Potter, D.A., Jensen, M.P., & Gordon, F.C. 1989 Phenology and degree-day relationships of the obscure scale (Homoptera: Diaspididae) and associated parasites on pin oak in Kentucky.. Journal of Economic Entomology 82(2): 551-55.

Notes: Abstract: Seasonal phenology of Melanaspis obscura monitored for 4 years on Quercus palustris; biology; parasites and one hyperparasite reared from infested twig samples; chemical control. Keywords: biology; biological control.