1922 



ENTOMOLOGICAL SOCIETY, 



43 



Canker Wokm Work (PaleacrUa vernata and Alsopliila pometaria). The 

 spring canker worm was abundant in several parts of the provinces — notably in 

 Huron and Pell counties. The fall canker worm was also present in large numbers, 

 especially near the southern end of Halton county. It will not be surprising if there 

 are several outbreaks of these insects this coming season. 



Green Apple Bug (Lygus communis). In last year's report we stated that 

 this insect had been discovered in a few orchards near Newcastle, and that it had 

 done much harm to pears and apples, especially to the former. This year we con- 



Peach tree severly attacked by fruit- 

 tree bark-beetles. 



ducted experiments on the control of the bug in the two worst infested pear and 

 apple orchards. Most of the trees were sprayed with nicotine sulphate, 1 pint to 

 100 gallons of the regular spray mixture, and the others were dusted with a 

 sulphur contact dust, containing 2% nicotine. High pressure, 225 lbs. was used 

 for liquid applications, and the trees were thoroughly drenched. Most 

 of the spraying and all the dusting was done just after the blossoms fell, but 

 some of the spraying could not be completed until four days later. The results! 

 on all the early sprayed trees were excellent, scarcely a pear and very few apples 

 showing any green bug injury. On the later sprayed pear trees, at least 50% 

 of the fruit was injured by -the bug. The dust proved to be very unsatisfactory; 

 for instance, practically all the fruit on two rows of pears which were well dusted, 

 was so deformed that it was unsaleable. 



Fruit Tree Leaf Roller (Torfrix (Cacoecia) qrgyrofipila) . This destruc- 

 tive pest, unfortunately difficult to control, seems to be increasing and spreading 

 more widely than in the past. Many fruit growers in the apple growing sections 

 from Whitby to Trenton now consider it the worst insect pest in their orchards. 



