50 THE EEPORT OF THE No. 36 



Apple Curculio (Anthonomiis quadrigihhiis) . In several localities I found 

 apples punctured by this pest but the total number affected was small. It is 

 evidently a rare insect in apple orchards in Ontario. 



Leaf-Rollers (Arohips spp). From Durham County complaints of damage 

 to apples from so-called " Green Fruit Worms" have been received. On question- 

 ing more closely I found that it was not this insect but Leaf-rollers that were 

 responsible. Arsenical sprays are not so satisfactory against these as one could 

 wish, but the total damage done does not, I think, warrant any special treatment. 

 The most common species seems to be Archips rosaceana and not A. argyrosphila. 



Lesser Apple- Worm {Enarmonia prunivora). I have been considerably 

 surprised to see that a large percentage of the so-called Codling Moth injuries to 

 fruit in Wellington County this year has in reality been caused by the Lesser 

 Apple-Worm. This pest is, as mentioned in previous years, very common in haws. 



Tent-Caterpillars (Malacosoma spp.). Both the American and Forest 

 Tent-Caterpillars have spread widely since last year. The former species is now 

 becoming abundant in some counties west of Toronto. East of Toronto and 

 especially from about Trenton on doM^i the St. Lawrence River both species are 

 very numerous and have done much injury to fruit trees. Several kinds of forest 

 trees, especially maples and poplars, have also been severely attacked. From 

 Morrisburg in August I brought to Guelph a number of clusters of egg masses to 

 test how severely these were parasitized. Only about 20 parasites emerged and an 

 examination of the clusters seemed to indicate that the prospects for another 

 serious outbreak next year were only too good. No well sprayed orchard either 

 last year or this year has suffered from these pests. In this connection it is very 

 interesting to learn that the regular spring strength of lime-sulphur applied soon 

 after the caterpillars emerge from the eggs, which is about the time of the opening 

 of the buds, destroys almost all those hit, no arsenical being necessary. This was 

 well tested by Mr. Bradt near Morrisburg on fourteen apple trees, two other trees 

 being left as a check. 



Fall Cankerworm (Alsoplbila pomelaria). For the last two or three years 

 this species of Cankerworm has been very abundant and destructive in the County 

 of Wentworth. Wherever the orchards are cultivated and well sprayed it is kept 

 under good control, but many neglected orchards are defoliated. Judging from 

 the number of females to be seen throughout November there will be numerous 

 caterpillars again next year. In the County of Haldimand there is another colony 

 of this insect but I have no report as to the amount of damage being done. 



Aphids. These insects have not been general throughout the province this 

 year but in some localities apple trees have been severely attacked. On the whole 

 I should call it an average year for aphids on all kinds of fruit trees and shrubs. 

 Fruitgrowers are more familiar with the injury they do and are more easily 

 alarmed than would have been the case a few years ago. 



Apple Maggot {Rhagoleiis pomoneUa) . There has been a remarkable dim- 

 inution in the number of this apple pest, probably due to the excessive moisture 

 and low temperature of the summer and autumn of 1912. I have now discovered 

 its presence in sixteen counties thus showing that it ranges from the extreme east 

 near Ottawa to the west near Sarnia. It is evidently not nearly so serious a pest 

 a? it formerly was thought to be. 



