16 CHEESE. [1899 



dairymaids of the fly trouble. Where it does appear, certainly it creates 

 loss and gives trouble, but if they are careful they can prevent it 

 appearing ; and if it is there they can get rid of it by scraping out the 

 crack and filling it with flour or borax ; but it is important that this 

 should be done with as little delay as possible to prevent further mis- 

 chief being done." — (R. C.) 



Mr. Challinor further obliged me with a few notes from Cheese- 

 makers, from which I give the following extracts without names of 

 contributors : — 



"Mrs. B says that she has rarely had any trouble with the fly. 

 She has an idea that keeping the Cheese in a good sound condition and 

 the room dark is a certain preventative. 



" Mrs. C says that occasionally she has been troubled with the fly, 

 but its visit has always been traced to neglect in leaving some crack or 

 opening in the Cheese exposed. 



" Mr. D says that in most cases the Cheese leave the farmer's room 

 before the flies can give much trouble. In his opinion, to find the 

 effects of the work of the fly in its worst form we should follow the 

 Cheese to the warehouse or the place where they are stored before they 

 are distributed for consumption. The dealers or factors I know to 

 have suffered severely on account of the fly developing in the Cheese, 

 very often through a little neglect on their part in not giving attention 

 to the places where they have been bored for tasting ; but I believe that 

 most of them now make one of their men responsible to see that they 

 have the attention needed. 



" Hot steam. — I should think that hot steam would destroy either 

 maggot or fly, but few farmers could manage this. No boiler or other 

 convenience at their disposal." 



The above notes from "B," " C," and "D" contributed by Mr. 

 Robert Challinor. 



The remarks relatively to "hot steam" are in reply to some 

 inquiries of my own as to how far this application might be considered 

 serviceable where steam power icas available. It is now a good many 

 years since I was consulted as to some practicable method of getting 

 rid of this Cheese Fly infestation on a large scale, and, as steam power 

 in this instance was at hand, I suggested turning on hot steam by the 

 hose into the Cheese-room or store, with the view of killing maggots, 

 chrysalids, and flies — in fact, destroying the infestation in any stage in 

 Avhich it might be present by scaldituj it out. As matter of course, the 

 store-room was cleared of Cheese before the current of hot steam was 

 applied. This was several years ago, and, not being working on stored 

 material of this kind at the time, I did not keep the notes, so I am 

 unable to give report of results verbatim, but I understood that the 

 treatment was successful. 



