defitnely eggs there,look them up and see what you got,looks like the damn things are trying to write there name on that one leaf,goggle garden pest and describe the egg and i bet you can find it,i would for sure scrap them bastards off and be careful not to get in your medium,they could be soil born,i have the same thing every year in my veggie garden,look just like those specks but smaller,a wasp like moth black and orange lay them on the leaves,first there is a black speck,look like dirt,next day they are orange,and then they disappear by boring into the vine,squash vine boer worms,nasty bastards,they will attack any hollow vine stalk ,never seen it on medicine though,so im doubting the same thing,not sure but look into catipillar eggs