Are these spider mites?

Hey everyone, I seem to be having some issues with my plants and I'm not 100% sure if it's spider mites or not. I started with 10 GH Sweet Mango seeds and was gonna have myself a little outdoor grow supplemented with a 200w sun blaster on the cooler days to ensure I'm getting my 18/4. Of the 10 seeds only 3 became viable plants. (Worst germination rate ever!) Any how things were looking good until Wednesday when I noticed black looking spots showing up on some of my big fan leaves, by today (Fri) those leaves are yellowing and curling. We're having a super hot streak so at first I thought it was too warm for them so I brought them back inside to the and put them under the lights with some good ventilation and in the mean time picked up a new scope. After trimming some of the nasty stuff off I had a look and I'm not encouraged by what I found. If you can look at the pics and provide any advice I'd sure appreciate it. If it is mites I can't be sure if it came on some used equipment I picked up or if it came on some of the green house plants my wife brought into the yard. Pics will go in order from Wednesday to tonight.

Looks like it could use some CalMag and nitrogen IMO... Kinda looks like black spot fungus in one pic which can happen with extreme temperature and humidity fluctuations ive read... But I could be completely wrong about the fungus...

Not mites

I'm relieved to hear that it's not mites, not so happy to hear it may be fungus. I have given them cal/mag already, actually on the day these spots appeared, I'm using the general organics complete line. The temps for these guys has been held steady when they're inside and during dark hours, the only fluctuations they'd get is when it gets hit during the day when they're outside then it'd be back to 20-25c inside. In any event thanks a bunch for the help guys, should I plan to keep cutting off all the leaves that show that problem?

Med4us said:

I'm relieved to hear that it's not mites, not so happy to hear it may be fungus. I have given them cal/mag already, actually on the day these spots appeared, I'm using the general organics complete line. The temps for these guys has been held steady when they're inside and during dark hours, the only fluctuations they'd get is when it gets hit during the day when they're outside then it'd be back to 20-25c inside. In any event thanks a bunch for the help guys, should I plan to keep cutting off all the leaves that show that problem?

Click to expand...

You are using General Organics in your res?

I would swap over to General Hydroponics for DWC. I used to use GO for DWC and it always gave me problems... Bugs... pH issues.. Deficiencies, burns and lock outs. The GO lineup is not meant to be completely water soluble. You are better off using it in a soil or coco media, this is where you will achieve the nutrients full potential.

Now I'm not saying it will not work for you because it may... I was able to get a couple grows out of the lineup in DWC but nothing that was ever very rewarding. I now run GO's entire line with a mix of Mother Earth coco and hydroton and my cherry og is loving every drop of it!

This is a soil grow, using sunshine #4 mix soil with hydroton balls in the bottom of my pot to aid drainage. Currently plants are in a 1 ga pot and will soon be moving to a 5ga pot. I'm partially thinking the strain is the problem as it seems there have been little issues since germination with this run.

I don't know much about the sweet mango strain but I remember the old mango seeds and it was a very hearty plant and forgiving on beginners...

This is exactly what is happening to mine I think.
Do the bugs move and can they fly at all?
My discolouration is almost identical to yours

I don't know much about them to be honest, but I don't believe spider mites can fly. I thought the things in the magnified pic above looked like a larvae of some sort but it sounds like it may be fungus. I will be cutting off all affected leaves when I get home later and maybe misting with a peroxide solution.

UPDATE; After getting home I went to town cutting off anything with brown spots, turns out the things in my pic were larvae after all. Or it's just a coincidence that I found some type of beatles or aphids on the girls. See new pics. Can anyone ID these?

What is your soil PH ?very important. What is the soil runoff PH? What is the diff between the two? I bet your PH at the roots is to low causing all your problems? I hope this helps good luck Oh and Welcome!

My soil was 7 to start, added h2o with a ph of 6 prior to transplanting but have since stopped ph'ing as the general organics line says not to ph or you kill the beneficial stuff. Any idea what the bugs in the last pics are? Are they a known pest or just a coincidence?