yellow dots on fan leaves

**forager** · 04-01-22, 11:50 AM

anybody have any idea what these yellow dots are?
this is week 7 of flower. feminized white widow in soil under LED. RH typically ~50%.
this is my first grow using plant magic old timer bloom and grow only. not sure if this is typical late-flower yellowing? but this started weeks ago just on the occasional leaf and now it is spreading. i am not too concerned because i am only a couple of weeks from harvest, but just wondering what is going on.

the leaf on the left is what it looks like in early stages. the leaf on the right is the worst of it (so far).

any ideas? thank you for the help <3

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**Herbitual** · 04-01-22, 02:12 PM

Checked under the leaves with a microscope for bugs? Probably the first port of call.

**forager** · 04-01-22, 02:55 PM

Originally Posted by Herbitual

Checked under the leaves with a microscope for bugs? Probably the first port of call.

i did but i can't find anything. i checked along the stems too.
now you mention it, around the time i switched to flower there were some suspicious looking blobs on some of the stems. i looked at them under the microscope and they just looked like some kind of sap secretion or something (but maybe a bug sack of some sort?). i removed what i could find and they didn't seem to cause any problems. i haven't seen any for a while but if they were bug related i'll bet that's what it is. the little bastards!

i will keep looking every time i am in the room. i couldn't find any deficiencies or burns that looked like this. mg deficiency was close but it's not quite right, so i guess bugs is the most likely culprit

thank you

**M_C** · 04-01-22, 03:07 PM

Do you have a pic of the whole plant?

**mpsj** · 04-01-22, 04:11 PM

Originally Posted by forager

i did but i can't find anything. i checked along the stems too.
now you mention it, around the time i switched to flower there were some suspicious looking blobs on some of the stems. i looked at them under the microscope and they just looked like some kind of sap secretion or something (but maybe a bug sack of some sort?). i removed what i could find and they didn't seem to cause any problems. i haven't seen any for a while but if they were bug related i'll bet that's what it is. the little bastards!

i will keep looking every time i am in the room. i couldn't find any deficiencies or burns that looked like this. mg deficiency was close but it's not quite right, so i guess bugs is the most likely culprit

thank you

Sure looks like a bug issue to me.
Side note...If you have purple stems you might also have a P deficiency or a temperature issue.

**Blue61** · 04-01-22, 05:24 PM

Originally Posted by Herbitual

Checked under the leaves with a microscope for bugs? Probably the first port of call.

^^^

The one on the left defo looks like insect damage.

**yello-mello** · 04-01-22, 07:28 PM

reminds me of spider mite damage.. any tiny black spots on the underside of the leafs.. hope not their a pain to get rid of.

**forager** · 05-01-22, 07:56 AM

Originally Posted by M_C

Do you have a pic of the whole plant?

i will take one as soon as i can. thanks

**forager** · 05-01-22, 08:05 AM

looks like it's likely to be bugs then. i think i know where they might have come from, i left one of my bags of soil outside for a few days a while back and i had a few bugs pop up in another plant, which i had to isolate. ill bet i used that bag of soil for these plants too.

thanks for the help everybody. i will try to get a good picture of the whole plants and have another thorough check over for bugs. hopefully i don't have to resort to ladybirds/ladybugs! i am hoping to harvest in the next 2 weeks if i can (if the plants are ready) so it might not be worth it.

thank you all for the help