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-   -   What infection is this? (http://www.orchidboard.com/community/cattleya-alliance/106397-infection.html)

Merita 03-28-2021 01:49 PM

What infection is this?
 
1 Attachment(s)
Hello everyone: I always have problems because I grow outdoors, under trees. Here I show you what is happening to me in the substratum of the cattleyas, this is full of spider webs that join the barks, I have already transplanted several pots and it is general, which insect will it be? will it be thrips? Please help!

SouthPark 03-28-2021 03:32 PM

Merita ----- did you begin to do the transplanting due to the catts taking a bad turn in health?

I have read that webbing can be caused by bark louse/lice, which aren't a threat to plants. Will be interesting to find out what the cause of these webs are in this case.

estación seca 03-28-2021 06:42 PM

It's probably a spider.

Merita 03-28-2021 08:08 PM

Quote:

Originally Posted by SouthPark (Post 954056)
Merita ----- did you begin to do the transplanting due to the catts taking a bad turn in health?

I have read that webbing can be caused by bark louse/lice, which aren't a threat to plants. Will be interesting to find out what the cause of these webs are in this case.

I saw some plants that were stagnating and decided to transplant them, that's where I first found these membranes that are joining the substrate and that are difficult to remove, for me they are suffocating the roots. I do not rule out that they are lice from the substrate because they tend to decompose it, and what can I use to eradicate them?

---------- Post added at 08:08 PM ---------- Previous post was at 08:03 PM ----------

Quote:

Originally Posted by estación seca (Post 954074)
It's probably a spider.

No, I don't think it's spider, it's all the substrate wrapped in this that is unpleasant, it looks sticky, and the same is in old pots as in those that have been transplanted less than a year ago.

estación seca 03-28-2021 11:55 PM

Another possibility is fungal mycelium growing on decomposing bark.

SouthPark 03-29-2021 12:36 AM

Merita ----- do those webs appear even in parts of the tree that aren't occupied by the orchid's roots?

If suffocation appears to be what is happening, then could probably try spraying pyrethrin into a test area (away from the orchid) ------ to see if it is effective. Or spray some imidacloprid onto the test area.

Otherwise - if it happens to be fungal threads ----- not sure if it is - then could also spray fungicide in another test region.

Merita 03-29-2021 01:13 PM

Quote:

Originally Posted by SouthPark (Post 954105)
Merita ----- do those webs appear even in parts of the tree that aren't occupied by the orchid's roots?

If suffocation appears to be what is happening, then could probably try spraying pyrethrin into a test area (away from the orchid) ------ to see if it is effective. Or spray some imidacloprid onto the test area.

Otherwise - if it happens to be fungal threads ----- not sure if it is - then could also spray fungicide in another test region.

I thought they were thrips nests but when I peeled off the bark on the substrate I saw that it was strongly attached to it, I think it is an insect but it is not visible, and I am seeing the bark that is degrading in those parts, I already applied insecticide Orthene but you have to break up that spider web, I don't think the water will penetrate, I have seen new roots covered as well. I am peeling off the substrate and cleaning it superficially, I cannot change it, there are many.

---------- Post added at 01:13 PM ---------- Previous post was at 01:11 PM ----------

Quote:

Originally Posted by estación seca (Post 954104)
Another possibility is fungal mycelium growing on decomposing bark.

They are not very wet, there is a lot of dry and I cannot water every day


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