Sarkisov, R.N., Sarkisian, S.M., & Mkrtchyan, L.P. 1980 [Dependence of biomass output of the Ararat cochineal on the collection method and the egg laying efficiency level of food plants.]. Biologicheskii Zhurnal Armenii 33: 995-997.

Notes: Porphyrophora hamelii; raising in greenhouse compared with natural plant infestation; temperature; nutrition.