m 



Mr. Dorph-Petersen: 

 "RemarJis on the Investigations of the Purity of Strain and 

 Freedom from Disease of Seed. 



Mr. President, Ladies and Gentlemen ! 



I greatly regret that I am called upon to present this subject. I was only prepared 

 to append a few remarks on the investigations we have made on the purity of strain 

 and freedom from disease of seed, while we had requested Oberregierungsrat Professor 

 Dr. Hiltner to tell us about the comprehensive investigations made by the „Bayrische 

 Landesanstalt fiirPflanzenbau undPflanzenschutz" on attacks of disease (especially Fusarium) 

 on seed. 



When I visited my very able colleague Oberregierungsrat Professor Dr. Hiltner in 

 April I found him full of interest in this congress and of anticipations of being present 

 and introducing this subject if his government so desired. 



Unfortunately Germany was late in deciding to participate. Not until May 30th 

 was I apprised that that nation would be represented by Oberregierungsrat Hiltner and 

 Professor Voigt. I telegraphed at once to Professor Hiltner bidding him welcome and 

 Asking him wether he would present this subject as we had requested. Unfortunately 

 enough, Professor Hiltner is not with us after all, and I have not received any answer 

 from him. We are therefore forced, to do without a very important contribution to this very 

 important question. I hope however, that many of the gentlemen here to day have 

 interesting observations to add to the comparatively meagre remarks I will make about 

 our investigations. 



I hope that Professor Voigt will tell us something about the investigations in Munich. 

 Besides what I saw and heard on this matter in Munich I know that there is much 

 of interest on this subject to be reported from Zurich and Wageningen. I hope that my 

 honoured colleagues Dr.Volkart and director Bruijning will take part in the discusision 

 and tell us of the investigations they have made. 



At both places germinated diseased grains and non-germinated diseased grains are 

 examined in order to diagnose the diseases by which they are attacked. This is a matter 

 of the very greatest importance. 



However the examination must be supplemented by field tests and before stating on 

 the analysis certificates that the sample is attacked by a disease, proof must be found 

 that it is a variety of said disease which is transmitted through the seed to the 

 growing plant — as stripe disease and smut — . We have therefore confined ourselves 

 to those varieties about which our knowledge is exact. 



Ladies and Gentlemen! 



Alter these few remarks in English I will repeat, what has been said in German 

 and then tell you about our own investigations. 



In the report of the subject*) which has been distributed, you will find a short 

 English summary and as there is no corresponding German summary, I will now use 

 that language. 



Mitteilungen iiber die Untersuchungen der SortenecMlieit und des Freiseins 

 von Pflanzenkrankheiten der Samenwaren. 



Meine Damen und Herren! 



Teh bedaure im hochsten Grade, dafi ich es heute bin,- der die Verhandlungen ein- 

 leitet, indem ich mich nur darauf vorbereitet hatte, einen kurzen Bericht liber die Unter- 

 suchungen auf dem Gebiet der Sorten- und Stammechtheit und des Freiseins von Krank- 



*) J. Holmgaard : "Unaers0gelser vedrarende Saasseds Sortsaegthed og Frihed for Brand og Stribesyge, 

 1917—1920" (Investigations on the Purity of Strain and Freedom from Burnt and Stripe Disease of Seed, 

 1917— W20) with an English Summary. 



