3'26 RErouT of the Dei'artment of Entomology of the 



The following experiments with pear and apple trees included 

 but one application of oil. The apples were sprayed May 4 and 

 5, The w^eather was bright, slight wind, temperatures May 4, 

 54°, May 5, 56°. Average temperature during the following 

 week 60°. The pears were sprayed May 12. The weather was 

 bright with a strong wind. Temperature 64°. Average tem- 

 perature during the following week 55°. 



Table VIII. — Bearing Apple and Pear Trees Sprayed With 100° 



Tiees.' 



Dwarf Pear: 

 Principally Bart- 

 lett. 



40 



Fire-Test Kerosene. 



Kesulta. 



15 



May 9 small percentage of leaves killed. 



Mny 9 a little less than one-third of leaves 

 killed. 



May 9 from one-third to one-half of leaves 

 killed. Bark somewhat discolored near 

 base of larger limbs. 



May 9 about two-thirds of leaves killed. 

 Bark discolored on many of the limbs. 



Nearly all of the leaves killed. Also some 

 of the small branches. The bark on the 

 large limbs and trunk injured in spots 

 but not enough to seriously affect the 

 tree. All of the trees put out new 

 foliage. 



No injury to leaves. or bark except in a few 

 cases where the nozzle was held in one 

 place too long. This injury was very 



slight. 



Series Ih. — In these experiments 150° fire-test oil was used on 

 healthy, bearing apple and pear trees. One application was 

 made on one lot of apples on June 4 and 5, and on another lot 

 June 10. Weather cloudy, wind mild, temperature 66°. Aver- 

 age temperature during week following 73°. 



'Full size tiees. 



