New Grower Yellow patches on mid leaves

[timbro]

I am on day 47. Been flowering for a few weeks now. I am getting some yellow patches on the middle leaves. A lot of the lower leaves have turned yellow/died. If I look with a magnifier the yellow areas are all around the pores of the leaves. Also the steams of the affected leaves are losing their green color. Is this normal? I am using MG with slow release, distilled water with calmag plus.

Last pic you can see how its just a lot of little dots and not completely yellow. And like i was saying when I look under magnification the yellow is on the pores.

Any ideas?

 

[namvet25]

Can you rub the yellow spots off?

 

[timbro]

Can you rub the yellow spots off?

No. I scratched it and nothing happens.

 

[namvet25]

I thought if it rubs off it could be a fungus but I guess not. I havn't seen this before and I did some searching and didn't find anything.Lets wait and see if somebody else can come up with a answer.

 

[Joe12654]

Do you mist your plants if you mist during the light period and have high temps the moisture can evaporate fairly fast and discolour leaves or spilling nutes during feeding. I just guessing to be honest not seen anything quite like that before.

Spider mite do cause whitish dots but I really doubt it's that.