220 



Maine Agricultural Experiment Station. 1917. 



During the picking of the crop one commercial grower, 

 sorted out the maggoty gooseberries. As the harvesting of the 

 crop extends over a period of several weeks, the daily destruction 

 of infested fruit by burning is not always a convenient method. 

 A number of experiments were performed to determine whether 

 a more simple means of destroying infested fruit could not be 

 adopted. 



To determine the number of larvae which would pupate 

 when maggoty fruit was submerged in water, infested currants 

 and gooseberries were placed in pans or pails of water. At the 

 end of one, two, three and four days, the fruit was removed 

 from the containers and placed on sand. The figures in table 

 21, indicate the number of larvae which pupated. 



TABLE 21. 



Number of Larvae Which Pupated After Infested Fruit was 

 Submerged in Water for a Period of One to Four Days. 



Quantity of 



Days 



Number 



infested 



submerged 



larvae 



fruit 



in water 



pupated 



Currants 







100 



1 



15 



100 



2 



8 



100 



3 







100 



4 







Gooseberries 







100 



1 



1 



100 



2 







100 



3 







100 



i 







1 qt. 



1 



45 



1 qt. 



2 



39 



1 qt. 



3 







1 qt. 



4 







As all of the maggots in the infested currants and goose- 

 berries used in the previous experiment w^ere immature at the 

 time that the fruit was emersed in water, another experiment 

 was performed to determine the number of mature larvae which 

 would pupate when submerged in pans of water. At the end of 

 one, two, three and four days, 100 maggots were removed from 

 each container and placed on sand. The figures in table 22, show 

 the results. 



