Hi, is this a cal mag defficiency?

Hi guys,

Week 7 of flowering, using soil with hps lights, thermostat/hydrostat with AC humidifier dehumidifier etc. Using sensi nutes with b52 and big bud, they were pre treated for fungy/insect with hydrogen peroxide, potassium bicarbonate, diatomaceous earth, cayenne pepper, neem oil and dish soap

At first I thought this was leaf septoria but after looking around it seems like it’s a nutrient defficiency

Just wanna make sure from the exp growers here, is this a cal mag defficiency?

Thanks

Have you checked for bugs?

3rd Monkey said:

Have you checked for bugs?

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Yes, there are no bugs

Those little white specs are a pretty classic symptom of spider mites...how far up the plant do the symptoms occur? All over the plant equally, the upper half of the plant, the bottom half?...

Logan Burke said:

Those little white specs are a pretty classic symptom of spider mites...how far up the plant do the symptoms occur? All over the plant equally, the upper half of the plant, the bottom half?...

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It’s on 1 plant, just a few leaves; it’s a plant which I’ve removed too many fanleaves

This really looks like classic bug damage! You may at some point had a small calcium issue, but those little dots you're looking at..are most likely, bug damage!
Spray a bit of water on the lower branches/leaves and see if you can spot the webs then with the watering sticking to them. Check for tiny webs between main stem and branches. Look at the underside of the leaves and you can likely see little bumps, be it clear or brownish.

You're long on mites and maybe a bit short on Ca. At 7 weeks in, you're best bet is to mitigate the pests, forget about the Ca and get this thing to harvest. Good luck.

Put a piece of white paper under the plant and knock the leaves around a bit. If there are black specs on the paper it's mites. Sure looks like mites.

the soil seems hot and probably ph is off

onegreenthumb said:

the soil seems hot and probably ph is off

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Something about that soil and ph is BUGGING me lol.

CannaCountry said:

You're long on mites and maybe a bit short on Ca. At 7 weeks in, you're best bet is to mitigate the pests, forget about the Ca and get this thing to harvest. Good luck.

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I’ve just checked for webs and tried the paper thing too and I can’t seem to find them anywhere on the affected plant... the white dots you see is diatomaceous earth that was dilluted into water then sprayed 2 weeks ago

Here’s a pics of the worst leaf I removed

mitchthegrower said:

I’ve just checked for webs and tried the paper thing too and I can’t seem to find them anywhere on the affected plant... the white dots you see is diatomaceous earth that was dilluted into water then sprayed 2 weeks ago

Here’s a pics of the worst leaf I removed

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Ah ha! Are you sure that's a spray? can you wipe those white dots off? Because like everybody said it looks like classic mite damage, unless you can wipe it off??

Edit: if that is a spray you just dodged a big mess mitch! Good luck

Beachwalker said:

Ah ha! Are you sure that's a spray? can you wipe those white dots off? Because like everybody said it looks like classic mite damage, unless you can wipe it off??

Edit: if that is a spray you just dodged a big thing mitch! Good luck

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It isn’t the spray you are right, I just found out leaves that had almost none of the spray on it and the back part of them seems infested with white eggs...

I will be giving a last treatment shot of diatomaceous earth, cayenne pepper and soap... hopefully it will slow the mites until I yield in 6 days

How can I avoid those in the future other than my pre-treatment plan, cleanliness and not underwatering?

mitchthegrower said:

It isn’t the spray you are right, I just found out leaves that had almost none of the spray on it and the back part of them seems infested with white eggs...

I will be giving a last treatment shot of diatomaceous earth, cayenne pepper and soap... hopefully it will slow the mites until I yield in 6 days

How can I avoid those in the future other than my pre-treatment plan, cleanliness and not underwatering?

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If you're harvesting in 6 days, do yourself and your lungs a favor....don't spray them with anything. Chalk it up to an experience and move forward. Good luck

CannaCountry said:

If you're harvesting in 6 days, do yourself and your lungs a favor....don't spray them with anything. Chalk it up to an experience and move forward. Good luck

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Yeah just a waste of time spraying them right now, I started harvesting yesterday I just finished trimming the worst plant so the others should be just fine by the end of the week...

But anyway spraying or not, before I trim I wash them in a water bath for 5 minutes to remove excess of everything

I'm chicken sh@t when it comes to the washing...I know lots do it, but damn...I guess you can't teach old dogs...haha.

Have a great weekend.

CannaCountry said:

I'm chicken sh@t when it comes to the washing...I know lots do it, but damn...I guess you can't teach old dogs...haha.

Have a great weekend.

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Well water can’t remove trichomes since it’s not fat or alcohol, but yeah many people seem afraid to do it haha

Thanks, to you too