AGRICULTURAL INDEX 



843 



Plant cells and tissues — Coittiinird 



Variations in the osmotic concentration of 

 the suard cells din-ing- tlie opening: and 

 closing of stomata. R. G. Wiggans. bibliog 

 Am J Bot 8:80-40 Ja '21 

 Viability of detached root-cap cells. L. 

 Knudson. Am J Bot 6:309-10 Jl '19 

 See aluo Karyolvinesis; Osmotic pressure 



Photomicrographs 



Palm and pine, il Country Life 35:39 Mr '19 

 Plant chemistry. See Plants, Chemical analy- 

 sis of 

 Plant diseases. See Plants — Diseases and pests 

 Plant fluids. See Sap 

 Plant geography. Sea Botany — Ecolosy: I'lants, 



Geof^raphical distribution of 

 Plant growth. See Growth (plants) 

 Plant injection. See Trees — Injection of chem- 

 icals 

 Plant introduction 



American association of nurserymen; the 

 Gould bill. J; Watson. Am Flor 53:736 O 25 

 '19 



American plants in England. W. Roberts. 

 Gard Chron (Lond) 67:52 Ja 31 '20 



China's contributions to the woiid's food. D: 

 Fairchild and W. T. Swingle, il World Ag 

 2:102-3 Jl '21 



Foreign plant introduction medal. D: Fair- 

 child, il J Heredity 11:168-73 Ap '20 



Inventory of seeds and plants impoi'ted by the 

 Office of foreign seed and plant introduction 

 during the period from October 1 to De- 

 cember 31, 1915. U S Ag Bur Plant In- 

 dustry Inventory 45:1-66 '18 



Inventory of seeds and plants imported by 

 the Office of foreign seed and plant intro- 

 duction during the period from Jan. 1 

 to March 31. 1916. il U S Ag Bur of Plant In- 

 Industry Inventory 46:1-97 '19 



Inventory of seeds and plants imported by 

 the office of foreign seed and plant intro- 

 duction during the period from April 1 to 

 June 30, 1916. il U S Ag Bur Plant Industry 

 Inventory 47:1-96 '20 



Inventory of seeds and plants imported by the 

 office of foreign seed and plant introduc- 

 tion during the period from .Julv 1-Sept. 30, 

 1916. il U S Ag Bur Plant Industry Inven- 

 tory 48:1-56 '21 



Xew crops for home gardens. C. W. Moores. 

 il House Beautiful (41 Mt Vernon st, Boston 

 25c) 45:128-30 Mr '19 



Xew plant immigrants. Rural N T 78:611, 

 1453, 1537 Ap 5, O 4, 18 '19 



New plants enrich nation's agriculture — great 

 possibilities in search for crops. Weekly 

 X L 8:10 D 15 '20 



Plants for winter effect in southern Florida. 

 E. Heppler. Gard Chron Am 24:393-4 D '20 



Plants introduced to horticulture from Chile 

 and Argentina (including Patagonia and 

 Fuegia). W. B. Turrill. Royal Hort Soc J 

 46:346-50 My '21 



Plea for the exotic. A. C. Burrage. (B. 5) 

 17-23p '21 Mass. hort. soc, Boston 



Searching the world for plants. H. H. Biggar. 

 il Dakota F 41:296 F 15 '21 



Seed and plant introduction, il Am Flor 57: 

 178 Ag 13 '21 



Testing new foods. D: Fairchild. il J Hered- 

 ity 10:17-28 .Ta '19 



Testing of a new tree crop for hardiness. D: 

 Fairchild. il J Heredity 9:368-71 D '18 

 See also Agricultural exploration 

 Plant juices. See Sap 

 Plant labels 



Concerning labels. H. E. Durham. Gard 

 Chron (Lond) 67:270 My 29 '20 



Few hints on labelling in experimental sta- 

 tions. T. S. Vankataraman. il Ag J of India 

 15:45-50 Ja '20 

 Plant lice 



Anoplura from South African hosts. G. A. H. 

 Bedford. (In Rep., 1918, p. 711-3C) il 10s 

 '19 Union of South Africa, Dir. of 

 veterinary research. Cape Town 



Ants and aphids. P. Fontanel. (In Report, 

 Quebec Soc. for the protection of plants, 

 1918, p. 52-7) '18 Quebec Ag Dept 



Ants and the company they keep. G. W. Iler- 

 rick. Rural N Y 79:872 My 1 '20 



Aphides and frost. J. G. Blakey. il Gard Chron 

 (Lond) 67:78 F 14 '20 



Aphids or plant lice. A. I. Bourne. Mass Ag 

 Ext Leaflet 31 3p n.d. 



