White bleached spots on leaves

[obijohn]

This also happened a time or 2 in a grow maybe 10 years ago. These are outdoors, noticed this on my morning inspection today, mostly on one plant but a little on the others. My thoughts are reflected/amplified sun (like if a plant was in direct sun, and also getting reflection from a mirror). Plant are between a storage shed and a day room. There's aluminum around the windows of the shed, and the dayroom windows, and the dayroom door. I've noticed when I am out there, if my body is blocking the sun, there's still light on the plants from the sun's rays bouncing off the aluminum. Could this be the case? It does seem to happen more to a plant that's in one specific area.

The photo below is not of my plant, but I found this while searching - there are multiple bleached areas on mine

Only other thing I can think of is spraying spinosad, but I did that 3 days ago, at dusk, while the plants were in the dayroom because of rain, which is where they stayed until yesterday afternoon when the weather system moved out. The white spots were not there last evening.

BTW

 

[Funkentelechy]

Looks a tiny bit like thrip damage, hard to say though.

 

[obijohn]

Looks a tiny bit like thrip damage, hard to say though.

You didn't read my post, you didn't understand my question. This isn't my plant, just a good example of the white bleached spot like the ones I do have. I'm not asking about thrips or anything like that

 

[Funkentelechy]

I read your post, I know that's not your plant.

Truthfully I didn't see the faded-out white area on the leaf in the picture when I answered, I was looking at the small white specks on the leaf in that picture. Your right that's not thrip damage, I was looking at the wrong thing in the picture.
That does look like light damage if I had to guess. And a little like a contact burn, I get similar looking burns occasionally on my plants from sap dripping on them from a pine tree nearby. Obviously you would notice sap, that's not it but it produces burns that look similar. Hopefully, someone else has a suggestion, good luck.

 

[obijohn]

I read your post, I know that's not your plant.

Truthfully I didn't see the faded-out white area on the leaf in the picture when I answered, I was looking at the small white specks on the leaf in that picture. Your right that's not thrip damage, I was looking at the wrong thing in the picture.
That does look like light damage if I had to guess. And a little like a contact burn, I get similar looking burns occasionally on my plants from sap dripping on them from a pine tree nearby. Obviously you would notice sap, that's not it but it produces burns that look similar. Hopefully, someone else has a suggestion, good luck.

Well, aside from the spraying 4 days ago, they've been under cover since last weekend until yesterday afternoon. I haven't fed since last Friday, and watered for the first time today, since it's been cool, damp, and no direct sunlight, they didn't show they needed it. So I dunno about anything spilling on them. I do see new, fresh white pistils just now since watering, so looks like they waking up from their 'hibernation'

 

[Funkentelechy]

I do see new, fresh white pistils just now since watering, so looks like they waking up from their 'hibernation'

Yeah, I live in NorCal as well, everything slowed down for a couple of days with the low temps but it's warming back up again. I saw your other thread about delayed flowering, I have a few that are at a similar stage of development. It will be mid-November for sure for a couple of mine, gonna have to drag out the heater to finish them. Ah well, it's a labor of love.

 

[BlandMeow]

Maybe the sun reflecting from a window hitting it. That could explain how it happened even while being undercover.

 

[obijohn]

Maybe the sun reflecting from a window hitting it. That could explain how it happened even while being undercover.

Pretty much my thought. It didn't happen when they were undercover, I had put them out when the sky cleared the previous afternoon and noticed the spots next morning. But yeah, reflection most likely IMO

 

[Billy the Mountain]

Where in the pics is there any evidence of light damage?

The tiny spots certainly aren't caused by excessive light

 

[BlandMeow]

Where in the pics is there any evidence of light damage?

The tiny spots certainly aren't caused by excessive light

In the center of the pic, there is a leaf that is almost totally bleached out. Hard to see as it kind of blends with the background.

 

[Billy the Mountain]

In the center of the pic, there is a leaf that is almost totally bleached out. Hard to see as it kind of blends with the background.

Perhaps a different picture would clarify, but that doesn't look like light burn to my eye

 

[obijohn]

Perhaps a different picture would clarify, but that doesn't look like light burn to my eye

Here is my plant. There is a plant on each side of it with no spots and it seems location specific on this...there are a few other similar spots also an the same side of the plant. Plants are in front of a storage shed and these spots only show on the front and facing a specific direction. I have not spilled anything on them.

 

[Billy the Mountain]

Here is my plant. There is a plant on each side of it with no spots and it seems location specific on this...there are a few other similar spots also an the same side of the plant. Plants are in front of a storage shed and these spots only show on the front and facing a specific direction. I have not spilled anything on them.View attachment 5202095

Interesting

Still, if it was due to excessive light, the symptoms should be more uniform rather than isolated spots or blotches

Your guess is as good as mine, I hope you figure it out

 

[BlandMeow]

Interesting

Still, if it was due to excessive light, the symptoms should be more uniform rather than isolated spots or blotches

Your guess is as good as mine, I hope you figure it out

Light reflecting off a window can be concentrated and focused. Similar to a magnifying glass burning.

 

[obijohn]

Reflections off the aluminum framing and door seem to fit the bill IMO

 

[Nope_49595933949]

Looks like jizz.



I know, not helpful and childish.

 

[Billy the Mountain]

Light reflecting off a window can be concentrated and focused. Similar to a magnifying glass burning.

Light reflecting off a window gets scattered, not focused; quite the opposite of a magnifier

 

[BlandMeow]

Light reflecting off a window gets scattered, not focused; quite the opposite of a magnifier

I used to have casement windows, the kind that crank out. The light from the sun at a certain time would hit at the right angle and caused a small patch of my grass to burn.

 

[obijohn]

Light reflecting off a window gets scattered, not focused; quite the opposite of a magnifier

Not talking about windows, talking about aluminum framing and aluminum door.

 

[Hollatchaboy]

Looks like jizz.



I know, not helpful and childish.

But definitely funny.