Beran, F. 1940a Zur Frage der insektiziden Wirksamkeit von Obstbaumkarbolineum emulgiert. [About the effectiveness of emulsified creosote insecticides on fruit trees.]. Nachrichtenblatt für den Deutschen Pflanzenschutzdienst. Berlin 20(7): 33-35.

Notes: Experiments were conducted with various concentrations of two kinds of insecticide emulsions against Aspidiotus perniciosus. The results showed that emulsified fruit tree creosote was much less effective than fruit tree creosote gained from heavy and middle fuel oil, and chemical tar oil emulsions are more effective than mechanical emulsions. Other experiments showed similar results against Epidiaspis leperei and Aspidiotus ostreiformis. Eulecanium cori is also mentioned.