THE HAMILTON ASSOCIATION. 87 
SOME PROBLEMS IN HORTICULTURE. 
2.—INSECTS INJURIOUS TO PLANTS. 
ead before the Hamzlton Assoctatzon, March oth, 1893, 
BY L. WOOLVERTON, M. A. 
The title of this paper, as I first wrote it down, was misleading. 
It was ‘‘ Insects Injurious to the Fruit Grower.” A lady seeing it 
remarked, ‘‘ Your subject seems to be rather a limited one; with 
how many insects is the fruit grower affected ?” 
In a way, surely the fruit grower is affected by all those insects 
which injure his fruit—his pockets certainly suffer to an immeasur- 
able extent. It has been computed that hundreds of thousands of 
dollars are annually lost to our fruit growers, through the injuries 
caused by our insect enemies. 
I am well aware that in treating upon insects I am treading 
upon well-worn ground, and I can scarcely be expected to bring 
before you any new discoveries. The pathways are well worn by 
such masters of entomology as Riley, Packard, Saunders, Harris, 
Ormerod, Pettit, and numerous others. Mr. Packard’s work is too 
general for the use of the fruit grower; Harris’ is most interesting, 
but not arranged well enough, nor is it sufficiently complete to meet 
the needs of the practical fruit grower ; Riley’s work for the United 
States, and Miss Ormerod’s for England are invaluable, but it remain- 
ed for our own Professor Saunders to write a book, under the title of 
the above heading, exactly suited to the needs of Canadian fruit 
growers, arranging it for practical purposes under such heads as 
‘insects injurious to the apple,” ‘‘ to the pear,” “to the peach,” “to 
the grape,” etc., classifying the different insects under each head 
according to the part which they affect, whether the root, bark, leaves 
or fruit. This has proved a most convenient arrangement. I would 
suggest to some of our amateur collectors that they might make for 
themselves a most interesting collection on this same basis. This 
would not be so scientific an arrangement from an entomological 
