CONTENTS. V 



DISEASES OF PLANTS. 



Page. 



Bacterial diseases of plants, Potter 844 



Plant diseases and crop rotation, BoUey 844 



Notes on vegetable pathology, Griffon and Maublanc 844 . 



Plant diseases of 1909-10, Giddings 844 



Okra wilt, Fusarium vasinfectum, and clover rhizoctoniose, Stevens and Wilson. 844 



The present status of the question of rust propagation, Beauverie 844 



Perennial gametophy tic and sporophytic generations in Puccinia obtegens, Olive . 844 



Infection experiments with parasitic fungi, Treboux 845 



Myxofusicoccum, a new genus of Sphaeropsidearum, Diedicke 845 



O'idium tuckeri and Uncinula americana in Poland, Brzezinski 845 



Neutralizing nematode injuiy, Kriiger 845 



A canker of Glycine, Pavarino 845 



Bunt and germination experiments, Hurst 845 



Combating rust of cereals, Tonnelier 846 



Rusted grain and the wintering of the rust fungus, Eriksson 846 



A new smut of grass, McAlpine 846 



Downey mildew of alfalfa, Brittlebank 846 



The control of cotton wilt and root knot, Orton and Gilbert 846 



A bacterial disease of onions, Giampietro 846 



Bacterial rots of the potato, Schuster 846 



A bacterial disease of the potato plant in Ireland, Pethybridge 847 



(3n the cause of blindness m potato tubers, Dale 847 



A bacterial disease of potato leaves, Dale 847 



Experiments with potatoes resistant to wart disease 847 



Potato spraying in 1909 and 1910, Giddings 848 



Spraying potatoes, Pinn 848 



A review of literature relating to pests of the sugar beet, Stift 848 



Biochemical study of the curly- top disease of sugar beets, Bunzel 848 



Observations on the smut disease of sugar cane, Basu 848 



The root rot of tobacco caused by Thielavia basicola, Gilbert 849 



Tomato leaf rust 849 



European and American Glceosporiumfructigenum, Schneider-Orelli 849 



Monilia on fruit trees, Voges 849 



Different wintering over of two species of Monilia and its significance, Ewert. . 849 



A study of diseases of olives, Petri 849 



The Cycloconium on the olive, De Michele 850 



Present knowledge in regard to the natvire of peach yellows, Morse and Fetzer. . 850 



Investigations on the dying of plum trees, Rabate 850 



Double blossom of the dewberry and the blackberry, Reimer and Detjen 850 



The leaf spot fungi of currants, Voges 850 



The chlorosis of grapes during the spring, Provost-Dumarchais 851 



How is the grape infected by mildew? Miiller-Thurgau 851 



Influence of temperature on conidia of downy mildew, Ravaz and Verge 851 



Roncet, Pantanelli 851 



The fungus diseases of cacao. Van Hall 851 



Diseases of orchids caused by bacteria, Pavarino 851 



A disease of tulips, Lendner 851 



The brown leaf spot of colt's foot. Wolf _ 852 



The development and cytology of Rhodochytrium, Griggs 852 



Tree diseases due to fungi, Farquharson 852 



A disease of pine due to Hypodermella, Lagerberg 852 



A new cryjitogamic disease of pine, Doroguine 852 



Disease of Pinus strobus due to Lophodermium brachysporum, Fron 852 



Recent observations on some diseases of white pine and yew, Fron 853 



A black knot disease of Dianthera americana, Lewis 853 



A disease of rubber during curing, Lonay 853 



A new wood-penetrating alga, Moore 853 



Copper fungicides, Pickering ' 853 



The use of copper oxychlorid as a fungicide, Chuard 853 



Testing sulphur and sulphur-copper sulphate mixtures, Slaus-Kantschieder 854 



ECONOMIC ZOOLOGY — ENTOMOLOGY. 



Annual report of the governor of Alaska on the Alaska game law, 1911, Clark 854 



West Virginia forest, game, and fish laws, and the Lacey bird law, 1911.- 854 



A note on a peculiarity of plague on the Hamakua Coast of Hawaii, McCoy 854 



