What's this?

[milkybardave]

.... and will it kill my peas?

[milkybardave]

[manicscousers]

I think it's called leaf miner, can't remember what to do..maybe someone else knows  ;D

[Rhubarb Thrasher]

yes think it's a vegetable leaf miner

http://www.bbc.co.uk/gardening/advice/pests_and_diseases/nonflash_index.shtml?leaf_miner_moths

something else for us to worry about

[Robert_Brenchley]

I don't think these do significant damage.

[milkybardave]

Thank goodness   :)  OH is really looking forward to picking and eating the peas (not sure they'll make it to table)  ;D

[mikedhart]

yep leaf miner. Will weaken plant a bit but no issue - can remove the affected leaves if you catch them early

[valmarg]

I agree with everybody, leaf miner.  If you turn the leaf over, you should see a little brown 'bulge' in the leaf.  That is the bug**r that has been doing all the mining.  Whilst I also agree that this is not one of the world's worst pests, if you squish the bug, it will prevent further bugs.

valmarg