52 EXPERIMENT HTATION I{E(^()K1). 



scarcely :i [ihinl was free fnnii il, yet only a few jilants were ciiniplctcly iMiiiicil. 

 Wlu'ii the (•al)l)afi;o was harvi'stcd coiiiiJarisoiiK were made of the yield from each of 

 the luilf-acres. Ah the result of the treatment it was found there was a loss at the 

 rate of 5| tons i)er acre due to the removal of the leaves, in addition to the exijense 

 of the treatment, whieh is estimated at $11.62 per acre. The puliinj^ of the leaves 

 seems to check the formation of the heads and there is apparently evidence to show 

 that the disease spreads not only through the leaves, but can gain entrance to the 

 plants coming from the soil to the stems through the roots. Infection can also occur 

 at the base of the leaves close to the stem, the organisms passing down the fibrovas- 

 cular bundles into the stem, where it is beyond control. 



Experiments with cauliflower for the prevention of the same disease have given 

 results which warrant the continuation of the experiments of spraying the cauli- 

 flower with a resin-Bordeaux mixture. An experiment was conducted to determine 

 how the removal of the lower leaves affects the yield of the cabbage j)lant. In this 

 experiment alternate rows of cabbage had the 10 lower leaves removed with the 

 result that the check rows gave a larger number of marketable heads of greater 

 average weight than those which had had their lower leaves removed. The differ- 

 ence in this case was at the rate of 3 tons per acre. 



iin unsuccessful cabbage-rot remedy, F. H. Hai,l, F. C. 8tkwart, and H. A. 

 Hardinc; {Xew ^'ork Stah' /S'/a. Hid. j33, po]niI<ii cL, ]>ji. 9, fiij. 1). — A pojjular sum- 

 mary of the aT)ove bulletin. 



A disease of the branches of fig, A. Prunet {CompL Bend. Acad. ScL Paris, 

 136 {1903), No. 6, pp. 395-397; Protj. A;/r. ct Vit. {Ed. L'Est), '24 {1903), No. 10, pp. 

 31,5, 316). — According to the author, lig trees in the southwest of France are particu- 

 larly subject to a disease which destroys the younger branches. This disease is 

 attributed to attacks of Botrytis which is developed in the fruit remaining upon the 

 trees during winter. Ordinarily the immature fruits in autunni remain on the trees 

 and are attacked by this fungus. The fruits become mummified and bear upon their 

 surfaces the fructification of the Botrytis. During mild weather the spores begin 

 germination and si)read through the peduncles of the fruits to the^young twigs, caus- 

 ing their destruction. Another method of distribution is through the softening and 

 falling from the branches of the decaying fruits. These frequently fall upon other 

 branches and remaining there spread the infection from these centers. As a means 

 for tlie prevention of this disease the author suggests the removal from the trees of 

 all fruit at the end of Ww season. 



The control of the sooty mold of the olive, I). Vidal {Prog. Agr. cl Mt. {Ed. 

 L'Est), ^4 {1903), No. 14,2)p- 439, 440). — The relationship between insects and fungi 

 in producing the sooty mold of olives is shown, and the remits given of a number of 

 treatments in which Bordeaux mixture was used in connection with kerosene emul- 

 sion and Bordeaux mixture and turpentine. These treatments were found to be 

 quite efficient, and in combating this disease a combined insecticide and fungicide 

 should 1)6 used. The best results in his experiments were obtained with the 

 Bordeaux mixture and turpentine solution. The spraying should be thorough, 

 and can be done at a cost of about 5 cts. per tree per year. 



The bitter-rot fungus, H. von Schkenk and P. Spaulding {Science, n. .scr., 17 

 {1903), No. 436, pp. 750, 751). — As a result of the study of the synonymy of the bitter- 

 rot fungus {GliKospor'mm fructigenum) the authors claim that the name should be 

 Glomerella rufomaculans, n. sp., the previous names being preoccupied. The other 

 well-known species of Glocosjiorium of this same group, according to the authors, 

 would become O'lomerella cingulata, (I. piperaiinn, (,'. cinclitm, and G. rubicolum. 



Collar rot of the orange, C. Fuller {Agr. Jour, and Mhi. Eec, 6 {1903), No. 5, 

 pp. 150, 151) . — The occurrence of collar rot, root rot, gum disease, yellow leaf disease, 

 etc., in Natal is noted, and the author points out the identity of the diseases which 

 have been given these various names. The collar rot, as he prefers to call the trouble, 



