Can aloe ver leaves or gel be used as a fertiliser or fungicide/pesticide for other plants?
Aloe Vera as Fertiliser?
Here is a record of experiment to determine fungicidal properties of aloe vera: http://nopr.niscair.res.in/bitstream/123456789/8112/1/NPR%204(4)%20289-289.pdf
In many parts of the world aloe is used as a cure for a vast array of maladies, so there may be uses as pesticide, also. And of course, if you compost it, it then becomes fertilizer.