82 



THE EEPOET OF THE 



No. 36 



Blackbekky LEAiP-MiNER {Metollus ruhi). This leaf-miner is still abundant 

 in parts of the Niagara District. Fortunately it does almost no damage until about 

 the middle of July. By this time the forming fruit is getting well advanced. 

 Control seems difficult. Kerosene emulsion has been recommended, but in my 

 tests it proved useless, as it could not penetrate even the dead epidermis. The 

 insect passes the winter in the ground in the larval stage in a small, round, earthen 

 case abut 5 m.m. in diameter. Possibly removing the earth to a depth of about 

 two inches from underneath the bushes in spring, followed by frequent cultivation, 

 might destroy the larvae or pupae. The cases, however, do not break very easily. 



Easpberry Cane-borer {Oberea himaculata). Dr. Bethune received several 

 letters containing specimens of this insect's work but not so many as in previous 

 years. .1 saw almost no sign of its presence in the Niagara District. 



Strawberry Weevil (Anihonomus signatus). Specimens of this tiny 

 weevil were sent in from Brant County, where it was doing sufficient injury to 

 attract the attention of some growers. It occurred in small numbers in one or 

 two other localities. 



Insects Attacking Vegetables. 



Cutworms. Very few outbreaks of Cutworms have been reported. At Bur- 

 lington there was considerable damage done to cabbage and other closely allied 

 plants by what I believe was the Eed-backed Cutworm, but this is the only case 

 I can recall of anything like an outbreak this year. 



, • ^ 



Fig. 28.— Onion Maggot and' Work. 



h ^ 



Fig. 29. — Cucumber Beetle, larva and pupa. 



Onion and Cabb^vge Maggot {Pcgoivijia hrassicae and P. cepetorum.) These 

 insects were not so abundant as last year. 



Cucumber Beetle (Diabrotica vittata). Comparatively few of these beetles 

 were to be seen in most places visited. 



Asparagus Beetles {Crioceris asparagl and C. 12-punctata) . These two 

 beetles were moderately abundant at Guelph, but very few complaints came in 

 about them. (Fig. 30.) 



Colorado Potato Beetle (Leptinotarsa decemlineata) . It is a pleasure to 

 be able to report that Perillus bioculatus var. claudus seems to have passed the 

 winter safely in most districts and to have done much to control the Potato 

 Beetle. This friend is quite common at Guelph and in many other parts of 

 Western Ontario. I have had it reported from as far east as about eight miles 

 from Ottawa. I sent a few live specimens to the latter district where this year 

 the insects were found. The specimens had been freed in the potato field. 



