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Plant-lice, 45. 
Oe ee ee Sy wees PP ee Pe ey ee 
a tee Pe 
Plantago major infested by Corn Root 
Aphis, 53. 
Plantain as food of Pale-striped Flea- 
beetle, 19. f 
infested by Corn Root Aphis, 53. 
and Mealy Bugs, 48-95. 
points distinguishing, 48. 
Ants associated with, 50. 
differences in life history, 49. 
fungus disease of, 65. 
number of species infesting corn 
roots in Illinois, 50. 
key aa species infesting corn roots, 
rate of multiplication, 48, 56. 
(See under Corn Leaf Aphis and 
Corn Root Aphis.) 
late fall, as measure against 
Corn Root Aphis, 70. 
against Wireworms, 381, 42. 
to destroy Ants in attend- 
ance on Corn. Root 
Aphis, 69. 
Plum as food of Hop Plant Louse, 49. 
leaves as food of adult Southern 
Corn Root Worm, 131. 
of May Beetles, 101. 
poz, Rhizobius, 94. 
Poisons, prsenicads 
4 
Plowing, 
effect on Seed-corn, 
for Agonoderus pallipes, 11. 
for Wireworms, 42, 
(See also under Insecticides.) 
Pollen, 131, 137, 138, 139, 141. 
Eeers as food of Corn Root Aphis, 
infested by Grass Root Louse, 77. 
Polymeechus brevipes dusted with spores 
of Botrytis tenelia, 117. 
polyturator, Pelecinus, 109, 118. 
Poplar, Lombardy, leaves of, as food of 
May Beetles, 101. 
Portulaca destroyed by White Grubs, 99. 
pears as food of Corn Root Aphis, 
Potash salts for Northern Corn Root 
Worm, 143. 
Potassium cyanide for Wireworms, 43. 
Potatoes as food of Pale-striped Flea- 
beetle, 19. 
infested by Wheat Wireworm, 32. 
by White Grubs, 96, 100. 
: by Wireworms, 26. 
preetermissa, Lachnosterna, 122, 124. 
Predaceous Insects, 110, 111, 1338, 142. 
Prionus Grubs, 128. 
economic significance, 128. 
imbricornis, 47, 128. 
laticollis, 47, 128. 
proliferum, Panicum, 92. 
prunina, Lachnosterna, 122, 125. 
pubescens, Agriotes, 7, 34, 47. 
pulicaria, Chetocnema, VII. 
Pumpkins as food of adult Northern 
Corn Root Worm, 139. 
of adult Southern Corn Root 
Worm, 1831. 
Purslane, 28, 53, 65. 
as breeding plant of Corn Root 
Aphis, 538, 56-57. 
as fae of Pale-striped Flea-beetle, 
destroyed by White Grubs, 99. 
infested by Solenopsis debilis, 9. 
by an unidentified larva, 138. 
Pyralis farinalis infesting potatoes, X. 
R 
Raccoon as enemy of White Grubs, 109. 
-radicola, Tychea, 83. 
Ix 
Ragweed, 137. 
as food of Corn Root Aphis, 53. 
of Pale-striped Flea-beetle, 19. 
of Soatean Corn Root Worm, 
a, 
blossoms and pollen as food of adult 
Northern Corn Root Worm, 
1387, 142. 
Rape injured by Wireworms, 26. 
pails clear earth of Wireworms, 
Raspberries injured by adult Banded 
Ips, 21. 
leaves eaten by adult Southern Corn 
Root Worm, 131. 
by May Beetles, 101. 
Red Clover blossoms as food of adult 
Northern Corn Root Worm, 139. 
-shouldered Hawk as enemy of 
White Grubs, 108. : 
-tailed Hawk as enemy of White 
Grubs, 108. 
Remedies and preventives for insect dep- 
redations: arsenic, 43, 
arsenical poisons, 11, 48, 118, 
116. 
ashes, wood, 67, 68. 
bisulphide of carbon, 44. 
clean fallow, 43. 
coal-tar, 67. 
collection and destruction, 112, 
113-115. 
copperas, 43. 
and chloride of lime, 43. 
eorrosive sublimate, 48. 
cultivation of buckwheat, 43. 
of mustard, 48. 
of rape, 43. 
destruction of Ants’ nests, 66, 
68 
fertilizers, 65, 113. 
and insecticides, 66-67. 
food lures, 42. 
Fowler’s solution, 48. 
gas-lime, 44. 
infection material, IX, 117-120. 
jarring, trees, 1138, 114-115. 
kainit, 44, 116. 
kerosene, 43, 115. 
emulsion, 43, 116. 
late fall plowing, 31, 42, 69, 70. 
planting of corn, 42, 66. 
light-traps, 118, 115. 
lime, 44, 67, 68. 
chloride of, 44. 
London purple, 11. 
muriate of potash, 44. 
and petroleum, 67, 
Paris green, 11, 42. 
and flour, 13. 
pasturing of pigs, 112, 113. 
petroleum, crude, 43. 
and fertilizers, 67. 
emulsion, 43. 
potash salts, 143. 
potassium cyanide, 43. 
rotation of crops, 42, 44, 51, 66, 
70, 96, 118, 134, 142. 
salt, 43, 67, 68. 
spraying, 113, 116. 
starvation, 69. 
strychnine, 438. 
sulphate of potash, 67, 116. 
and petroleum, 67. 
superphosphates, 67. 
and petroleum, 67. 
tar, 48. 
turpentine, 43. 
Reptiles and Amphibians as enemies of 
White Grubs, 111. 
Rhizobiine, 89, 938. 
