July, 1914.] THE APPLE MAGGOT. 113 



likely to deteriorate rapidly. Development of the larvae pro- 

 ceeds, and in two or three weeks the apples may be practically 

 worthless. 



In 1909-1910 experiments were carried out to observe the 

 action of such fruit in cool and cold storage. 



Lot 1 consisted of a box of Baldwins, and was received at Dur- 

 ham October 29. The fruit was examined and repacked, infested 

 fruit in one side of the box and fruit approximately free from 

 punctures in the other side. The infested fruit seemed a little 

 less sound and hard than the other, although development of the 

 larvffi had not proceeded far. The repacked box was placed in 

 cold storage at 32 degrees November 2. It was removed from 

 storage February 10, and was placed in a basement room where 

 the temperature averaged 65 degrees. February 14 the fruit 

 was carefully examined. The condition of the apples had re- 

 mained essentialh^ unchanged. There was no excessive deteri- 

 oration of the infested fruit. 



Lot 2 was a box of Baldwins, and was examined and repacked 

 in the same manner as Lot 1. Some infestation existed in the 

 half supposed to contain apples free of the maggot. The apples 

 entered cold storage at 32 degrees November 17, and remained 

 until March 10. From March 11 to March 24 they were in the 

 basement room at a temperature averaging 65 degrees. In other 

 words they were given moderate warmth for two weeks following 

 storage. Examination at the end of this period showed for the 

 non-infested section 9 apples rotten and 58 fair; for the infested 

 section 44 apples rotten and 22 fair. 



Lot 3 consisted of Baldwins. The non-infested fruit was taken 

 November 16 from a barrel of apples in cellar storage. The 

 apples were sound but not very hard. The infested fruit came 

 from an orchard twenty miles away. These apples were more 

 ripe. Most of the larvae in them were quite small, but a few were 

 developing to larger size. Each lot was packed in a separate 

 box and placed November 16 in a refrigerator maintained at an 

 average temperature of 45 degrees. The apples were examined 

 January 15. Of the non-infested fruit 50 apples were sound, 5 

 fair and 2 rotten; of the infested fruit 32 apples were fair to poor, 

 13 were rotten. Rotten apples were removed and the fruit 

 replaced in the refrigerator. It was again examined February 



