32 FUMIGATION OF APPLES FOR SAN JOSE SCALE. 



CONCLUSIONS AND RECOMMENDATIONS. 



The data presented point out, it is believed, the practicability of 

 destroying the San Jose scale on apples and suggests the desirability of 

 the adoption of the practice of fumigation by exporters if such treat- 

 ment will result in the acceptance by foreign countries of fruit so treated. 

 A certificate of proper fumigation on each barrel, box, or package 

 should constitute a sufficient guaranty that any scales present had 

 been killed. It is considered probable that, if desirable, fumigation 

 could be practiced in the case of numerous fruits, as pears, oranges, 

 lemons, etc. In fact, the writer understands that it has been the 

 practice of the California state board of horticulture to fumigate such 

 fruit when desirable during the past several years. 



In the fumigation of apples in barrels it would appear sufficient 

 to remove the upper head only, or to use for the original heading 

 boards with numerous f or 1 inch auger holes — a total of 15 or 20 

 at each end. Fruit packed in usual commercial boxes, wrapped or 

 unwrapped, would need no special preparation, as the openings 

 between the several slats would allow sufficient gas to enter. 



