892 



Potato blight and rot (pp. 17-24). — Accounts are given of successful 

 experiments witli Bordeaux mixture for jjotato blight and rot at the 

 station and in different localities in the State, in continuation of those 

 rei)orted in Bulletin 'So. 14 of the station (see Experiment Station Rec- 

 ord, vol. II [, p. 101). The gain in yield much more than repaid the (•»)st 

 of spraying, which is estimated at 82.50 per acre for each application. 

 It is recommended to dig the potatoes as soon as practicable after the 

 tops are blighted. 



A new i)ota1o disease (pp. 25-27). — A brief account of a disease of 

 potatoes inevnlent in Vermont in 1891. The ditterences between bliglit 

 and this new disease are stated as follows: 



(1) The blij^lit attacks the leaf at any ]i<iiut and generally works rapidly; in the 

 new disease the leal'heyins (lying at tlio tip and dies slowly Itaekward, the leaf dry- 

 ing and curling meanwhile, and the whole jtrogress of the disease is comparatively 

 slow. 



(2) In the true l>li;;ht the black spot.s on the h-aves are fringed on tlie underside 

 by a delicate fungous growth; in the new disi-ase this is never found. 



(3) The true blight may be exjiected in the latter part of the summer, especially 

 iu August, and only «luring warm, wet weather; the new disease may be exi>eeted 

 earlier, ami develojis in cooler and dryer weather. 



(4) Following the blight the ttibers may be exjjected to sliow more or less of rot. 

 especially of the dry mt, if the soil is heavy or nuiist. No such roll in;,' of the I iibcrs 

 occurred last year iu Vermont as a consequence of the new disease. 



Bordeaux mixtnie was used for its rei>ressi<>n without aii.\ marked 

 ellect. 



J'niato scab (pp. 28-30). — A brief summary <»f information compiled 

 from the Annual Kei)ort of the Connecticut State Station for 1801 and 

 IJidletiu No. 4 of the North Dakota Station (see Experiment Station 

 Keconl, vol. ill, pp. 010 and 771). 



Appir and prtir svab (i>p. 3(>-."i4). — Hrief accounts ot' experiments in 

 which animoniacal carbonate of copper was used on i)ear and apple 

 trees and IJoideauv mixture on apple trees. Both iiingicides larg«'ly 

 reduced the amount olscab, but Bordeaux mixture is ]Melerred for the 

 following reasons: 



(1) Tile dilute Uoidcaux mixture is a iiulf rJii'iiiM-r tliau tiie aiiiniouiacal copper 

 carbonate. 



(2) Paris Circen for the codling moth may be mixetl with the Oordeaux mixture, 

 but when mixed witli the amnuuiia solution is liable to Iturn the leaves. 



(3) The Bordeaux niixture is not easily washed otf l)y rains. 



On the other hand the ammoiiiaeal solution has no sediment and hence is more 

 easily ajtplied and does not leave any trace of the copper salt on the fruit. It may 

 be preferabk', therefore, for the last application to use the ammoni.acal solution. 



Oat stinii (\)\). 'M-'.jCi). — Brief statements regarding the prevalence of 

 oat smut in ^'el•IU(»nt and the hot water method for its repression. 



West Virginia Station, Bulletin No. 22, February. 1892 (pp. 37). 



"NVkkds of West Virginia, ('. F. Millspaugh, M. D. (pp. 177- 



L'12j. — This is in contituiation of the article in llulletin No. 10 of the 



