Swiss chard experiment: Are the leaf miners finished with laying eggs for the year?

Today I removed all of the miner-affected leaves of the swiss chard (all of which has been uncovered for a while).  The central bed, which as been uncovered the longest, had a lot of badly affected leaves, but also some untouched leaves which don't even have eggs on them.

So anyway, I will see now whether more miner eggs appear and more leaf damage.