10 OLAV JOHAN-OLSEN. M.-N. Kl. 
United States Department of Agriculture 
Division of Entomology, Washington D. C. 
January 19, 1903. 
My dear Sir. 
Your letter of the ızth of November addressed to Prof. T. J. Burrill, 
of the University of Illinois, has been referred by Prof. Burrill to this 
office for further attention. I regret to state that we have no fungous 
diseases which are at all likely to be efficacious in your country, and which 
we can send you for experimental work. The experiments which have 
been made in this country have had little or no practical value. 
Believe me, my dear sir, 
Yours very truly 
L. O. Howard. 
Dr. Olav Johan-Olsen. 
Kap Gjæringsfysiologiske Laboratorium. 
Kap, Norway. 
College of Agriculture and Agricultural Experiment Station, 
University of Illinois. 
Adress, Urbana or Champaign Illinois, U. S. A. 
January 13. 1903. 
Dr. Olav Johan-Olsen. 
Kap, Norway. 
Dear Sir. 
Replying to yours of December 11 I will say that I have not at 
present any living cultures of the fungicides with which I at one time 
made experiments in killing insects. 
I have also consulted Professor S. A. Forbes, State Entomologist of 
Illinois, who has done much more in this line than I have and find that 
he has no living material. 
The results of both our experiments were not very satisfactory, 
except in the case of the cabbage worm, not tried upon caterpillars. 
Much more work was done in trying to kill the small bug destructive 
to wheal, called in this country chinch bug (Blissus leucopterus). 
In all of the experiments the weather conditions seemed largely to 
determine the rapidity of the contagion and as these could not at all 
be foretold. 
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