A friend recently had an outbreak of spidermite on his seedlings, grown in compost, he sprayed using an insectocide made for edible crops which cleared them up. However since spraying the leaves have developed yellow circlular patches. Both still new to growing so would be gratefull for any advice on this.

Thanx

Did the liquid puddle on the leaves?

Perhaps burn from the liquid acting like a magnifying glass.

Just a guess

If you can post a pic, I'm sure some of the experts here will be able to give a firm answer

Good luck

It's probably caused by the oils used in certain organic products - as long as the plant doesn't get a heavy coating of this which would kill it, there ain't owt to worry about. If need be gently wash any oily residues off with water

Thanx for the help so far will try to get a pic and post it.