Hello! First time poster on this forum and looking to get some help with my orange tree. I am not sure what type it is, but has appeared seriously unhealthy and deteriorating since we moved in to this house 3 years ago. I am in Phoenix, so there is both extreme heat and near freezing cold for short bursts of time in the winter. It is planted on a slope, which I am sure does not help the deep watering desired, but nonetheless I would prefer for healthy growth and edible fruit. I have posted some pictures below of fruit and leaves and am hoping I can get advice on pests and nutrient deficiencies to attempt to address. The new growth appears to be all pale yellow with some remaining healthy green foliage toward the bottom. The rest is yellow and green with the yellow appearing toward the leaf ends with some browned tips. Of course, this is in addition to the leaves being eaten by "something" and the fruit very bumpy and discolored...
HELP! 
