402 PATHOLOGY [Bot. Absts. 



2760. Shepherd, J. F. Spraying tests at Te Kauwhata. Jour. Agric. [New Zealand] 16: 

 228-230. 1918. — Various modified Bordeaux mixtures were tested on dormant pear trees for 

 the control of scab (Venhiria pirina). None decreased the amount of scab. — Later treat- 

 ments with Bordeaux mixture gave excellent control. Pickering's Bordeaux was not effective 

 nor was lime-sulfur solution at the strength at which it can be used with safety (1 : 80). — Lime- 

 sulfur solution (1 : 100 or weaker) and atomic sulfur (about 1 : 10) gave equally satisfactory 

 control of apple mildew. — D. Reddick. 



2761. Silberschmidt, W. Kritik unserer Anschauungen iiber Desinfektion und Desin- 

 fektions-Mittel. [A criticism of our views concerning disinfection and disinfectants.] Corre- 

 spondenzbl. Schweiz. Aerzte 49: 593-600. 1919. 



2762. Small, W. Annual report of the Government botanist 1917-18. Ann. Rept. Dept. ♦ 

 Agric. Uganda Protectorate 1917-18: 52. 1918. — Brief account of most prevalent plant dis- 

 eases on coffee, cacao, and Hevea during the year. — Anna E. Jenkins. 



2763. Smith, Annie Lorrain. Hyphomycetes and the rotting of timber. Trans. British 

 Mycol. Soc. 6: 54-55. 1918. — In addition to Meridius lacrymans, the author reports two hy- 

 phomycetes found attacking timbers in houses. Torida abbreviata Cda. was isolated from dark 

 speckles in wood from portion of beam from modern house in Surrey. Fructifications of a 

 Haplographium resembling most nearly H aplographium finitimum Sacc. were found in dark- 

 ened disintegrated portions of beam from old house in Suffolk. — Anna E. Jenkins. 



2764. Smith, J. W. The effect of weather upon the yield of potatoes. Potato Mag. I 10 : 

 11-14, 32; 1": 15-17; l 12 : 7, 16-17, 27; 2 1 : 16-17, 33-34. Fig. 1-28. 1919.— See Bot. Absts. 3, 

 Entry 1886. 



2765. Soursac, L. Maladies du prunier. [Plum diseases.] Prog. Agric. et. Vitic. 69: 

 180-185. 1918. 



2766. Stakman, E. C, H. K. Hayeb, Olaf S. Aamodt, and J. G. Leach. Controlling 

 flax wilt by seed selection. Jour. Amer. Soc. Agron. 2: 291-298. PI. 9. 1919. — The authors 

 report the results of four years of selection of flax which is resistant on "flax-sick" soil (soil 

 infested with Fusarium lini). Experiments conducted at Waseca and University Farm, Min- 

 nesota, have given good results by the bulk method of selection and it has been shown that 

 by careful selection a good crop of flax may be produced on heavily infested soil. — F. M 

 Schertz. 



2767. Stewart, F. C. Notes on New York plant diseases, II. New York Agric. Exp. 

 Sta. [Geneva] Bull. 463: 157-188. PL 1-8. 1919.— A collection of short notes on diseases pf 

 cultivated plants, viz., diseases caused by Peronospora trifoliorum, Ascochyta imperfecta, and 

 Pyrenopeziza medicaginis on alfalfa; Leptosphaeria coniothyrium on apple; Bacillus caroto- 

 vorus on carrot and Amorphophallus simlense; Gnomonia leptostyla and Microstoma juglandis 

 on butternut; Phoma lingam and a sclerotial fungus on cabbage; Sclerolinia libertiana on car- 

 rot; Cecidomyia catalpae on catalpa; Sclerolinia cinerea on sand cherry; Fomes applanatus 

 and Coccomyces hiemalis on cherry; Gloeosporium caulivarum, Pseudopeziza trifolii, Rhizoc- 

 tonia sp., and Cercospora sp. on clover; Pythium debaryanum on cucumber; Pseudopeziza 

 ribis, Cercospora angulata, Fomes ribis, Sphaerolheca mors-uvae, Hypholoma perplexum : and 

 Botrytis sp. on currant; and Mycosphaerella ulmi on elm: also, diseases of non-parasitic or 

 undetermined origin, viz., fruit-pit and stem-constriction disease of apple; stem-and-root 

 disease of apples and pears; black leaf-speck of cabbage; winter injury of cherry; yellow leaf 

 of cherry and elm; crinkle leaf, fruit drop, sunburn, tipburn, imperfect buds, and witches' 

 broom on currant; and trunk injury and a branch disease of elm. — F. C. Steicart. 



2768. Stift, Anton. Bemerkenswerte Mitteilungen iiber das Auftreten von tierschen 

 Feinden und Krankheiten der Zuckerriibe in Jahre 1917. B. Krankheit der Zuckerriibe. 

 [Noteworthy information on the animal enemies and diseases of sugar beets in 1917. [Blatter 



