Quote:
Originally Posted by Pencil
Orchid Whisperer, thank you for replying! The other leaves had only a spot or two. Would you advise me to buy the plant?
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As Dirty Harry said, "do you feel lucky"?
Seriously, there are pros and cons, and ultimately the decision is yours.
---------- Post added at 08:09 AM ---------- Previous post was at 07:20 AM ----------
Quote:
Originally Posted by Pencil
Thank you very much! The problem with virus testing is that the hobbies (including keeping plants) aren't very developed in my country and that's why I don't think I'll find virus testers. How can a virus be transmitted? I know that using the same cutting tools is a way, but are there others? What would happen if a leaf of a sick plant touches that of a non-sick or if a sick plant is in one room with healthy ones? I'm asking because I have other orchids in the same room. So you advise me to buy it? Also, I may not be able to buy a fungicide immediately and I will keep the infected plant in one room with the others. Will they be infected?
Some of my other orchids have had strange spots on their leaves for years. Can I ask you about them here or in a new thread.
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Your last question, I suggest new thread(s).
Other matters: there are virus testing labs in Europe and the United States, and you could contact one of them for advice. I have no idea if they can accept your plant material for testing, but they might be able to tell you where to find a virus testing lab you can use, or send you home test kits.
I've never heard of airborne orchid virus transmission, butvIm not a plant virologist. Viruses are spread by plant juices contacting plant-to-plant, either through improperly sterilized tools (flame sterilize, or use a strong oxidizer like chlorine bleach), insect transmission, or direct contact of broken or bruised leaves, roots, stems, or exuded sap.
Regarding fungus, you can supress fungus to some extent by providing optimal growing conditions and supplemental calcium and magnesium. I supply Ca and Mg by dissolving gypsum (or plaster of Paris) and Epsom salts, about 1 or 2 ml each per 4 liters, and mixing Roughly 250 to 500 ml of that solution per 4 liters when I water. I've had Vandas with a significant Phyllosticta infection lose the infection with proper nutrition, sunlight, air movement, and Ca + Mg, without adding fungicide treatment. I do have fungicide for persistent cases.
I recommend that anyone wanting to know more about orchid nutrition, diseases, and general orchid care spend a lot of time reading the articles posted on the St. Augustine Orchid Society website.
St. Augustine Orchid Society - North Florida Orchid Growing They provide a lot of good information.