Garden Pests and Diseases: on pumpkin: trail or eggs?, 2 by rden

rden wrote:
This is on a pumpkin plant, northern hemisphere October (autumn). It occurred during the night, for sure. Thought it might be a slug trail, but haven\'t seen any since spring and I would think that it is too cold for them. It is mating season for grasshoppers, and I\'ve seen some of those around.
It appears on a couple of leaves, and also on a upper stem of the plant. Could it be the eggs of some moth, perhaps?