Carrot Fly (perhaps?) near seedlings - too late for nematodes?

[cazp]

There was a small rust coloured fly sitting on a kale plant near my carrot/parsnip seedlings this morning. I suspect it's a carrot Fly - if so it will be a bit annoying as the this is on a small raised bed which is covered with a fitted enviromesh cover which is only lifted when I water or weed.

My carrot and parsnip seedlings which were thinned only yesterday and have only just developed their first true leaves. So at the moment there isn't much for a maggot to burrow in to.

Is it too late to apply the nematode for carrot fly? it could be delivered in about 10 days.

[Martin H]

Carrot flies are black, so the insect you saw probably wasn't one. There's a pic on wikipedia: https://en.wikipedia.org/wiki/Carrot_fly

Can't help with nematode advice, I use netting.

[planetologist]

I only weed my carrots while it rains.
Sorry, I've never tried nematodes.