SOIL Strange white/gray stains on weed leafs.

[sanjamaica]

Good night! Could you help me? I have a problem with my plants, during the fourth week of vegetation, these gray stains appear, just on the side of the leafs. After a while it turns yellow and dries the leaf, as seen in the photos. Search for several photos, no one is the same. The most similar are: Leaf Miner (Liriomyza trifolii). Absence of phosphorus. Fungus Fusarium.
Should I cut the affected leaves?
PS: Indoor cultivation. 200w Led light. Using Top Veg. Suelo Carolina (peat, vermiculite, organic residue and NPK, perlite)

thanks

[Tersky]

I would say it looks like ph or root issue. What is ph of water you use? How often do you water? I wouldnt recommend anything with vermiculite as it retains water where as perlite allows for soil aeration and drainage.

[sanjamaica]

Yeah, now i cant know the ph of soil, or the water used. Im saving money for buying the PH measurer.

About how often, i stick a stick (hehe) on the end of the vase to see how dry the soil is. Usually i water the soil with 350/ml each 3 days.

7 liter vase (those thin long ones)

[Tersky]

This is less than $15 and i still use it

https://www.amazon.com/General-Hydroponics-Test-Kit-1-Ounce/dp/B000BT32UA/ref=pd_sim_86_2/140-2129147-1621636?_encoding=UTF8&pd_rd_i=B000BT32UA&pd_rd_r=0aff628c-731c-4d23-813a-4c7b1451ac4c&pd_rd_w=Lu57b&pd_rd_wg=gB78x&pf_rd_p=64e5d61b-7067-445e-bd1c-f84491d96b7e&pf_rd_r=YPX3N15XSYYWE9N3M46Y&psc=1&refRID=YPX3N15XSYYWE9N3M46Y

A ph pen is not much more at $40

https://www.amazon.com/gp/product/B0096N8OWI/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Your issue must be ph or root related as you need to have it in ph range for pants to be healthy unless you are using living soil. I have had leaf miners and it looks nothing like this. Also water when pot is light, dont keep sticking things in soil to test wetness as it can kill roots.

[CaptainWiese91]

First picture I agree with tersky. PH or a root problem.
but the second lasts looks like leaf miner to me.

[sanjamaica]

Yeah, now i cant know the ph of soil, or the water used. Im saving money for buying the PH measurer.

About the first picture, it started as the other pictures with the white stuff and then became this "yellow dry rotten" stuff.

Yeah, im thinking also on the leaf miner, but what i think its od, when i search for this leaf miner problem, all the pictures show the leaf with this same white appearance, but not in a white stain, but on a white trail.

[Tersky]

I have leaf miners on my tomato plants outside and to me it looks nothing like this. The trail is more white and random rather than having splotches. I could be wrong but just looks like ph or root to me.

[CaptainWiese91]

Nevertheless.
Make a flush and secure the proper PH range.
I think you are right tersky