Answer: Based on your description it's a bit difficult to make a guess as to what happened, however if you are using a watering system it is possible the plant did not receive adequate water since it is at the end of the row. To check if it is dead or not (to be honest I suspect it is) start at the tip of the cane and begin cutting it off. Look inside for a green layer, if you don't see any green then cut off a bit more and work your way back to ground level. (Removing dead cane material will not hurt the plant in any way.) If the roots are alive they will send up new canes eventually, so if you think there is still hope be sure to continue to water it regularly just as you do the others.
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