Leaf scorch has a narrow golden band in the leaf between the green basal tissue and the brown tip and the margin of the scorch is quite irregular. Salt burn usually has a distinct and regular margin between the green base and the brown, burnt tip of the leaf. Almond leaf scorch is more a curiosity than a threat to the industry, but it can cause significant tree losses in individual orchards with a variety such as Peerless. If you see trees which showed these symptoms in 1997, mark the trees and point them out to me. Several herbicides have some effectiveness in controlling nutsedge, but none are really good.
Frequent application is essential with the foliar applied herbicides.
If you allow the nutsedge to reach the 5th leaf stage it has produced another nut which will not be killed by the herbicide. Spraying is the only good alternative in the sprayed strip. Nutsedge loves weed-free middles because it is really not a good competitor. Plant a good, dense cover crop this fall, and next summer you will find that there will be much less nutsedge surviving. Over the years you can choke it out with a good cover.