1044 EXPERIMENT STATION RECORD. 



At Geneva, G sprayings with Bordeaux mixture resulted in an increased 

 yield of 'Si) Itu. per acre, while 3 sprayings gave an increase of 29.5 bu., although 

 both early and late blight were wholly absent and there were but few flea 

 beetles. The chief trouble in 11)08 was tij) burn. There was no rot observed. 

 At Uiverhead the gain due to 5 sitrayings was 1G.3 bu. i)er acre and to 3 

 sprayings 10.75 bu. 



In the farmers' business experiments, including 200 acres, the average gain 

 due to spraying was 18.5 bu. per acre, with a net profit of $S..")3. In 5 of the 

 experiments, spraying was unprofitable. 



Eleven volunteer experimenters reported gains averaging GG.3 bu. per acre. 



Potato spr.aj-ing in dry seasons, F. H, Hali. {Nciv York titatc Sta. Bull. 

 307, 311, po/jitliir cd., pp. JO). — This is a popular edition of Bulletin 307 of the 

 station iirevidusly noted (E. S. K., 20, p. 948) and of Bulletin ."Ml, noted above. 



Treatment for scab and early blight on potatoes and mildew on cucumbers 

 and cantaloups, T. C. Johnson ( Virginia Truck Uta. Virc. 1, pp. 2-8). — The cor- 

 ro.^ive sul)liniate and formalin methods of treating seed i>otatoes for scab, and 

 the use of Bordeaux mixture for preventing the early blight of potatoes and for 

 spraying cantaloui)S and cucumbers for the prevention of mildew are described. 



[Spraying experiments with, cantaloups], J. Tkoop and C. G. Woodbury 

 (Indiuiiu tsta. lipt. 11)08, pp. 3')-31). — The results of spraying cantaloups with 

 a 5: 5: 50 Bordeaux mixture for the prevention of rust are given. In these ex- 

 periments 3.54 acres of cantaloups received 5 ai)plicati(ms of the fungicide, 

 the tirst being made about the time the rust spots began to appear, which was 

 a few days subsequent to the setting of the fruit. The other api»iications fol- 

 lowed at intervals of 1 to 2 weeks. As a result of the spraying, a net profit of 

 $11.49 per acre was obtained. 



Melon wilt, J. Troop and C. G. Woodbury (Indiana Sta. Rpt. 1908, pp. 30, 

 SI). — Au account is given of an attempt to discover the means by which the 

 bacterial wilt of cucurbits (Bacillus tracheiphilus) is carried from plant to 

 plant. Forty hills of cantaloups were grown in pots sunken in the ground. 

 The soil for half of the pots was sterilized, while in the others it was uusteril- 

 ized, and half of the hills of both sterilized and unsterilized soil were covered 

 with screens. 



From the results of the experiments, it seems probable that soil sterilization 

 had but little effect and that the disease is largely spread by insects. 



The gooseberry mildew, J. Eriksson (Prakt. Bl. Pflanscnbua u. Schutz, 

 n. scr., G (1908), No. 11, pp. 121-126). — An account is given of the introduction 

 and distribution of the gooseberry mildew (Sphwrothcca mors-uva') into Europe 

 and attention called to its destructiveness, the various host plants, the time and 

 I)eriods of infestation, and the results of spi'aylng experiments. The author 

 suggests the cutting out and burning of all diseased plants, so far as possible. 



Exosmosis in the roots of plants and combating chlorosis, G. Truffaut 

 (Jour. Soc. \at. Hort. France, -J. scr., 9 (19118), Dec, pp. 109-113). — By means 

 of hyacinth bulbs the author has been able to demonstrate the exosmosis of the 

 sulphates of iron, potash, and magnesia placed in cavities of the bulbs. The 

 sulphuric acid found its way into the distilled water in which the bulbs were 

 grown through the roots developed by the plants. Acting upon this suggestion 

 some fruit trees sutTering with chlorosis due to an excess of lime were bored 

 into and sulphate of iron placed within the trunks. The sulphuric acid in the 

 iron cominnmd was found to attack the lime deposits within the trees and 

 apparently to permit the absorption of other elements needed by the plant. 



Apple blotch, a serious disease of southern orchards, W. M. Scott and 

 J. B. RoBEK (V. S. Dcpt. Agr., Bur. Plant Indus. Bui. lJ,.'f, pp. 28, pis. 6).— As a 



