guys can someone please tell me what this is for def .an how to sort it would be nice cheers all leepyClick to view attachmentan its not a mite problem im thinkin LSF but not 100%sure

Looks like LSF to me, lots going about just now

nice one for that matey do you no how to get shut of it mate

anyone

Nevermind one leaf, what's the rest of the plant looking like?

Can you show a pic of the whole plant?Was that a base fan leaf or middle fan leaf?

the lights arnt on till 7 but the whole plant has got spots but no were near as bad as these an its seemed to happern over the space of 3days as soon as the lights are on ill put up a pic

Soil or hydro?

sorry mate never thought to add that the one with the spots is in soil b&q specilist compost BUT i have one in coco that ant got any of these spots

Ph imbalance in the soil = nutrient lockout

Calcium by its looks.

Stick your hand in and drag out some soil.Add an equal amount of RO water or similar(0 ppm)

Check Ph and PPM.

Same problem as me , lil brown/yellow spots develping into,,,, leaf burnout / curl / death / distruction / mahem / , mine are also in b and q soil , but the bottom of the range gear .

well i thought soil was self balanceing

gotta say that looks like lsf to me mate

Yes it should be.

It looks just like I've got, and I reckon it's LSF. I've sprayed with Citrofresh and home made Garlic Spray and I reckon they've both prevented it getting worse, but not eradicated it. I've only got a week at most to go so I'm not too worried.

If you do think it's LSF one of the "thanes" is safe...can't remember which one though

Copper fungicides, like Bordeaux Mixture, are a good treatment for LSF, IIRC.

what is lsf someone? RK

LSF = Leaf Spot Fungus.

if it is fungal (certainly looks like it) remove as much of the affected fan leaves as you can. this should help to stop it spreading. what's your extraction like?
citrofresh and garlic sprays will also help and wouldn't harm (unless you're late in flowering).