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-t37 



Gcapes, 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 



Ueteropus [Pediculoides] venfrkosus, 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) fidise, parasite of grape root- worm 51, 5&-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 mixtxire 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 



PMhiracarus arctatus, enemy of grape root-worm 51 



Polychrosis vUeana, 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 



Ehizoglyphus phylloxerx, enemy of grape root- worm 51 



Rose-chafer. (See Macrodactylus subspinosits.) 



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 



Temperatiire records during breeding period of grape root- worm during 1903 at North East, Pa 43 



Typhlocyba comes, mention as enemy of grape 18 



Tyroglyphus [RMzoglyphus] 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 A mpelopsis quinquefolia.) 



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