Just throwing this in here for good measure, as I had a lemon tree once that got scale bugs on it and it killed it. Wish I had known this then! I read somewhere where coffee grounds repel scale bugs. That some palm nursery in Florida discovered this quite by accident when they began using coffee grounds as mulch and were gathering them free from local cafés and began to notice that the plants they had mulched with coffee had no problems ever with scale while others would get problems. So they began to experiment with it and eventually realized the coffee grounds kept the scale bugs away. I have used coffee around my sago palm ever since as well as lots of other plants. I save all my coffee grounds.
