What’s That Black Stuff on My Plant? by Teresa O'Reilly Posted: October 31, 2018 Leave a Comment A common question that UF IFAS Extension Services answers for residents of Flagler is, what is causing a black, soot like substance to accumulate on plant leaves. To get to the answer it may be… Read More Category: Florida-Friendly Landscaping, Home Landscapes, Pests & Disease, Uncategorized Tags: aphids, plants