Julius Theodor Christian Ratzeburg

Julius Theodor Christian Ratzeburg (16 February 1801– 24 October 1871) was a German zoologist, botanist,  entomologist, and forester.

Biography
Ratzeburg was born in Berlin, the son of a professor at the veterinary school of the University of Berlin. He studied medicine and natural sciences in Berlin and was primarily interested in botany. He became a private lecturer at the University of Berlin in 1828, when he was in contact with Alexander and Wilhelm von Humboldt. Two years later, he became professor of natural history there at the invitation of Friedrich Wilhelm Leopold Pfeil (1783-1859). He founded the botanic garden of forestry at Eberswalde, working there until his retirement in 1869. He returned to Berlin, where he resided until his death.

Ratzeburg was the author of important works on forestry and forest entomology, and is considered the founder of the latter discipline. He was notably interested in parasitic species. From 1827 to 1834, he wrote Medizinische Zoologie (Medical zoology) with Johann Friedrich von Brandt, which was a standard work for many years.

Selected works

Entomological works 

 Die Forstinsekten, Berlin 1837–1844, three volumes and a supplement.; re-edition at Vienna 1885.
 Die Waldverderber und ihre Feinde, Berlin, 1841, 8th re-edition of  Johann Friedrich Judeich (1828–1894)  and Hinrich Nitsche (1845–1902)  under the title Lehrbuch der mitteleuropäischen Insektenkunde, Vienna, 1885,  with a biography.
 Die Ichneumonen der Forstinsekten, Berlin 1844–1852,  three volumes. The parts are:
 Ratzeburg, J.T.C. 1844 (March 31), Die Ichneumonen der Forstinsekten in entomologischer und forstlicher Beziehung 1:224pp, 4 plates', Berlin.
 Ratzeburg, J.T.C. 1844 (August 31), Die Ichneumonen der Forstinsekten in entomologischer und forstlicher Beziehung 3:viii+314pp, 16 plates, Berlin
 Ratzeburg, J.T.C. 1848, Die Ichneumonen der Forstinsekten in entomologischer und forstlicher Beziehung 2:vi+238pp, 4 tables, 3 plates, Berlin
 Ratzeburg, J.T.C. 1852, Die Ichneumonen der Forstinsekten in entomologischer und forstlicher Beziehung 3:v–xviii+272pp, 3 tables, Berlin
 Die Nachkrankheiten und die Reproduktion der Kiefer nach dem Fraß der Forleule, Berlin, 1862.
 Die Waldverderbnis oder dauernder Schaden, welcher durch Insektenfraß, Schälen etc. an lebenden Waldbäumen entsteht, Berlin, 1866–1868, two volumes.

Other subjects 
 Handbuch der Zoopharmakologie für Thierärzte . Vol. 1&2 . Berlin 1801 Digital edition by the University and State Library Düsseldorf
 Medizinische Zoologie, avec Brandt, Berlin, 1827–1834, two volumes.
 Abbildung und Beschreibung der in Deutschland wild wachsenden Giftgewächse, with Johann Friedrich von Brandt (1802-1879) and Philipp Phoebus (1804-1880), Berlin 1834; new edition in 1838.
 Forstnaturwissenschaftliche Reisen, Berlin 1842.
 Die Standortsgewächse und Unkräuter Deutschlands, Berlin 1859.
 Forstwissenschaftliches Schriftstellerlexikon, Berlin 1872–1873.

In addition, Julius Theodor Christian Ratzeburg continued Friedrich Gottlob Hayne's work Getreue Darstellung und Beschreibung der in der Arzneykunde gebräuchlichen Gewächse.
 Getreue Darstellung und Beschreibung der in der Arzneykunde gebräuchlichen Gewächse wie auch solcher, welche mit ihnen verwechselt werden können. 12 Volumes, 1805–1856 (continued from Johann Friedrich Brandt, Julius Theodor Christian Ratzeburg und Johann Friedrich Klotzsch). Digital Edition by the University and State Library Düsseldorf

Notes

References 
The major portion of this article was translated from French Wikipedia (visited 27 January 2006).

External links

 Die Schädlinge des Waldes, Insekten und andere Tiere, inclusive 33 farbigen Tafeln pdf download

German taxonomists
1801 births
1871 deaths
German entomologists
Forestry academics
Academic staff of the Eberswalde University for Sustainable Development
Scientists from Berlin
People from the Margraviate of Brandenburg
19th-century German zoologists
Academic staff of the Humboldt University of Berlin
Members of the Russian Academy of Sciences
Members of the German National Academy of Sciences Leopoldina