1919] DISKASKS OF PLANTS. 845 



Phytopathological report for 1915, P. Makciiai. and G. Aknaid (Win. Agr. 

 [Frunce], Ann. Serv. F.piphytiex, 4 (1915), pp. 31-42).— The portion of this re- 

 port here QOted deals with parasitic and nonparasitic plant disSSSBi and other 

 troubles, including those due to such causes as weather. 



Summary reports of entomological and pathological laboratories (Min. 

 Ayr. [France], Ann. Serv. Fpiphyties, 4 {1015), pp. 343-350 ) .—Very Condensed 

 reports are given from entomological stations at Paris, the Mams, Blois, 

 Beaune, Montpollier, and Bordeaux, and from phytopathologlca] stations at 

 Paris and Cadillac (Gironde). That from the last-named station deals with 

 grape downy mildew, wheat foot disease (Leptospharia serpotffiOAOides), a 

 disease of pea associated with Fusarium vasinfectum (cenidial form of 

 Neocosmospora raxinfecta) and Heterodera sp., a plum disease associated with 

 Monilia cincrca and FJxoascus pruni, and potato late blight (l'hytnphthora 

 infestans). Short lists are given also of various reports of studios on plant 

 diseases and insects injurious to plauts. • 



Operations against plant diseases in Italy, H. Latere {Min. Ayr. [Fnim-i ], 

 Ann. Serv. Kpiphyties, 4 (1915), pp. 76-144, 337-342). — This is an account of 

 the several stations and laboratories dealing with plant diseases in Italy, the 

 principal parasites and other agencies causing loss, and legislative aud other 

 measures in use or in view for the control of plant diseases. 



Administration report of the government mycologist for the year 1917-18, 

 W. McRak (Rpt. Dept. Ayr. Madras, 1917-18, pp. 77-80).— This report Include* 

 a statement regarding the fungus noted on page 852 under the name ol /'/(//- 

 tophthora meadii as attacking Hevea brasiliensis. Experiments have shown 

 that all parts of the tree above ground may be attacked. Control measures are 

 restricted practically to removal of diseased wood and fruits and to protection 

 of the tapped portions of the tree. 



Other diseases of various plants are hriefly noted. 



Mycology and operations against diseases, G. A. D. Stuart (lipt. Dept. Agr. 

 Madras, 1917-18, pp. 17, 18-20). — Brief reference is made to the above work of 

 McRae on the fungus which he has named Phythopthora meadii. other tangos 

 diseases of rubber are under investigation. 



Rice blast (Piricularia oryza?) severely attacked at villages in Tanjore the 

 productive rice variety Korangu Samba, which has been recently introduced in 

 the deltas. Bleeding disease of coconuts is cured by excision of the disease', 

 portion of the stem. Applications of Bordeaux and Burgundy mixtures reduced 

 fungus disease ol grapes in the Salem district. 



Palmyra disease in Godavari and Kistna is found to be usually curable by 

 removal of all infected portions unless the central shoot is attacked. Return 

 outbreaks in previously treated districts have been rather frequent. Mahali 

 disease on areca nuts is aided by local economic conditions hindering proper 

 treatments. The same is true of smuts affecting various cereals which are 

 brietly named. 



Bean rust: Its control through the use of resistant varieties. 1\ D. Frommk 

 and S. A. Winoard (Viryinia Sta. Bui. 220 (1918), pp. 3-18. flys. 9).— Alter de- 

 scribing the effect of bean rust (Uromines w ppc m i ieulatus ) on beans in Vir- 

 ginia, the authors give an account of tests of field and garden varieties for 

 resistance to this disease. Very great differences in resistance were noted, 

 and fcr the control of this and other diseases the authors recommend the 

 use of resistant varieties, selection of clean seed from clean pods, rotation of 

 crops, and avoiding the workiug or picking of beans while wet with dew or 

 rain. 



