100 THE GRAPE ROOT-WORM. 
Page. 
Grape root-worm, seasonal history 22-50 
variation in life history 41-44 
sprays in control 83-88 
summary of life-history studies 50 
temperature records during breeding period of 1909, North East, Pa 43 
treatment of injured vineyards 91-92 
vineyard renovation experiments, results 75-83 
vitality of newly hatched larva 35 
wintering of larva in earthen cell 36-37 
Grapes, wild, food plants of grape root- worm 13-14 
Grapevine Colaspis. (See Colaspis brunnea.) 
Fidia. (See Fidia longipes.) 
flea-beetle. (See Haltica chalybea.) 
Haltica chalybea, mistaken for grape root- worm beetle, description and habits 17 
IJeteropus [Pediculoides] ventricosus, enemy of grape root-worm 51 
Hippodamia convergens, enemy of grape root- worm 51 
Hoplophora [Phthiracarus] arctata, enemy of grape root- worm 51 
Insecticides and fungicides, combination 84 
Lachnosterna sp., enemy of grape root-worm 51 
Lasius brunneus var. alienus, enemy of grape root-worm 51 
Lathromeris (Brachysticha) fidix, parasite of grape root-worm 51,56-57 
Macrodactylus subspinosus, mistaken for grape root- worm beetle, description and habits 17 
Nozzle adjustment for spraying vineyards 89 
Nozzles for spraying vineyards 89 
Paris green and Bordeaux mixture against grape root- worm beetle 84 
comparison with arsenate of lead and arsenite of lime as insecticide 83-84 
Pediculoides ventricosus, enemy of grape root- worm 51 
Phthiracarus arctatus, enemy of grape root- worm 51 
Polychrosis vitcana, mention as enemy of grape 18 
Redbud. (See Cercis canadensis.) 
Red-headed Systena. (See Systena frontalis.) 
Renovation experiment on old vineyard injured by grape root- worm 75-80 
young vineyard injured by grape root-worm 80-83 
Rhizoglyphus phylloxerse, enemy of grape root-worm 51 
Rose-chafer. (See Macrodactylus subspinosus.) 
Spraying apparatus, care 89 
for vineyard use 88-89 
Spray formula recommended against grape root- worm beetle 90 
mixture, plants for preparation 85 
Sprays against grape root- worm beetle 83-88 
number of applications 86-87 
pressure in applications 88 
time of application ' 86 
Staphylinus vulpinus, probable enemy of grape root- worm , 51 
Systena frontalis, mistaken for grape root-worm beetle, description and habits, remedy 17-18 
Telephorid enemy of grape root- worm 51 
Temperature records during breeding period of grape root-worm during 1909 at North East, Pa 43 
Typhlocyba comes, mention as enemy of grape 18 
Tyroglyphus [Rhizoglyphus] phylloxerx, enemy of grape root-worm 51 
Vineyard conditions in Lake Erie Valley 57-59 
experiments with poison sprays against grape root- worm beetle, results 70-75 
renovation experiments against grape root- worm, results 75-83 
Vineyards, recommended treatment of those injured by grape root-worm 91-92 
Virginia creeper. (See Ampelopsis quinque folia.) 
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