312 THE CANADIAN ENTOMOLOGIST 



rows wide and sixteen long, and had never been sprayed before. 

 For several years the cherries in this orchard had been badly 

 infested, and the previous year the fruit was not picked at all, due 

 to the serious infestation of the pest. The following formula was 

 used : 



Molasses 1 pt. or 3 gall. 



Arsenate of lead 3 oz. or 5 lb. 



Water 4 gall, or 100 gall. 



Two applications of the bait were made on June 10 and 24. 

 Eleven rows were sprayed and five rows were used as a check. 

 The fruit of the unsprayed trees showed an infestation of fully 

 one-third of the crop, while only one-sixth of 1% was wormy on 

 the treated trees. The sprayed fruit showed also a noticeable 

 lack of brown-rot and of curculio injury. 



As in the case of the apple maggot, there is some evidence 

 that arsenate of lead alone, without sweeting, may prove effective 

 against the cherry fruit flies. "Fruit free from the pest resulted 

 in one orchard from merely making two applications of the codling- 

 moth strength (4-100) during the period when the flies were emerg- 

 ing. Although this experiment is not very conclusive, since no 

 checks were left, it indicates clearly the value of spraying cherries." 



Currant or Gooseberry Fruit Fly (Epochra canadensis Loew) • 

 Lovett (10) attempted to control the currant or gooseberry 

 fruit fly with Mally's formula (Table I, 1908) of the poisoned bait 

 spray. No conclusive results were obtained, but the following 

 brief summary of the season's trials is given: 



1. The sweetened poison does attract the fly. 



2. Frequent rains during the period of experimentation made 

 numerous applications necessary. 



3. "Granulated sugar is rather expensive; it crystallizes 

 quickly and is not so satisfactory as a cheaper brown sugar would 

 probably be." 



4. "The crop was injured one half in many localities, and in a 

 few cases the fruit, due to the maggot's attack, was not worth 

 gathering." 



Imported Onion Fly (Pegomya cepelorum Meade). 

 We have experimented with the poisoned bait spray to control 

 the imported onion fly Under Wisconsin conditions. Sodium 



