Hhhhmmm you could try scraping those things off with a razor ...then clean the stem with one and a half table spoons of hydrogen peroxide ...apply it about 3 times up and down the stalk with a paint brush or somthing alike let it dry out between each application
thanks mahn.....also i was walking near a wooded area were i have had outdoor plants before and there was a biker who got off his bike and went up this foot path...i had a suspision but continued walking past him...on my way back i went and check out this path...i turned a corner to a large open...