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  #1  
Old 11-24-2021, 01:37 PM
SG in CR SG in CR is offline
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Will moving orchids to lower light cause bud drop? Male
Default Will moving orchids to lower light cause bud drop?

I have 2 Catasetums and a Cattleya hybrid that are in bud and I want to protect them from the elements till they are done blooming. Would bringing them indoors and putting them on an east facing window sill (they were outdoors with light shade) cause them to abort their flower buds? I normally try not to disturb orchids once they are in bud but I've been having problems with insects and slugs gnawing on them before they even open.
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Old 11-24-2021, 01:50 PM
Clawhammer Clawhammer is offline
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Will moving orchids to lower light cause bud drop?
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I have a thrip infestation in my main grow room and have been moving in-bud cattleya and catasetum to a separate room (lower temp and humidity) in order to control the thrips and get a normal bloom. I have had no bud blast.

YMMV
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Old 11-24-2021, 05:04 PM
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Will moving orchids to lower light cause bud drop?
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you still have them claw? Ouch
I'm still discoveries a few outbreaks but overall I think it's contained.
I was literally looking at a poorly phal tonight wondering why and out scurries a thrip. I keep telling myself that has to be the last of them
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Old 11-24-2021, 05:05 PM
SG in CR SG in CR is offline
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Will moving orchids to lower light cause bud drop? Male
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Quote:
Originally Posted by Clawhammer View Post
I have a thrip infestation in my main grow room and have been moving in-bud cattleya and catasetum to a separate room (lower temp and humidity) in order to control the thrips and get a normal bloom. I have had no bud blast.

YMMV
I've put up a table next to the window and brought them in. Hopefully they won't drop the buds. I've had bad experiences going from a protected greenhouse to my open air growing area. A while back I bought a Catasetum hybrid a week or 2 away from flowering and it dropped all it's buds 3 or 4 days afterward. Hence my worry the same thing might happen bringing them indoors.
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Old 11-24-2021, 05:08 PM
Clawhammer Clawhammer is offline
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Will moving orchids to lower light cause bud drop?
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Originally Posted by Shadeflower View Post
you still have them claw? Ouch
I'm still discoveries a few outbreaks but overall I think it's contained.
I was literally looking at a poorly phal tonight wondering why and out scurries a thrip. I keep telling myself that has to be the last of them
I have about 70 catasetum out of 450 orchids in a 15 x 15 grow space so eradication is tough right now. I am focusing on a knockdown strategy until I defoliate all my catasetinae on Dec 15th, then I will have a chance. I'm going all in.
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  #6  
Old 11-25-2021, 06:42 AM
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Will moving orchids to lower light cause bud drop? Male
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Quote:
Originally Posted by Clawhammer View Post
I have about 70 catasetum out of 450 orchids in a 15 x 15 grow space so eradication is tough right now. I am focusing on a knockdown strategy until I defoliate all my catasetinae on Dec 15th, then I will have a chance. I'm going all in.

Have you tried releasing ladybugs?
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I fertilise my orchids with the ashes of the ones that didn't want to bloom.
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Old 11-25-2021, 12:35 PM
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Will moving orchids to lower light cause bud drop? Male
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I have not seen bud drop, but I have seen that flowers that develop after moving the orchid to low light are often smaller than those that developed at the higher light levels.

-Keith
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Old 11-25-2021, 12:50 PM
Clawhammer Clawhammer is offline
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Will moving orchids to lower light cause bud drop?
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Have you tried releasing ladybugs?
I did but previously applied pesticide killed them. I tried predatory mites with better, but ultimately similar results.
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Old 11-25-2021, 12:59 PM
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Quote:
Originally Posted by Clawhammer View Post
I have about 70 catasetum out of 450 orchids in a 15 x 15 grow space so eradication is tough right now. I am focusing on a knockdown strategy until I defoliate all my catasetinae on Dec 15th, then I will have a chance. I'm going all in.
After finding a phal I purchased from Norman's was infested with mites, I put sticky traps around my greenhouse to see if there was a more widespread problem. The only pests I've seen are a few fungus gnats. This led to me to find that one of my C. intermedia in a plastic pot was laced with white fungus threads running throughout the bark mix.

I hate to ask, but in decades growing orchids I never had a thrip infestation but I've heard a lot about them on this forum. Would you mind posting a couple pictures of the damage they caused?

-Keith

---------- Post added at 10:59 AM ---------- Previous post was at 10:52 AM ----------

Quote:
Originally Posted by Clawhammer View Post
I did but previously applied pesticide killed them. I tried predatory mites with better, but ultimately similar results.
I rarely use pesticides, but I treated one plant in my greenhouse with a systemic pesticide this summer. After releasing 2000 ladybugs a month later that plant was soon surrounded with 20-30 dead ladybugs.

-Keith
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Old 11-25-2021, 01:00 PM
Clawhammer Clawhammer is offline
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Will moving orchids to lower light cause bud drop?
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Quote:
Originally Posted by K-Sci View Post
After finding a phal I purchased from Norman's was infested with mites, I put sticky traps around my greenhouse to see if there was a more widespread problem. The only pests I've seen are a few fungus gnats. This led to me to find that one of my C. intermedia in a plastic pot was laced with white fungus threads running throughout.

I hate to ask, but in decades growing orchids I never had a thrip infestation but I've heard a lot about them on this forum. Would you mind posting a couple pictures of the damage they caused?

-Keith
Sure thing, I don't have a lot of pics but I'll take a few. I have gotten good at protecting in bud plants from major infestations while in bloom.

The damage is always the same on open flowers, silvery gray dehydrated patches starting at the edges of the petals and sepals. They feed from the edge of the petal always. This damage is often the only sign you will see before seeing a few adults scurrying around. If left unchecked they get into buds that ultimately blast.

They are great hiders and they know I am a threat. They spend one phase of their lifecycle in the soil so you have to treat the soil and the plants multiple times. They are only visible to the eye in their last instar and do most of their damage before that.

They will infest all types of flowers but seem to have favorites and their tastes seem aligned with mine unfortunately (catasetum and cattleya). They leave most orchid leaves alone except catasetum and lycaste.

They can travel between plants that touch leaves and on noses / fingers on people in the grow room. I know I have infected plants by sniffing multiple flowers. They however don't seem to be able to cross surfaces and especially can't figure it out if a container is sitting in a tray

Spinosad is the best pesticide but the type I have have some resistance.

Last edited by Clawhammer; 11-25-2021 at 01:05 PM..
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