Hee hee. I dont have them this year,,well maybe a very few. I honestly not sure but to tell you the truth i looked at it too and I think might have been fly poop! I saw this weird looking fly on my plant this year kinda had brownish line on it, I was looking at it and poof i saw a black spot appear as it flew off. Heck I dont know I searched for that answer for 3 months never got one till just this month over a year later. So this year i got yellow leaves and dropping off like person said but no black dots..go figure
<<<smacks head>>>