Pear as food plant of Colaspis 

 brunnea, 148. 

 -blight, 99, 102. 



appearance of stock infected 

 with, loi, 125 ; destruction 

 of, 125. 

 bacterium causing, 124. 

 spots due to, 127. 

 nature and effect of, loi, 124. 

 trees and plants subject to, 

 loi, 125. 

 California wash for, 53, 55. 

 crown-gall of, in. 

 effect of kerosene emulsion on, 

 48, 51, 52. 

 infested by Walnut Scale, 115. 

 -leaf blister, 99. 



appearance of, 102, 132. 



grh stage of, 133. 



mite causing, description of, 



133- 

 destruction of, 134. 

 winter (juarters of, 102. 



133- 

 Mite, 99, 102, 132. See above. 

 ' sprayed with crude petroleum, 

 92; effect, 93. 

 with kerosene emulsion 42, 46, 



47- 

 with pure kerosene, 92; effect, 



93- 

 treatment (>f, witli hydrocyanic 



acid gas, 28, 37, 40. 

 pertinax, Sphenophorus 13, 14,15,17. 

 Phleum pratense, 148. See Tim- 

 othy. 



Phragmites communis injured by 

 Sphenophorus ochreus, 10. 

 Picking off tufts of leaves for Leaf- 

 crumpler, 131 . 

 placidus, Sphenophorus, 8. 

 Plant-lice, loi, 104, 127-129. 

 eggs of, 103, 104, 128, 129. 

 winter stage of, 104. 

 (See also underApple-leaf Aphis 

 and Cherry Aphis.) 

 Plowrightia morbosa, 125. 

 Plum, California wash for, 50, 53, 

 54. 55-68. 

 infested by Black Peach-Aphis, 

 100, no. 



Plum iniested—Conf/ntifd. 

 by Tussock-moth, 102. 

 by Walnut Scale, 115. 

 -scab, 127. See under Peach 



fruit spot, 

 sprayed with kerosene emulsion, 

 40; effect, 48, 51. 

 subject to attack by Peach-tree 

 Borer, 100, 122. 

 to crown-gall, 100. 

 to peach fruit-spot, loi. 

 treatment of, with hydrocyanic 

 acid gas, 2g, 30, 37. 

 Poa compressa as food plant of 

 Colaspis Root-worm, 148. 

 pomorum, Mytilaspis, ng. 

 Potato infested by Colaspis brun- 

 nea, 145, 148. 

 pratense, Phleum, 148. 

 Printers'-ink bauds ft)r Canker- 

 worm, 142; cost of application of, 



143- 

 Prune subject to attack by Peach- 

 tree Borer, 122. 

 prunicola. Aphis, 107. 

 Putnam Scale, 114. 



economic importance of, 115. 



treatment for, n6. 



trees infested by, 115. 



winter stage of, 113. 

 pyri, Eriophyes, 132. 



Q 



Quince, effect of kerosene emul- 

 sion on, 52. 

 injury to, by Leaf-crumpler, 130. 

 subject to crown-gall, 100. 



R 



Raspberry, anthracnose of, loi, 

 126. See under Anthracnose. 

 crown-gall of, i n. 

 infested by Rose or Raspberry 



Scale, 120. 

 Scale, 113, 120. See under Rose 

 Scale. 

 Red-haw injured by Canker-worm, 

 144. 

 Reeds, 10. 



Remedies and preventives for in- 

 sect and fungus pests : 

 arsenical sprays, 135, 136, 139. 



