Are these little white spots spider mite damage ? This is a photo seedling about 4 weeks. I've never had them before.
thanks
hey Vas!... no mites cause spots like that,... they start invasions on the undersides first, and the damage looks like a very fine silvery stippling, caused by zillions of micro-punctures from their damn filthy sucking parts! Very obvious and tell-tale, especially with a magnifier,... Those spots do look much like fine lensing burn caused by the sun (nice call guys-
),.... I think I see the dead zone is sunken in, right? Other possibilities include thrips ( typical of them to dine-and-shine, so may not be at the scene of the crime later!), but they usually don't cause the depressed spots, and look more patchy,... (look up the damage symptoms online for both vermins, and you'll see what I mean),.. and being OD's, you may have other larger vermin attack and leave as well, larger than thrips (typically very small, but not mite- small),.... but my first bet is on lensing burn,... nothing to do there, if it dew! no biggie,...just watch for further signs, to be sure it ain't vermins!
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This could be the beginning of cal mag def, keep an eye on it. Do you give them any cal mag ?
It also could be the ph issue, but my bet would be on cal mag.
The light green color of leaves and yellow spots on them .....