INDEX 



Ailanthus apparently exempt from at- 

 tack by San Jose Scale, 97. 



Almond, Flowering, subject to serious 

 injury by San Jose Scale, 97. 



Althea rarely injured seriouslyby San 

 Jose Scale, 97. 



Anise oil to repel Corn-field Ant, 3. 



Ant, Corn-field. See Corn-field Ant. 



Aphelinus fuscipennis as parasite of 

 San Jose Scale, 100. 



Apple subject to serious injury by 

 San Jose Scale, 97. 



Apples, development and multiplica- 

 tion of San Jose Scale on, 63-64, 79. 



Asafetida, tincture of, applied to seed- 

 corn, 45, 61. 

 to repel Corn-field Ant, 3. 



Ash rarely seriously injured by San 

 Jose Scale, 97. 



Aspidiotus perniciosus. See San Jose 

 Scale. 



aurantii, Prospaltella, 100. 



B 



Barberry apparently exempt from at- 

 tack by San Jose Scale, 97. 



Beech, European purple-leaved, sub- 

 ject to serious injury by San Jose 

 Scale, 97. 



Birch, seldom seriously injured by 

 San Jose Scale, 97. 



Birds as carriers of San Jose Scale, 

 98, 106. 



Bittersweet apparently exempt from 

 attack by San Jose Scale, 97. 



Blackberry, rarely seriously injured 

 by San Jose Scale, 97. 



Buckthorn subject to serious injury 

 by San Jose Scale, 97. 



Butternut apparently exempt from at- 

 tack by San Jose Scale, 97. 



Button-bush apparently exempt from 

 San Jose Scale attack, 97. 



Buttonwood exempt as above, 97. 



California Privet seldom seriously in- 

 jured by San Jose Scale, 97. 



Carbolic acid, results of treating seed- 

 corn with, 5, 17, 19, 43. 

 Catalpa seldom seriously injured by 



San Jose Scale, 97. 

 Cherry, Sour, rarely seriously dam- 

 aged by San Jose Scale, 97. 

 Sweet, subject to serious injury 

 by San Jose Scale, 97. 

 Chestnut rarely seriously damaged by 



San Jose Scale, 97. 

 Citronella oil, results of treating seed- 

 corn with, 17, 19. 

 Coffee-tree, Kentucky, apparently ex- 

 empt from San Jose Scale attack, 

 97. 

 Corn-field Ant and Corn Root-aphis, 

 1, 2, 3, 17, 18, 19, 20, 52. 

 laboratory experiments with re- 

 pellents for, 21-41. See under 

 Repellents, 

 nocturnal movements and migra- 

 tions of, 53, 55, 62. 

 repellents for, in field, 3. 

 substances variously, or not at all, 

 repellent to, 23, '41. 

 Corn, injury to seed-, by various re- 

 pellents, 4, 5. 

 maximum period for continuing 

 land in, where Corn Root-worm is 

 destructive, 84. 

 Root-aphis and the control of its 

 injuries, recent Illinois work on, 

 1-62. 

 key to control of, 1-4. 

 munber of generations of, 2. 

 result of experiments with repel- 

 lents against, 5-6. See also un- 

 der Repellents. 

 Root-louse. See Corn Root-aphis. 

 Root-worm, Northern, life history 

 and habits of the, 80-86. See un- 

 der Northern Corn Root-worm. 

 Crab-apple, Wild, susceptible to San 



Jose Scale infestation, 98. 

 Currant subject to serious injury by 

 San Jose Scale, 97. 



Deutzia rarely seriously injured by 



San Jose Scale, 97. 

 Dewberry rarely injured as above, 97. 



