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Soft white Cotten like substance growing only on cacti
South east florida
You might have noticed a strong red color if you rubbed on this scale...it was used for dye by the Aztec & Maya people.
Welcome to Project Noah from another Floridian.
They are messy. A good way to get rid of them is to repeatedly squirt them off the cactus with water.
That's a scale insect called Cochineal. Here's another spotting if it:
http://www.projectnoah.org/spottings/728...