I've noticed clusters of eggs on the underside of my spinach leaves
(outdoors in growbags). The eggs are white, elongated cigar-shaped and
clustered together, about 5 per cluster, small but clearly visible. Does
anyone know what they are and what I should do to get rid of them? I'm not
averse to using chemicals, although obviously I'd prefer not to.

I also noticed markings on the leaves like leaf miner. Could that be the
problem? I don't know what leaf miners look like.

Now I know why I prefer buying veggies from the supermarket --- I don't see
the ikky creepies lurking on the leaves!!

Thanks.