No. 1, Jult, 1920| PATHOLOGY 195 



1283. Faoll, J, H. Manual of tree diseases. [Rev. of: Ravkin, W SoWABD Manual 

 of tree diseases. 398 p. 7 fig. M acm ill an Co. : New York, 1918.] Bot Gas. 67: 969. 1919. 

 — This is the first American book on the diseases of forest trees, and il will be welcome bees 



containing the only available summary of such diseases. A COD.1 ribul ioD of prime import M 

 is thai i be 1 took points out the direction thai should be followed I", ubsequenl invesl igal iom 

 [See Bot. Absts. 2, Entry 782.]—//. C. Cowl 



128t. Federal Bobti cultural Boaud, 1 . S. Dept. \<:hk\ Ann Rept. Ped. Hortic. 

 Bd. 1918. 82 p. 1919. — Attempts to eradicate pink t>oll worm of cotton in eastern Tea 

 apparently have !>een successful. A new infestal ion in western Texas bas been brought under 

 control. Aeroplanes were used for locating cotton Gelds in tin- section which ifl wooded and 

 Bparsely settled. — European corn borer is now t bought t o bave been inl roduced in1 o I be ' farted 

 States in 1910 on Hungarian broom corn. — Potato wart (Chrysophlycti i endobiotica) has been 

 located in new areas in Pennsylvania and has been found in West Virginia, [rish Cobbler 

 and Rose 4 varieties of potato were apparently immune. Immune varieties from the British 

 Isles are being brought in for propagating stock. — Flag smut (Urocyxlis tritirti ami take-all 

 (Ophiobolus gramiuis) have been found in the United States. Efforts are being made to eradi- 

 cate the diseases in the limited areas in which they occur by burning straw and stubble, dis- 

 infection of the grain and of the separators, and elimination of the growth of wheat in the in- 

 fested areas for a period of years. — There are also included in this report: data on country of 

 origin and nature of nursery-stock importations, and on distribution of such stock in the 

 Inited States; inspection of imported plants and plant products; need for enlargement of 

 port inspection service. — A list of current quarantines and other restrictive orders is given. 

 — D. Rcddick. 



1285. Fennel, E. A., and M. A. Fisher. Adjustment of reaction of culture medium. 

 Jour. Infect. Diseases 25: 444-451. 1919.— See Bot. Absts. 4, Entry 1451. 



1286. Florin, R. Om appletradens skorvsjuka och dess bekampande. [Apple scab and 

 Its control.] Sveriges Pomolog. foren. Arsskr. 1918:69-76. 9 fig. 1918. 



1287. Foex, Et. Une maladie des Epinards. [A disease of spinach.] Bull. Soc. Path. 

 Veg. France 6: 35-36. 1919. — A disease of spinach (Spinacia oleracea) is briefly described. It 

 seems to show close resemblance to the American spinach blight. The work of McClintock 

 and Smith is referred to. — C. L. Shear. 



1288. Foex, Et. L'oidium brun des Euphorbes. [The brown Oidium of Euphorbia.! 

 Bull. Soc. Path. Veg. France 6: 31-34. 1919— See Bot. Absts. 4, Entry 1097. 



1289. Fromme, F. D., and G. S. Ralston. Dusting experiments in peach and apple 

 orchards. Virginia Agric. Exp. Sta. Bull. 223. 16 p. Fig. 1-2. 1919.— The work was conducted 

 during the season of 1919 in four orchards on four varieties of peaches and two varieties of 

 apples. Two dusting mixtures were used on peaches, a 90 sulfur-10 lead arsenate, and a 50 

 sulfur-40 filler-10 lead arsenate Both gave satisfactory control of curculio and scab (Clado- 

 ■;■ ruim carpophilum) but neither provided a satisfactory control of brown-rot (Srh rotinia 

 chicrca) the percentage of brown-rot ranging from 24 to 45 per cent in the dusted plots of the 

 Champion variety to 53 per cent in the check. A Bordeaux dusting mixture and a 90 sulfur- 

 10 filler-10 lead arsenate mixture were used on apples. Both of these proved very unsatis- 

 factory in the control of bitter rot (Glomerclla cingulata) on the Albemarle Pippin variety, 

 76 per cent of the fruit being affected in the plot receiving Bordeaux dust, 63 per cent in the 

 'A>-10-10 plot, 9 per cent in the plots sprayed with Bordeaux mixture, and94 per cent in the 

 check. Both dusting mixtures gave satisfactory control of codling moth and proved as 

 efficient as the liquid. Bordeaux dust gave a very satisfactory control of blotch [PhyUosticta 

 solitaria) and leaf-spots (Sphacropsis malonan) on the Ben Davis variety, the amount of 

 blotch on the fruit being reduced from practically 100 per cent in the check plot to 4 per cent 

 in the dusted plot. — F . D. Fromme. 



