324 Report of the Department of Entomology of the 



Table V — Continued. 



Trees. 



Kiiid. 



Peach: 



Degree of 

 iut'bstatioa. Results. 



Per- 



sceiit- _,j, 



No. Age. age iufestation. Results. Checks. 



Yrs. "'!• 



4 Old 20 Nearly dead with May 31. Trees Scales but 

 scale. lucrust- dead, and as a little afCt'Cted 

 ed on trunk and result, scales by winter, 

 nearly all limbs, dead also. Larvae a- 



bundant dur- 

 ing follow- 

 ing season. 



Plum: 



Lombard, 1 8 40 Badly infested. 



Scales dead. No Same, 

 apparent injui-y 

 to tree. 



Sweet 

 Cherky: 



1 12 40 I n c r u *s t e d on May 31. Scales Same, 

 trunk and low- dead. Tree un- 

 er limbs. injured. 



Series II. — The trees were sprayed November 21 and March 17. 

 Weather bright on latter date, temperature 20. Weather during 

 following week bright. Average temperature 29. 



Table VI. — Percentage of Kerosene Required to Kill Hibernating 



San Jose Scale: Series II. 



Trees. 



Per 



-N ceut- 



Kind. 



Plitm: 

 Reine 

 Claude 



Reine 

 Claude 



Sweet 

 Cherry: 



No. Age. age 



Degree of infes- 

 tation. 



Results. 



Checks. 



Trs. 



oil. 



1 8 40 



Badly infested. June 29. 

 Incrustedon dead, 

 lower limbs 

 and trunk. 



Scales Scales not 

 much affect- 

 ed by win- 

 ter. Larvaj 

 abundant. 



»1 8 



20 Badly infested. 

 15 



June 29. Scales 

 not affected. 



Scales not af- 

 f e c t e d by 

 winter. Lar- 

 V ae a b u a- 

 dant. 



■ 100 Moderately 

 fested. 



In- June 29. Scales 

 dead. Tree 

 somewhat in- 

 jured. 



Summary. — These experiments included 58 pear, plum, peach 

 and sweet cherry trees. All of them were sufficiently infested 



,/ 



•Sprayed with 20 per ct. in late NoTemberi with 15 per ct. In early Decembeiv 

 •Bearing. 



