化學殺菌劑方法。而英文網站很多都提供Organic way to treat black spot。。。這是如何baking soda可以控制玫瑰黑斑病
Baking soda and vinegar: When vinegar and baking soda are sprayed on a fungus, changes the pH of the fungus thus killing it.
網上得到的資料的確有好有壞，我們是需要自己思考過濾而從中學習。
關於（changes the pH of the fungus thus killing it改變pH值從而殺死真菌）這種說法，我是需要多點時間去證實。
vandas姐你肯定baking soda對殺菌並無作用，相信你對這一定很有研究，可以供應多少資料好等我們學習嗎。
3# hkgorchid
To hear that your roses are still blooming, we may live in the same part of the world.
Love to see your post. My roses are mostly new breeds, I do have some traditional ones like the M ...
norman.ho 發表於 2014-4-1 09:02 AM
My roses are not young at all they are morethan 15 years old now! I was feeling sad because my wife had almost killed allof the roses with wrong pruning & tools 2 years ago. They are gettingbetter but still recovering & not as strong as previously. The weather haschanged this year as some of the roses are already flowered especially theyellow & white one which already had dead heads while the others are stillblooming. I have taken some pictures & will post them altogether as soon asthe others are flowered.
2# chowold2
I don't understand the words "剪裁", pardon my Chinese;
if you are talking about pruning,
I have absolutely no experience,
this is the first season they are planted;
I suppose I won't b ...
norman.ho 發表於 2014-4-1 09:27 AM
The best pruning period is late winter with bypass pruner & bypass lopper (the lopper is for thick stems or branches) cut the branches in 90 degrees so that the rain water will not stay on the cut areas thus to avoid bacteria. Take away all the leaves in order to let the roses have nice winter sleep. Fertilize the roses in early spring. My 2 cents!
The dead branches, stems & leaves must be cut otherwise the whole rose will die. Remember clean all the fallen leaves as they have disease. I generally use "Bayer" all in one rose & flower care. It can fertilize, insect control as well as disease control.
[quote]良兄，你真係要跟norman咁做，剪晒D黑斑葉，再落殺菌劑。我呢度有個自製殺菌劑配方，你可以試下
4茶匙baking soda + 1加侖水 再+幾滴肥皂液......用嚟噴D玫瑰 ...
chowold2 發表於 2014-4-5 01:08 PM [/quoteI
I don't command this kind of method & I never heard it before!
發表於 2014-4-5 01:08 PM
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, 多謝你同norman兄.
發表於 2014-4-6 07:29 AM
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