286 



sliould he soaked I'ilumrs; or it may be used in a solution twice as 

 strong:, allowing the seed to remain in it only 10 or lli hours. 



In previous exi)eriments, reported in the Annual Report of the station 

 for LS8J) and in Bulletins Xos. 15 and 21 (see Exi)erinient Station 

 Keeord, vol. ii, p]). 341! and 040, and vol. iii, p. 225), an extra increase 

 of yield was observed on the plats treated with hot water or potassium 

 sulphide. A further test of this matter in 1891 is rei>orted in detail iu 

 tables and illustrated in dia<jrams. 



The following is a summary of the results: 



Treatments (each on 6 plats). 



Vi.ld of 



grain pi'r 



acre. 



Increase 

 of yield. 



Extra in- 



oreaxc of 



yield. 



Untreated 



Uot water, USJ'^ F., .5 minutes 



U"it water, VUp V.. 10 niiniite.s 



Iliit w.iter, 1:UV^ v.. :{.} iiiincite.s (previously soitkwl 3 lioiir») 



Hot water. V.^Y' K., l.'i niiniit<s ' 



Jlot water, WIV^ V.. 10 niintitcs (not eoolid) 



Tota.ssinni ,>*iili>liide, ^ per eent soiiitinn. l^ hours 



Kesults expected from simply replacing smutted heads with sound 

 ones • 



BtmheU. Per cent. BtithcU 



SJ.IO I 



02.10 1 16. 



4.40 



3. m 



8. (K) 

 2.15 



* The seed being damp and swollen a smaller (juantity per acre was drille*!. 

 THSTS of FrN(JH"IDES TO IMIKVENT LOOSE SMUT OF WHEAT, W. A. 



Kelleioian, I'll. D. (pp. 81-1)0). — A summary of available information 

 regarding loose smut of wheat {Ustila go tritici) was given in tiic .\iiiiiial 

 I{ci>ortof the station for 1880 (see ExiMM-imeiit Station Kccord. vol. ii, 

 ]). 312), anil accounts of experiments with fungicides Ibr stinking smut 

 of wheat {TUU'iia faicnH and T. tritici) may be found in Uulletins Nos. 

 12 and 21 of the station (see Experinn'iit Station Keconl. \-ol. ii. p. 220, 

 and vol. Ill, p. 225). The anKUint of loose smut found un 25 \ ai^icties 

 of wheat grown at the station in 1801, as stated in a tabh', ranged from 

 to 1(> per cent. Tabulated data are given for experiments with 54 

 difterent methods of treatment tested on as many plats, alternate plats 

 r«'maiiiing untreated. The fiingicidt^s used were Ilordcaux mixture, eau 

 celeste, co]»per sulphate, ])otassium bichromate. coi»per nitrate, \"erdi- 

 gris, copper chloride, mercuric chlitiide. Ward's Seed Manure, and hot 

 water. Very little smut ai»i>eared (»n the untreated idats, and the data 

 reported do not conclusively favor any of the treatments. 



Spraying to prevent wheat ri st, W. A. Keleerman. Ph. 1). 

 {\^\). 00-03). — Notes and tabulated data for an exin'iiment in which 

 flowers of sulphur, jtotassium sulphide, chloride of iron, and liordeaux 

 mixture were ajtplied singly at intervals usually of 8 days from Ai»ril 

 21 to July 2, 18!)1, inclusive, on Fifeand lUue Stem s]>riug wheat. Chev- 

 alier, Four-llowed, Melon, Saal, Prize Prolific, and Algerian barley, and 

 P>lack Winter oats, with a view to ]>reventingred and black rust( Pucviuia 

 s]>.). The fungicides api»arently had little if any etfect. However, 

 attention is called to the fact that fre«inent rains may have materially 

 iuterfered with the success of the experiment. 



