DISE ^SES "I I'l.w l B. 877 



these diseases by the use of a single fungicide the author recommends an alka- 

 line polysulphid added t«> a verdigris solution. 



Mildew and gray rot < /.'< v. I it., ."/ i 1905 I, So. 608, pp. 15, 16, pi. I. fig. 1). — 

 A description is given of the attack of Peronospora viticola on ili«' leaves and 

 emit of the grape. Upon the leaves it is called downj mildew and upon the 

 fruil it is designated usually as graj rot. Spraying with fungicides containing 

 some form of sulphur is recommended for the prevention of the dis< 



Treatment of black rot, L. Bebgeyre {Prog. Ygr. ct Vit. {Ed. VEst), 16 

 {1905), So. 13, pp. '>' s .' 684). The efficiencj of copper fungicides when properly 

 applied is shown, and the author comments «>n the effecl of humidity and a high 

 temi>erature on ihe rapid spread of the disease. 



1 Bually l sprayings will be found sufficient, the firsl of which should be 

 applied as the buds are swelling, tin- second 20 to ::<» days later, the third a1 the 

 beginning «»!' flowering, and the fourth after an interval of -<> to 30 days. The 

 first and third of these applical ions are said t.» he the most important, and the 

 necessity for the second and fourth will depend on the humidity of the 

 atmosphere. 



Black rot in Marmande, A. Gi v {Prog. Agr. et I it. {Ed. VEst), 16 {1905), 

 So. 26, pp. 772 7?'/ 1. An accounl is given of the tirsi and second periods of 

 black rol invasion during 1905. 



The flrsl appearance of the fungus was noted the latter pari of April, ;i few 

 spots showing here and there on the leaves, and the oexl invasion was observed 

 between May 27 and 29. The atmospheric conditions during this period are 

 described. Where sprayings were made before May •", the treatmenl was effi- 

 eienl in reducing the severity of subsequent attacks. This date corresponds i<> 

 a period of low- temperature preceding a rather heavy rain. Applications of 

 fungicides after tin' fain when the temperature was rising rapidly were much 

 less efficient. 



A remedy for the prevention of coulure, A. Beenet i Prog. Agr. < l I it. i Ed. 

 VEst), 26 {1905), No. •!■'>. />. 252). For the prevention of this disease, which is 

 probably of physiological origin, the author suggests the spraying of the Nines 

 some days before flowering with a solution containing :. kg. of iron sulphate to ;i 



hectoliter of water. This solution cheeks to son xteni the growth, which 



becomes vigorous again after the advenl of warm weather, and the now growth 

 shows no trace either of chlorosis or of coulure. 



Bud rot of cocoanut palm {Agr. News [Barbados'], ) {1905), \ '<>. 90, p. 

 299). — A description of ihis disease was previously given by 1". S. Earle (E. S. 

 R., 11. p. ssi ). and sin<-o i li.it time it has been reported .-is occurring in Central 

 America and throughout most of the countries surrounding the Caribbean Sea. 

 In some places it has become epidemic and lias destroyed many plants. 



Experiments carried on al the Public Gardens of Jamaica seem to indicate 

 thai spraying with Bordeaux mixture is beneficial when the applications are 

 made before the disease has progressed too far. This, beneficial use of Bor- 

 deaux mixture indic-ites thai the disease is not as deeply seated as has been 

 previously believed. On account of the seriousness of this disease, energetic 

 and concerted action is needed to keep it in check. 



A fungus on Para rubber leaves, II. \. Kim.iy {Agr. Unl. Straits "/"/ Fed. 

 Malay States, ) l 1905), \<>. 7. pp. .'7 / . 872). A brief accoubl isgiven of attacks 

 of :i species of Cercospora on the leaves of Para rubber plants. 



The fungus causes the occurrence of pale blotches upon the leaves and when 

 placed under conditions favorable to the growth of the parasite frequently 



destroys the leaves outright Excepl in the case of the s IlingS, the disease 



does not seem to do much harm, hut it checks the growth of young plants and 



