452 



STATE BOARD OF AaRICULTURE. 



A portion of another block in this orchard was not sprayed until about one 

 week after the petals had fallen. At that time a mixture suggested by Ross* 

 was used. It was made up as follows : 



Lime-sulphur solution, 23/^ gallons 



Hydrated lime, 10 pounds 



Lead arsenate (powder), 13^ pounds 



Black Leaf 40, 1 pint 



Water to make up to 100 gallons 



An unusually thorough application' was made, using a rod with an angle 

 nozzle. The trees are not so high but that they could be thoroughly sprayed 

 by one man working from the ground with a spray rod. 



These trees were carefully examined in June and again in September and 

 October. Only a few psylla were found at any time and the foliage was in 

 good condition at all times. 



Other orchards. Observations were made in several other orchards but a 

 statement of applications and results would be mainly a repetition of state- 

 ments already made. While a detailed statement of these observations will 

 not be included, the results have been considered in drawing general con- 

 clusions of the work. 



*Wm. A. Ross, Entomological Laboratory, Vineland Station, Ontario. 



Fig. 9.- — A view in Orchard No. 4 in which pear psylla was quite completely controlled by one appli- 

 cation about one week after the petals had fallen. Picture taken Oct. 7, 1921. 