Aphids: their human interest. A. C. Baker. 

 (/« Rep., Entom. sec. of Ontario, J-918, p. 

 28-32) '19 Ontario Ag Dept 



Contribution to the knowledge of the group 

 aphidina. familv aphididae (homoptera). O. 

 W. Oestlund. (In 18th Rep., p. 63-i5) "20 

 Minn. State entom., St Paul 



Contribution to knowledge of the tribes and 

 higher groups of the family of aphididae 

 (homoptera). O. W. Oestlund. (In Rep., 

 1918, p. 46-72) 'IS Minn. State entomologist, 

 University Farm. St Paul 



Control of aphids injurious to orchard fruits, 

 currant, gooseberry and grape. A. L. Quain- 

 tance and A. C. Baker, il Farmers' B 1128: 

 1-48 '20 



Control of aphis. L. H. Reichel. Market 

 Growers J 26:274 Ap 1 '20 



Controlling aphis on farm crops by the use of 

 ladybugs. A. F'rank. il Western Wash Ag 

 Exp B V 6:133-5 D '18 



Does experimenting with native predatory 

 insects pay. E. G. Wood, il Better Fruit 

 14:6-7 N 19 



Farm insect life — plant lice, il Successtul F 

 20:52 Ja '21 



Flights and frivols of the aphids. E. M. 

 Patch, il Gard M 31:100-1 Ap '20 



Food plant catalog of the aphididae of the 

 world. E. M. Patch. Maine Ag Exp Rep 

 1919:219-48 



Generic classification of the hemipterous 

 familv aphididae. A. C. Baker, il U S Ag 

 Dept B 826:1-109 '20 



Genetic relations of the winged and wingless 

 forms to each other and to the sexes in 

 the aphid macrosiphum solanifolii. A. F. 

 Shull. bibliog Am Naturalist (Science Press, 

 Garrison, N.Y. 40c) 52:507-20 O '18 



Kaolin dust for aphis. Am Flor 56:485 JNIr 26 

 •21 



Lice on lettuce. C. W. Waid. Market 

 Growers J 24:380 Je 1 '19 



Life history and biology of the pink and green 

 aphid (macrosiphum solanifolii Ashmead). 

 L. B. Smith, bibliog il Va Truck Exp B 27: 

 27-79 '19; Abstract. Exp Sta Record 41:662- 

 4 N '19 



Miscellaneous studies in the family aphididae 

 (hem. hom.). A. F. Swain. Entom News 32: 

 209-13, 225-9 Jl-O '21 



Mobilizing a lady bug army to fight the 

 aphis. H. E. Thomas, il Sci Am (233 Broad- 

 way, N.Y. 10c) 120:507 My 17 '19 



Most common plant lice or aphids. AV. Loch- 

 head. (In Report, Quebec Soc. for the pro- 

 tection of plants, 1918, p. 79-88) il '18 Que- 

 bec Ag Dept 



Plant lice on farm crops. R. A. H. Gray. Live 

 Stock J 90:539 D 5 '19 



Some apple and cherry aphids. F. L. Siman- 

 ton. Mich Hort Soc Rep 1917:70-6 



Some experiences with aphids. S. D. Conner. 

 Gard M 30:117 O '19 



Some important orchard plant lice. T. J. 

 Headlee. il N J Ag Exp B 328:1-27 '18 



Some Japanese aphididte. E. O. Essig and 

 S. I. Kuwana. (Pro. 4th ser. v. 8,no. 3) 35- 

 112p '18 Cal. Academy of sciences, San 

 Francisco (45c) 



Spinach blight and its transmission by in- 

 sects. L. B. Smith. (In Report, 1917, p. 40- 

 58) il '18 Va. State entomologist and plant 

 pathologist, Richmond 



Study of the plant lice injuring the foliage 

 and fruit of the apple. R. Matheson. bib- 

 liog il Cornell Ag Exp Memoir 24:683-762 

 '19; Same. Cornell Ag Exp Rep 1919, v 1: 

 683-762 '20; Abstract. Ag Gaz of Canada 

 7:363-4 Ap '20 



