Customer planted 2 dwarf Alberta spruce in May. Observed what appeared to be evidence of a white scale on both. We're treated with an imidaclopryd root drench about a month ago. Still showing decline and lots of needle drop. One of the two almost looks dead. Have checked with the shake on paper method for mites etc but did not find anything. Any ideas? On some of the needles that are still green the tips are turning slightly white but no observed white spots on the rest of the length of the...
Spruce scale?
Spruce scale?