Theophrast über Pflanzenkrankheiten. Ein Beitrag zur Geschichte der Phytopathologie in der Antike

Already before Theophrastus there was a botanical literature which also dealt with the diseases of plants, but we have only indirectly access to it — mainly by way of Theophrastus. The botanical excursus of the Hippocratic series of writings De genitura, De natura pueri, De morbis IV, which attributes the health of plants to a balance of warmth and cold and a correct quantity of specific humidity, forms an exception. This excursus hints at what is more fully developed in Theophrastus discussion of the diseases of plants: The diseases of plants are understood in close analogy to those of animals or human beings. In both cases, a basic distinction is made between inner, dietetic diseases and outer, traumatic ones. According to Theophrastus, especially humidity and an innate warmth are life-sustaining factors. A disturbance of the natural humidity/warmth-household must be counteracted by respective measures. As far as the terminology of plant diseases is concerned, Theophrastus relies on already existing concepts. Classical literature after Theophrastus has made no substantial contributions to phytopathology.     

Etappen auf dem Weg zu einer Geschichte der Pflanzenzüchtung. Überlegungen aus Anlaß eines Buches von Thomas Wieland

Thomas Wieland's book is the first survey on the history of scientific plant breeding in Germany from 1889 to 1945. There are two mainlines of analysis: (1) The transformation of an agricultural practise of peasants into an academic discipline of scientists and (2) the importance of political arguments for this process of scientification. Most of the time Wieland's methods to present his thesis are exemplary: either as biographies or as breeding project histories. So he can write about a great diversity of aspects; but from his point of view – the discipline history as applied science – he cannot show the great importance of economic forces controlling plant breeding. This short article will not diminish the high value of Wieland's book. My aim is only to outline some desiderata for a history of plant breeding which is not yet written.     

Globaler Pflanzentransfer und seine Transferinstanzen als Kultur‐, Wissens‐ und Wissenschaftstransfer der frühen Neuzeit

In three steps, the polyvalent phenomenon of global plant transfer will be analysed. Starting from the model of cultural transfer, the latter one will be discussed in combination with network research. Finally, the connection of various instances of transfer such as botanical gardens, ships and islands will be established. The fact that botanists take part in the process of transfer increasingly and from the middle of the 18th century onwards control the plant transfers in all phases emphasises the entwinement of science and colonialism.