74 PEOTECTION OF PLANTS — 1924-25 



July 23. In unsprayed orchards this pest punctured as high as 50% of the fruit, 

 but in sprayed trees the injury was very much less. With but one exception 

 this insect was the worst pest of apple this year. 



Codling Moth. (Carpocapsa pomomella L.) 



This insect has greatly increased during the past few years and this year 

 some unsprayed trees showed as high as 40% infestation. The injury has prac- 

 tically all been of the "sideworm" type. 



Bud moth. (Tmetocera ocellana Schiff.) 



This early spring insect was not troublesome to any extent. In some or- 

 chards it was more prevalent than in others, but where orchards were carefully 

 sprayed at the correct times this insect was almost entr; ly absent. 



Aphids. 



The orchards in Quebec are surprisingly free from these small but trouble 

 some pests, and nicotine sprays are not necessary. Aphids,however, give some 

 trouble on nursery stock, and the trees have to be carefully watched for this 

 pest. 



Apple maggot. (Rhagoletis pomonella Walsh). 



Probably the most serious pest of apples in the Hemmingford and Covey 

 Hill districts is the apple maggot. July 15, usually, the flies make their appear- 

 ance, but this year the first fly was observed on July 9, which constitutes a Que- 

 bec record in all probability. In orchards treated for this insect there is a great 

 reduction in the infestation, but iij untreated orchards 100% loss h'as been 

 observed and reported. Ent. Circ. No. 28, of the Entomological Branch, Dept, 

 of Agric, Ottawa, deals with this insect and its control in Quebec. 



Fall web worm. (Hyphantria cunea Dru.) 



Towards the end of June eggs of the fall webworm were laid, and shortly 

 after this the webs of the caterpillars could be seen especially in apple trees. 

 There was a considerable number of webs this year particularly on the unsprayed 

 trees. The webs covered a considerable area by August 20, and the webworms 

 mostly in the third instar, were feeding vigorously. Any orchard sprayed for 

 apple maggot is not likely to be troubled with this pest, because the spray is 

 applied just about the time the young webworms are hatching and before they 

 commence to make the web. 



Elm leaf miner. (Kaliofenusa ulmi Sunde.) 



In certain district near Hemmingford this recently imported pest was ob - 

 served. It was noticed doing considerable damage to elms at Covey Hill and 



