398 Diseases of Greenhouse Crops 



"Do not fumigate plants in a greenhouse in day- 

 light. 



"Do not fumigate when the temperature in the 

 greenhouse is below 52 degrees or above 70 degrees F. 



"Do not leave the chemicals within reach of those 

 unacquainted with their poisonous nature. Always 

 have them properly labeled. 



"Do not handle the chemicals any more than is 

 absolutely necessar5^ It is well to have a pair of 

 old gloves for this, and to use them for no other 

 purpose. Always wash the hands thoroughly after 

 handling the chemicals whether gloves have been 

 used or not. 



"Do not allow the acid to splash or drop on the 

 clothing or skin. 



"Do not stay in the greenhouse any longer than is 

 necessary to place the cyanid in the jars, and never 

 enter a greenhouse charged with the gas until it has 

 been thoroughly aired. 



"Do not fail to post danger signs at all entrances 

 before setting off the charge, and to see that the 

 greenhouse is closed tightly. 



"Do not attempt to fumigate a large greenhouse 

 alone. 



"Do not fumigate a greenhouse adjoining a dwell- 

 ing without notifying the occupants before fumi- 

 gation. 



"Do not pour water on the acid; pour acid on the 

 water. 



"Do not become negligent in any of the precau- 

 tions; to do so may cause serious results." 



