What Are These White Egg Shaped Substances That Have Just Appeared On My Milk Weed Plants.

Question

The substances are too big for monarchs.

• 

Answer 1

It's out of focus right on those blobs, but they may be from spittlebugs. Here is more:

https://www.gardeningknowhow.com/plant-problems/pests/insects/spittlebug-control.htm