40 



THE REPORT OF THE 



No. 19 



The Tussock moth {Orgyia leucostigma) Figs. 24 and 25, is still by far the moit formidable 

 enemy of our shade trees, although it appears 

 to be gradually diminishing in numbers and was 

 distinctly less abundant than it has been during 

 the past three or four years. Very few trees were 

 •bserved that were completely stripped or nearly 

 so, though in the lower part of the city there I /' 

 were a good many badly disfigured trees. Very^l^-^* 

 little has yet been done to control its ravages. Fig. 25. Tussock Moth Caterpillar, fuil-trrown. 



On the above property there was a large plantation of red currant bushes, which, at the 

 time they were seen by the writer (August 15) were almost completely stripped by the larvte 

 / 





Fig. 26. Currant Saw-fly : a male ; b female. 



Pig. 27. Currant Saw-fly caterpilars. 



of the imported currant Saw-tly {Nematus ventricosus) Figs. 26, 27 and 28. They occurred in 

 ultitudes and in vai'ious stages of development, and although the currant bushes were nearly 



bare of foliage, aa adjacent patch of gooseberries was almost entirely free from the pest. 



Notwithstanding the condition of the foliage the fruit was abundant and of large size. 



About the middle of May a large number of Pin cherry trees (Frunvi Peimsylvanica) in 



High Park were found to be badly attacked by the Cherry Aphis ( Vlyzus cerasi) the leaves at 



the ends of the branches being very much crumpled 

 and disfigured. Subsequently they were found plen- 

 tifully on the wild black cherry and also on the 

 cultivated cherry. 



The Cabbage Butterfly {Pieris rapae) has been 

 exceedingly abundant this summer and has caused a 

 great deal of damage to cabbages and allied vegetables 

 in this locality. On August 15, while inspecting a 

 large market garden north of the city, the writer 

 observed great numbers of the larvpe in all stages on a 

 large bed of cabbages. They were to be found prac- 

 tically on every head, and many plants were quite 

 unmarketable. An adjacent bed of cauliflowers was 

 but little affected, though a few caterpillars were 

 holes eaten by the youn^' larva;. found on some of the heads. In another bed of 



cabbages only a few hundred yards distant from the one just referred to, the caterpillars 



were much fewer in numbers though plentiful enough. 



Currant Saw-fly : leaf showing eggs anrl 



