1913 



ENTOMOLOGICAL SOCIETY. 



79 



Blister Mite (Eriophyes pyri). In a large number of imsprayed orchards 

 this mite is doing much to prevent average crops of apples. I sprayed a very 

 badly infested orchard this spring to test the comparative effect of spraying before 

 the buds had begun to burst and when they were bursting. April 25 and May 6 

 were the respective dates. Both gave excellent results; better than I had even 

 hoped for. 



Brown Mite (Bryobia pratensis) or Bed Spider (Tetranychus himaculatus). 

 In the Niagara District the foliage on many plum trees — whole orchards in fact — 

 had a dull grayish color, indicating clearly that something was Avrong. On examina- 

 tion towards the end of August it was quite evident that some mite, probably 

 the Brown Mite, from the way the eggs were found all over the leaves and along 



Fig. 23. — Blister Mite work on apple and pear leaves. 



the midrib 'on the upper surface, and also from the absence of any silken web 

 on the under surface, had caused this appearance. Unfortunately the mites had 

 almost all disappeared. A few Red Spiders were seen, but I doubt Avhether these 

 were the offenders. It is probable that the reason that lime-sulphur sprayed plum 

 trees in the neighborhood had healthier foliage than Bordeaux sprayed ones was 

 due to the efficiency of lime-sulphur against mites. 



Injury by Bed Spiders to Currant leaves in the Niagara District was very 

 noticeable. 



Pear Psylla (Psylla pyncola). Early in the spring a good many psyllas 

 were seen, but with the coming of the wet, cold weather they soon disappeared, 

 and I saw none again until July 12, when a few nymphs were observed. They 

 did not become numerous enough anywhere, I think, to do any appreciable damage. 



Cherry Fruit Flies (Rhagoletis cingiilata and RJiagohtis fausta). These 

 two flies were about equally common, and did more damage to Miontmorency 



