Oregon and California washes, use 



of, in Illinois, 68-go. See also 



under California and Oregon. 



wash for San Jose Scale, 67, 82-87. 



details of experiments 



with, 82-87. 

 preparation of, 72. 

 tables showing effect 

 of, 83, 84. 

 used on Apple, 82, 85. 

 on Peach. 82, 85. 

 Osage Orange hedge infested by 

 San Jose Scale, 35, 38, 39, 

 40. 41. 43. 

 destruction of, 30, 40, 41. 

 treatment of, with kerosene 

 emulsion, 40. 

 Oyster-shell Scale, distribution in 

 Illinois. 119. 

 eggs of, 1 19. 



general description of, 119. 

 protection against, 120. 

 winter stage of, 113. 



parasitica, Clitocybe, in. 

 Paris green and lime, spraying 

 with for Leaf-crumpler, 131. 

 spray for Bag-worm, 136. 

 Parrott, P. J., on Sphenophorus 

 pertinax, 18. 



parvulus, Sphenophorus, 3, 22. 

 Peach-Aphis, Black, description of 

 two forms of, 108, 1 10. 

 destructiveness in the East, 



108. 

 effect on tree, 108. 

 infesting roots of Peach and 



Plum, 100. 

 protection against, no. 

 winter form of, 104. 

 California wash for, 50, 52, 53, 54, 



55- 

 crown-gall of. no. 

 Diaspis, economic importance of. 



117- 

 eggs of, n7. 



general description of. iij. 

 winter stage of, n3, n7. 

 effect of whale-oil soap on, 44, 

 45- 



Peach - Continued. 



fruit-spot, description of, loi. 

 destruction of stock infected 

 by, 127. 



fungus causing, 101. 

 trees subject to, 127. 

 infested by Putnam Scale, n^. 

 injury to by Black Peach-Aphis, 

 108. 

 by kerosene emulsion, 48, 51. 

 by Leaf-crumpler, 130. 

 by Peach-tree Borer, 100, 

 104, 122, 123. 

 Lecanium, appearance on bark, 



113- 

 economic importance of, n8. 

 general description of, n8. 

 winter stage of. n3. 

 Oregon wash for, 82,. 85. 

 sprayed with crude petroleum, 

 92 ; effect, 93-95. 

 with kerosene emulsion, 46. 47 

 52. 

 with whale-oil soap, 96 

 effect, 97. 

 with Los Angeles Count/ 

 wash No. 5, 96 ; effect, 97. 

 with pure kerosene, 92 ; effect, 



93- 

 treatment of, with hydrocyanic 

 acid gas, 30, 32, 36, yj, 38, 39. 



41. 42. 

 -tree Borer, 09. 



appearance of, and charac- 

 ter of injury by, 100, 104, 

 123, 124. 

 description of, 100. 

 destruction of stock infested 

 with, 124. 



distribution of, 122. 

 eggs of, 122, 124. 

 fruit-trees subject to attack 

 by, 100. 



in Illinois nurseries, 122. 

 methods of its spread, 122. 

 size and situation of, during 

 hibernation, 124. 

 winter stage of, 104, 123. 

 -trees, destruction of infested, 40 

 41. 42. 49. 50- 

 -vellows, loS. 



