Rosemary with Foam on its Tips

I have a question about rosemary,there is some sort of white like foam on the tips of my rosemary plants and this morning I found that another plant opposite end also has it. WHAT can I do?

A spittle bug may have taken up residence in the soft new growth of your rosemary. Dig into the foam and see if you can find a tiny (since it must be newly hatched) worm-like grub in the center. Squoosh it!!
If the foam is dry, it may be some sort of fungal growth and suggestions for getting rid of it can be found on our web-page <www.richters.com>, Click on "Q&A", then on "Search Q&A", then type in "Rosemary" and click on all topics dealing with powdery mildew, etc. Best of luck!