VEGETABLE DISEASE S- 



i ROUXD TABLE 



203 



Dr. Reddick: The black cloud was composed of great quantities 

 of fungous spores. If you have an enormous quantity of spores 

 developed there might be enough to make a cloud. 



SPRAYING ONIONS 



Mr. Greffrath: Has anybody successfully sprayed onions? 



Mr. Stewart: I don't know much about that. 



Dr. Reddick: Professor Whetzel thought he got some results in 

 onion spraying some years ago. Last summer we used a number of 

 dust mixtures on onions. We put some on so that the leaves were 

 thoroughly coated with the mixture. Yet when the next big rain 

 came, it probably washed the dust off, and we got a tremendous 

 infection. Effective dusting would be the ideal way to handle onion 

 spraying. 



Mr. Greffrath: Do you think it would stick as well as the 

 bordeaux if properly applied? 



Dr. Reddick: The difficulty in applying a liquid spray in an 

 onion field almost makes that out of the question. 



Mr. Greffrath: That is a thing I found several years ago. I 

 had been trying to spray onions. I made up my mind I was going to 

 have some way of spraying onions the next year. I took the matter 

 up with spray apparatus manufacturers, and investigated power 

 machines that would run a large number of nozzles. They were all 

 too hea^y and clumsy. I am now having a rig made by the E. C. 

 Brown people of Rochester. This will be drawn by two horses and 

 will hold one hundred fifty gallons of mixture. I am having pumps 

 put on it large enough so that it will deliver mixture enough through 

 eighteen nozzles at one hundred fifty pounds pressure. These nozzles 

 will be extended over a boom. This rig is suspended on two wheels. 

 As my beds are in narrow strips seventy -five feet wide, I am going to 

 plant two rows of celery, and divide my onion bed into three sections. 

 The beds will be one hundred twenty rods long. My plan would be to 

 plant a late variety of celery after the onions were well established. I 

 would straddle the row with my machine. There will be onions on 

 each side. Going down and back, everything will be covered except 

 the outside. In order to spray that, I disconnect the pump and 

 attach it on the other side. I believe if I can get a mixture that will 

 make that bordeaux stick on onions, by setting my nozzles right, I 

 ought to cover every part of the onions thoroughly. 



