310 THE CANADIAN ENTOMOLOGIST 



trees again received the mixed treatment, and from 22.29 to 22.85% 

 of the olives were infested. In 1911, the 550 trees were used as 

 a check or control and 81.5% were infested. 



Mexican Fruit Fly (Anastrepha ludens Loew). 

 While working on the control of the Mexican or Morelos 

 orange worm, Betanzos (1) discovered the usefulness of a common 

 poisonous Mexican herb (Haplophyton cimicidum). A decoction 

 was made by boiling about two pounds of the herb cut fine in 

 3 gallons of water. After the herb was thoroughly boiled, about 

 2 pounds of sugar was added, and the whole was then strained 

 and used as a spray. Rangel (1) obtained very satisfactory 

 results from the use of this preparation in combatting the Mexican 

 fruit fly. 



Apple Maggot {Rhagoletis pomonella Walsh). 

 O'Kane (16) used a mixture of arsenic, molasses and water 

 to control the apple maggot in New Hampshire. He writes: 

 "Through the co-operation of growers this plan of spraying was 

 tried at several different points. In most the results were negative. 

 It seems probable that in these instances the possible value of the 

 treatment was obscured by the proximity of other infested trees 

 not so treated. Also owing to the pressure of other work the 

 grower was unable to apply the spray as often as would be needed 

 in order to keep the poisoned sweet ready for the flies throughout 

 their egg-laying season. In one instance, however, the treated 

 tree stood alone, and this tree was given repeated sprayings as 

 primarily planned. The variety was August Sweet, and the fruit 

 had been worthless for years. This tree yielded this season prac- 

 tically perfect fruit. 



"There is sufficient reason, therefore, for making further tests 

 of this treatment next season. To this end certain trees or blocks 

 of trees have been selected, and the proper conditions provided to 

 insure definite tests next season." 



In 1911 experiments were conducted at the Maine Agricul- 

 tural Experiment Station to control the apple maggot. Johannsen 

 and Patch (8; write: "Our own experiments made this season upon 

 two Talman sweet apple trees, using a spray of arsenate of lead 

 and brown sugar in solution, gave discouraging results." 



In 1912, Illingworth (6) published his results obtained with 



