122 



The Grape-vine Leaf-hopper, which is the most prevalent insect pest 

 of the grape here, was present as usual in large numbers, which, however, 

 were not as great as last year. 



There were large numbers of the Buffalo Tree-hopper this season, and 

 as usual the omnivorous Tarnished Plant-hug was present in force. 



Peas at the College sustained considerable injury from the Pea Aphis, 

 and reports from other parts of the province show that they wrought much 

 damage. 



. (d) Lepidoptera (Moths and butterflies). — 



Cutworms — These caused considerable loss in several districts of the 

 province. The Red-backed Cutworm (Euxoa ochrogaster) was most de- 

 structive. At the college, corn and roots suffered most, but several other 

 crops were attacked. 



The Army Wo:m {Leucania unipiincta) appeared in destructive num- 

 bers in Pontiac county in July, but through the energetic action of Mr. 

 King, the disrict demonstrator, the losses were not great. 



Imported Cabbage Butterfly was not as abundant this year as last, 

 owing doubtless to the large number of its parasites present last year. 

 The Diamond-back Moth (Plutella macidipennis) was, however, present 

 in larger numbers than we have had for some time on turnips, and did 

 damage. 



Tent Caterpillars. — The number present this year, though formidable, 

 was quite small as compared with last year. The ravages of a bacterial 

 disease as well as of dipterous and hymenopterous parasites have made 

 it practically sure that these insects will be reduced to the normal numbers 

 next season. 



The Bud-worm was fairly under control in the College orchards, but 

 in some neighbouring orchards it wrought considerable damage, f^or- 

 tunately there were several parasites present of which the most important 

 was Pentarthron minutum {Trichogramma pretiosa) which destroyed over 

 seventy-five per cent of the eggs. 



The Cigar Case-bearer was quite abundant in unsprayed orchards. 



The Currant span-worm was very abundant, where spraying was 

 omitted, on currants and gooseberries. 



(e) Diptera )Fies). — The Root Maggots of onion and cabbage as 

 well as Phorbia fusciceps which was found attacking turnips last year, 

 were all present, but did not do any serious injury. 



