Peas — Contimied. 
immunity of, from wireworm in- 
jury, 144. 
Pecan, 60. 
infested by San Jose Scale, 59. 
Walnut Caterpillar on, 8. 
Pegomyia brassicae, 108. 
ceparum, 133. 
cepetorum, 133. 
Pepper, immunity of, from wireworm 
injury, 144. 
I'eppers injured by Stalk-borer, 147. 
by Greenhouse White-fly, 121. 
Pepperbush, 60. 
Peridroma margaritosa, 107, 129-132. 
saucla, 107, 129. 
permundanum, Exartema, 94. 
perniciosus, Aspidiotus, 58. 
persicae, Myzus, 146. (See Errata.) 
Persimmon infested by San Jose 
Scale, 59. 
Oak Twig-pruner bred from, 50. 
Philadelphus, Cottony Maple Scale 
found on, 62. 
Phorbia brassicae, 108-111. 
ceparum, 133-137. 
fusciceps, 111. 
Phorocera rufilabris as parasite of 
Colorado Potato-beetle, 142. 
Phyllotreta sinuata, 114. 
vittata, 113-114. 
pictipes, Sesia, 34. 
Pieris rapae, 104, 133. 
Pigweed as breeding plant of On- 
ion Thrips, 124. 
Pine, 60. 
Heart-wood Borer common under 
bark of, 69. 
pisi, Aphis, 138. 
Macrosiphum, 138. 
Siphonophora, 138. 
Plant-beetles, 91. 
Plant-lice, 100. 
insecticide for, 154, 158, 159. 
thrips, white-fly, etc., insecticides 
for, 148-149. 
Plant-louse, Cabbage, 111-113. 
Lettuce, 132-133. 
Omnivorous, 146. 
Potato, 145-146. 
Plowing, fall, as means of insect 
control, 101, 148. 
Plum, black-knot of. Viburnum Bor- 
er bred from, 34. 
-curculio, 90. 
infested by Cottony Maple Scale, 
62. 
• by Viburnum Borer, 34. 
injured by green fruit-worms, 75. 
by Oak Twig-pruner, 50. 
Poa flava as food plant of Straw- 
berry Crown-girdler, 92. 
serotina, 92. 
Podosesia syringae, 27-31. See Lilac 
Borer. 
I'ontia rapae, 104-107, 133. 
Poplar and Willow Borer, 40-44. 
burrows of, 42. 
description of adult of, 42- 
43. 
of larva of, 42. 
indications of Injury by, 42. 
introduction and spread of, 
40, 41. 
life history of, 42, 43. 
mea-iures against, 44. 
as food plant of Bronze Birch-bor- 
er, 55. 
borer bred from, 34. 
borers, 31-34. 
Carolina, 7, 40. 
infested by poplar borers, 31. 
injury to, by Yellow Poplar-Cater- 
pillar, 7. 
-Caterpillar, Yellow, 6-8. 
injured by Cottony ]Maple Scale, 
62. 
by Oyster-shell Scale, 58. 
by Poplar and Willow Borer, 40. 
Ijy poplar borers, 31, 34. 
by San Jose Scale, 59. 
by White-marked Tussock-moth, 
10. 
populi, Apatela, 6. 
Populus candicans, 31. 
Porthetria dispar and Euproctis chry- 
s^orrhoea, 14-21. See Brown-tail 
Moth and Gypsy Moth. 
Potato, 99, 100, 140-146. 
-beetle, Colorado, 141-143. 
-beetles, 100, 101. 
cabbage-worms, and cutworms, 
insecticides for, 148. 
destroyed by Stalk-borer, 147. 
Flea-beetle, 145. 
Plant-louse, 145-146. 
principal insect enemies of, 141. 
rank of, as a crop in Illinois, 140. 
Potatoes injured by Limonius con- 
fusus, 143. 
Potentilla glandulosa as food plant 
of Strawberry Crown-girdler, 92. 
Poultry as enemies of Colorado Po- 
tato-beetle, 142. 
of Onion-maggot, 135. 
Preston, W. P., 128. 
I-rickly Ash, 60. 
Printers' ink as protection against 
Canker-worm, 26, and Forest Tent 
Caterpillar, 23. 
Prunus infested by Putnam's Scale, 
61. 
