ECONOMIC VALUE OF FUMIGATION 239 



as I know. Prof. J. M. ALDRICH, University of 

 Idaho. 



Louisiana. We are much interested in the use 

 of this gas. Some fumigation of orange trees was 

 made a few years ago, as noted in a special bulletin 

 from the Louisiana Kxperiment Station entitled, ' ' In- 

 sects of Orange." We have used hydrocj^anic acid 

 gas with good results for the cow-pea or bean weevil. 

 The cow-peas were stored in a closed room and the 

 amount of cyanide used was according to your own 

 formula. We have arranged to fumigate plants com- 

 ing into Louisiana, and it is our intention to use the 

 gas much more extensively. Prof. H. A. MORGAN, 

 Entomologist Louisiana Experiment Station. 



Massachusetts. My candid opinion as to the effi- 

 ciency of the gas method for the destruction of insects 

 is that it should be much more widely used, but only 

 by experienced hands. I believe it to be available for 

 the fumigation of greenhouses, warehouses, and other 

 places, but do not believe in its use where carbon bisul- 

 phide will do the work, considering the latter to be 

 safer. The Kxperiment Station is strongly in favor of 

 fumigation, but in the absence of any law on the sub- 

 ject can only make use of moral suasion. DR. H. T. 

 FERNALD, Associate Entomologist, Hatch Experiment 

 Station, Massachusetts. 



In Michigan cheap and reliable. We now have 

 excellent spraying laws and others, requiring the 

 inspection of nurseries and orchards for San Jose scale 

 and other dangerous insects and diseases, but it has not 

 been found necessary to require the fumigation of all 



