Yellowing of top leaves and brownish spots

It looks like nitrogen toxicity. Grow nutrients should be cut back in flower. Auto's don't thrive on as many nutrients as photoperiods.

Look like they seeded and ripening and now uve drowned them in your flush

They are looking very seeded and not got a dairy for reference but if you have seeds then you will have to chop them all and clean everything before starting again

They are not looking good im afraid I think they are pollinated but check the calze for seeds

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Was from the pH but you are done bulking or right at done. Your plants are ripening.

You can see that I had a severe infestation. Because it developed so late in flowering, I tried to control it by spraying water under the leaves. The method worked well in controlling the population, but because I was spraying with tap water (ph 7+), I am thinking that the spraying led to a local increase in the pH at the leaves. Do you think that it is generally possible to alter the pH of the medium just by spraying water on top of the leaves?