Remedies and preventives — Continued. 

 scalecide, 41. 

 tansy oil, 3. 



and bone meal, 45. 

 turpentine, 17, 18-19. 

 Repellents combined with fertilizers 

 as measure against Corn Root- 

 aphis and attendant ant, 44-48. 

 60. 

 contributing cause of injury to seed- 

 corn by, 16. 

 effect of a wet planting-time on ac- 

 tion of, 7-21, 61. 

 effects of, on Corn-field Ant^ — 



laboratory experiments, 21-41, 61. 

 fertilizers found useless as, 41. 

 field experiments with, 17-21, 41-44. 

 used in laboratory experiments with 

 Corn-field Ant : 

 anise oil, 23, 34. 

 apterite, 23, 38. 

 asafetida, tinctui-e of, 23, 33. 

 calcium carbide, 41. 

 capsicum, 41. 

 carbon bisulfid, 40. 

 chlorid of lime, 41. 

 coal-tar, 23, 38. 

 formic acid, 36. 

 gum camphor, 23, 34. 



in solution, 35. 

 iron sulfate, 41. 

 kerosene, 23, 24. 

 oil of lemon, 23, 25, 26, 27, 29. 

 and bone meal, 30. 

 and wood ashes, 31. 

 emulsicn, 28. 

 pyrethrum powder, 41. 

 tansy oil, 23, 32, 33. 



tea, 33. 

 tobacco, 41. 

 vaporite, 39. 

 vermicide, 39. 

 Root-lice, clover, infesting roots of 

 Corn, 4. 

 grass, infesting roots of Corn, 4. 

 Rose subject to serious injury by 



San Jose Scale, 97. 

 Rotation of crops and cultivation 

 methods as protective meas- 

 ure against Corn Root-aphis. 

 48-49. 

 to protect from Corn Root- 

 aphis, 4. 

 with fall plowing to afford 

 aliove protection, 58-60. 



San Jose Scale, 87-106. 



California and Oregon washes 

 for, 102. 



San Jose Scale — Continued. 



classification of products of, as to 

 stages of development, 95. 



climatic conditions as affecting, 

 99. 



dangerous character of, 90. 



data as to percentage of females 

 and males of, 94, 97. 



data of discovery in Illinois, 

 early local distribution, and 

 progress of infestation, 88-89. 



destruction of nursery stock in- 

 fested by, 100. 



difference in effect between fall 

 and spring spraying for, 73. 

 79. 



effectiveness of one or two spray- 

 ings a year for, 79. 



food plants of, 97-98. 



fumigation of nursery stock as 

 protective measure against, 

 101. 



general summary as to mortality 

 of, during breeding experi- 

 ment, 96. 

 as to stages of, 95. 



grading of trees as to infestation 

 by, 69, 71. 



hibernating stage of, 91. 



home-made and ready-made solu- 

 tions for, 79. 



importance of early spraying for, 

 73. 



in forests, 98. 



insecticides tested, and equipment 

 used in applying, 70-71. 



inspection of nurseries for, 100. 



life history and appearance of, 

 90-97. 

 in Illinois, with data of 

 breeding-cage experiments, 

 64-68. 



lime-sulphur wash for, 101, 102- 

 103. See also under Lime-sul- 

 phur. 



means of control of: 

 artificial checks, 101. 

 natural checks, 99. 

 preventive measures, 100. 



means of distribution of, 98. 



miscellaneous directions for con- 

 trol of, 105. 



niiscible oils for, 79, 104. 



most effective way to destroy, 

 101-102, 105. 



number of descendants during re- 

 producing season of, 94. 



number of generations of, and 

 times of appearance and ma- 

 turing, 94, 



