I would check at your local pharmacy or medical supply location for plain old Epsom salt. The scent probably won't hurt the tree, but better to be safe. Also, the plain kind should be less expensive.
It would work, I wouldn't recommend anything scented though, as it may cause problems. Also, quick warning to be careful while drying, I'd say put the dryer on low or...
It's more of a repellent than a killer. Since I switched to lemon bleach cleaners, I've seen a drastic reduction in my unwanted visitors indoors. I also spray bleach around...
Add two tablespoons of Epsom salt to a gallon of water, and use tank sprayer to apply the mix once a month, substituting the spray for a regular watering. Use...
Yes, you can store an excess of the paste in the refrigerator. Unless you freeze it, I would use the refrigerated left-over paste within three to four days.
