ECONOMIC VALUE OP FUMIGATION 241 



this was for the ordinary greenhouse inse<5l pests. I 

 have never fumigated nursery stock or trees that had 

 the San Jose scale with hydrocyanic acid gas and then 

 made careful tests to see if all scales were killed, and 

 hence I can not speak on that point. Several mills in 

 this state have been fumigated with this gas, and with 

 success, but it is difficult to get the mills aired out 

 properly without danger, unless special arrangements 

 be made to do this from the outside. This state has 

 no fumigation laws, and probably will not for some 

 time. We have only just succeeded in getting a law 

 passed requiring stock entering the state to bear certi- 

 ficate of inspection. Prof. J. M. STEADMAN, Univer- 

 sity of Missouri. 



Nebraska fumigates doubtful stock. Although we 

 have done comparatively little in the way of using 

 hydrocyanic acid gas for the purpose of fumigating 

 nursery stock, a little has been done in this direction, 

 chiefly by our nurserymen when they receive stock 

 from abroad about which they feel a little dubious. 

 Prof. LAWRENCE BRUNER, University of Nebraska. 



North Carolina. I think that it is only a question 

 of a very short time before fumigation will be one of 

 the regular operations of the nurseryman. Where 

 there are great interests at stake, I do not think that 

 laws compelling fumigation are out of place but 

 rather a necessity. Most people are too much inclined 

 to look upon fumigation requirements only with 

 reference to San Jose scale. It seems to me that it is 

 equally fatal to other insects, and it cannot fail to be 

 of very great benefit to the fruit grower. The cost of 



