454 EXPERIMENT STATION KECOKD. 



Ill April, 1008, the aiitlnn- isnhUctl 1lu' fun^'iis fnnu iiiatorial sont in for 

 examination, and he has carried on some pot experiments to determine the para- 

 sitism of the fnn.uns. After tlie plants had been {^rowin^ in i)ots for about 10 

 days pure cultures of the fuuf^us were mixed with the soil, care l)ein;; taken 

 not to injure the I'ootlets. In about 3 weeks some of the phiuts began to show 

 symptoms of the disease, and the fungus was recovered from the diseased 

 plants and additional plants inoculated as in the previous case. This seems 

 to show that the Fusarium attacks the plants through the soil, as the control 

 plants did nut contract the disease. The matter is to be studied further. 



Fiber rot of ginseng-, II. II. Wiiktzel (Spec. Crops, n. scr., 8 (lOO'J), No. 88, 

 pp. 2^^-232). — During the season of 1009 the fiber rot or end rot of ginseng 

 seedlings is said to have been very generjil and quite destructive throughout 

 New York and the eastern sections of the country where ginseng is grown. 

 The disease seems to be caused by the fungus Thielavia hasicola. An account 

 is given of investigations begun to test the value of acid phosphate and other 

 means for the control of the disease. 



Treatment for gray rot of grapes, E. Zaciiarkwicz {Prog. Agr. ct lit. (Ed. 

 rEst-Centrc), 30 (1909), Ao. .'/8, pp. GG-'i-666). — In a previous publication 

 (E. S. R., 15, p. 272) the author described a method of treatment which had 

 proved successful in the control of gray rot of the grape, due to BotryUs 

 cinerca. In the present paper the suggestions are repeated and somewhat 

 elaborated. 



The author recommends alternate applications of a liquid fungicide consisting 

 of sulphate of copper, powdered soap, and water, to be followed as soon as 

 dry by dusting with sulphur or with sulphosteatite and suli)hur. The first 

 treatment should be made when the new shoots have attained a length of 5 

 to 10 cm., and it is recommended that the application of the liquid be followed 

 with pure sulphui*. The second application should be made just before the 

 flowering period, to be followed at intervals with other applications, when 

 the sulphosteatite may be substituted for the sulphur, or sulphur, plaster, and 

 sulphosteatite may be combined. 



The adherence of copper fungicides on grape leaves, A. Marescalchi [Col- 

 tivatorc, 55 (1909), No. 11, pp. 531~53Ji). — The author gives an account of inves- 

 tigations of Porchet on the adherence of different strengths of Bordeaux 

 mixture and copper acetate. Solutions of Bordeaux mixture containing from 

 1 to 3 per cent copper and 0.5 to 2 per cent solutions of neutral copper acetate 

 were sprayed upon leaves and the amount remaining upon the leaves was 

 determined. It was found that the 1 per cent neutral copper acetate was as 

 adhesive as the 2 per cent Bordeaux mixture. In both cases the adhesiveness 

 of the copper compound diminished with the increase in the concentration of 

 the solution. 



The tendency to diminish the amount of copper employed in making up 

 fungicides is held to be justifiable, as a 1 per cent solution of Bordeaux mix- 

 ture is as efiicient in combating plant diseases as a 2 per cent solution, since 

 from the latter the excess of copper is soon removed by rain. 



Diseases of cacao, A. Maubi.anc (Agr. Prat. Pays Chniids, 9 (1909), Nos. 80, 

 pp. 393-407, pis. 2; 81, pp. 472-479). — On the basis of the notes and investiga- 

 tions of G. Delacroix, the author describes canker of cacao, witches' broom, root 

 rot, and various diseases of the branches, leaves, and fruits of cacao. 



A disease of Lavatera, F. J. Chittenden (Jour. Ron. Ilort. 8oc. [London], 

 35 (1909), No. 2, pp. 213-215, fig. J).— The author describes a disease of L. 

 trimestris due to the fungus Coll etot rich urn, malraruin. Repeated sprayings 

 with Bordeaux mixture have checked the disease but have not completely 

 stopped its progress. 



