Blue Globe Spruce problem

Plant: Blue Globe Spruce

Symptoms: Needles losing color, die off in center of plant.

Suggested Problem(s):
a. spider mites.
b. chlorosis.
c. under-watering.

I called Arapahoe Acres today to ask if they had an insecticide for spider mites. The lady said they have miticide that doesn’t work very well and then asked if I know for sure if it is indeed mites.
I explained the arborist suggested it may be a problem and to do the paper test.
PAPER TEST: As mites can be too small to see with the naked eye, take a white piece of paper and shake a limb over the paper. If you see tiny specs they could be mites.

UPDATE 5/26/2010: I have added a tree spike for evergreens and have been watering more heavily. There is new growth now, but the color of the needles are the same.

An amateur gardener who loves to watch the garden grow.