No. 6. DEPARTMENT OF AGRICULTURE. 261 



tightly. The jar may be any glazed earthenware vessel, sufiQcientl} 

 hirge to hold double the amount of liquid necessary. This is to avoid 

 slopping or sputtering over, when the formation of the gas begins. 

 Fully dormant stock may be safely exposed one hour or more. Apple 

 and pear will stand a much longer period. Peach is most sensitive 

 and, if the exposure is to be a long one, the amount of material used 

 should be reduced one-fourth. At that strength a house may be 

 left closed all night. The essential points are an absolutely tight 

 house; the generator in the middle and a chance for the gas to reach 

 all parts of the room readil3\ 



It should be remembered that all the materials used to produce 

 this gas are violent poisons and the gas itself is extremely poisonous. 

 Care should be taken not to inhale any of it and, when the fumigat- 

 ing house is opened, this should be done from the outside in such 

 a v/ay as not to get the tirst whiff from within. The one needed 

 window should be opposite the door, and both doors and window 

 should be open for at least ten minutes before the house is entered. 



Infested stock thus fumigated has been planted out, closely watch- 

 ed and found free after three vears. The effect is absolute if the 

 work is well done and therefore it is well within the police power of 

 the State to require the nurseryman to erect and maintain a proper 

 fumigating plant, and to see that he understands its use. The 

 nurseryman should not be hampered in. his business more than is 

 absolutely necessary to protect his customer, and this is a limita- 

 tion that my experience with the trade leads me to believe will be 

 acceptable. 



FINALLY. 



While the San Jo^6 or Pernicious Scale is a most destructive insect, 

 it has its good side. Its advent has stimulated the horticulturist 

 to a closer study of his subject. It will drive out the incompetent 

 and unintelligent grow-er by killing his trees. It will tend to the 

 production of more limited crops of better fruit, for which better 

 prices may be obtained. 



And, after all, we can control the insect if we set out earnestly to 

 do it. If we cannot grow fruit without it, w^e can do so in spite of 

 it. It has been and is being done in New Jersey. 



