I noticed yesterday that the new ground cover was covered with a sticky white substance. There was a black worm on each plant (2 plants); in fact there was more than one worm on each plant. I used soapy water to remove the white stuff and the worms. I looked this morning, and it looks like one of the plants have a little white stuff on them. I don't know if the worms are back or how much more it will cover the plants. What should I do?? Kathie
Treat the plants with Neem Oil.
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm