Dear Hortense answers a question about bulbils

Dear Hortense Hoelove,

What is wrong with my lily plant?  It has these brownish-black "things" growing in the leaf axils. Is it a disease? Is it large insect frass? What should I do? What spray should I get?

Signed,
Lily Nervousgardener

Dear Ms. Nervousgardener,

If you reach for a spray, which I assume is your word for "pesticide", I shall never answer your gardening questions ever again.