I have a brownish sponge-like substance on my sago palm. Is this normal?
Brownish Sponge Like Substance on My Sago Palm
Although scale is not generally "sponge like", it is the only thing I can think of. This article should help: https://www.gardeningknowhow.com/plant-problems/pests/scale-bug-how-to-control-plant-scale.htm
Feel free to send in more details.