Yellow patches on vanda and phrag leaves.

[Susie11]

I received a Vanda coerulea pink 'big' in the post on friday last week but today I have noticed that she has a lot of yellow patches on her leaf tips. I have also noticed a phrag that she was next to has similar patches (she was previously fine -).



I know the picture quality is not the best but when you have a problem with tech. then things happen. I can take better pics tomorrow if it helps.

Here is the phrag.



Can anyone help?

---------- Post added at 11:25 PM ---------- Previous post was at 09:25 PM ----------

I am thinking that it might be sunburn from being wet and then being placed too near the light fixture. Wishful thinking perhaps?

[SouthPark]

Originally Posted by Susie11

I am thinking that it might be sunburn from being wet and then being placed too near the light fixture. Wishful thinking perhaps?

If possible, could be ok to try keeping the leaves dry and stem too. And ensure good air circulation to the whole plant - leaves, media, roots and all. Also ----- you mentioned placed near a light fixture. Some growers have definitely reported plant damage by having the plant too close to a light source, especially when no diffuser attachment was used.

[Susie11]

Originally Posted by SouthPark

If possible, could be ok to try keeping the leaves dry and stem too. And ensure good air circulation to the whole plant - leaves, media, roots and all. Also ----- you mentioned placed near a light fixture. Some growers have definitely reported plant damage by having the plant too close to a light source, especially when no diffuser attachment was used.

So you don't think that it is bacterial then? I am just wondering whether to cut the affected parts off and dust with cinnamon.

Many thanks for your reply.

[SouthPark]

Originally Posted by Susie11

So you don't think that it is bacterial then? I am just wondering whether to cut the affected parts off and dust with cinnamon.

Many thanks for your reply.

Allow the leaf to just remain intact for now Susie. But watch it like a hawk. If the leaf becomes black or dark-brown and dries right out, then that's no problem.

If the area spreads significantly - and gets larger at a noticeably fast rate - even when you have moved the plant away from any intense light source (and even with good air circulation - then use sterile cutters to snip an adequate amount of the leaf off ..... and a tiny bit more (just in case).

If you happen to have some systematic fungicides for orchids, then just have some waiting in the wings too. Maybe not for now. But in future, or anytime you might need it. Eg. Mancozeb, Thiomyl, and phosphorous acid based fungicide for orchids.

At this moment - don't be alarmed. If you really did have the orchid up close to a light source, then that could be simply it. And the photos do appear to show a one-sided affair at the moment ---- as the same sides of the leaves have the issue - maybe.

[Susie11]

I shall do just that Southpark. I am keeping a close eye on her. If and when ....

Many thanks for helping me