64 EXPERIMENT STATION RECORD. 



sweet corn hy a l)rigliter color, lower thermal death point, and different characters 

 of growth. 



On the coloring and spotting- of rose leaves, C. Wehmer {GurtniJliora, 49 

 {1900), NoH. .9, pp. 225-^29; 10, pp. 262-2(;7, ph. i-) .— The author describes the vari- 

 ous causes which produce discoloration of rose leaves. The different categories 

 described are tho.se due to parasitic organisms, to physical influence of the atmos- 

 phere, and to chemical influence of atmosphere, the normal autumnal change of 

 color, and changes which are brought al)Out by soil influences, drought, etc. The 

 different injuries are described at some length and suggestions given for their preven- 

 tion. The parasitic diseases mentioned are those caused by Ai^teroma radiosum and 

 Phrar/mi'Iiiini ftiihr-nrticivm. 



A nematode disease of clematis, J . f ' n i i-fi,( )T {Srma ine Hart. , 1900, pp. 5.W-537 ). — 

 Descril)es attack.-^ <>f Ilctfrixlem railiriculd. 



Concerning a bacteria-like fungus which destroys nematodes, G. Lager- 

 HEiM (Bihang Srenska Vetensk Ahid. Hdiidl., 26 [1900), No. 4; "'«• m Bot. CenthL, 85 

 {1901), No. 9, pp. 282, 283). — A description is given of a fungus which resembles 

 Actinomyces, that has been found parasitic; upon Tylenchm agroi^tidix in the flowering 

 clusters of Poa alpina. The fungus seems very destructive to this nematode, and it 

 is probable that it will prove destructive to others. Experiments are to be conducted 

 to ascertain this fact. 



Fungicides {Soidh Carolina Sla. Bid. .57, pp. i6).— Notes are given on the use of 

 fungicides for the prevention of various diseases of 'plants, together with formulas 

 and directions for the application of a number of the more common fungicides. 



Copper and sulphur in plant protection, J. E. Weiss (PrrJ./. Bl. Pfianzemclintz, 

 1900, No. 8, pp. 00-02). 



Bordeaux mixture with linseed oil, Condeminal {Rev. Vil., 10, p. 765; aim. in 

 Ann. AgroiK, 26 [luno), No. 4, p. 216). — The formula is given for Bordeaux mixture, 

 in which 15 to 20 gm. of linseed oil to each kilogram of lime is added. The adhesive 

 property of the Bordeaux mixture is said to l)e C(>nsideraV)ly increased. 



Suggestions for an international phytopathological commission, J. Eriks- 

 son {Landt. Akad. Handl. Tid.^kr., .39 {1900), No. 5-6, pp. 361-368). 



ENTOMOLOGY. 



Thirty-first annual report of the Entomological Society of Ontario, 1900 



{Bpl. Ontnrii) Enl. Soc. 1900, pp. 112,_p'g.<<. ./';) .—Tiiis rei)ort contains the proceedings 

 of the thirty-seventh annual meeting <(f the Entomological Society of Ontario, held 

 in London, Novend)er 13, 14, and In, 1900, and the proceedings of the second annual 

 meeting of the Northwest Entomological Society, held at Laeombe, All)erta, North- 

 west Territory, January 16, 1901. -' 

 A discussion of the San Jose scale proljlem was given by G. E. Fisher (pp. 26-29). 

 Whale-oil soap and kerosene were found to be somewhat unsatisfactory remedies for 

 this insect. Crude petroleum gave most ))eneflcial results. Trees were freed from 

 the scale and case l)earers and many other insects were destroyed by the use of a 25 

 or 30 per cent mixture of crude petroleum and water. The annual address of the 

 president, T. W. Fyles (pp. 29-34) was devcjted to a discussion of the beneficial 

 action of insects toward plants. W. Lochhead (i)p. 34-37) called attention to the 

 necessity of making a systematic .«tudy of the forest insects of Ontario. F. M. Webster 

 made a report on experiments in protecting apples from the attacks of the second 

 brood of codling moths (pp. 37, 38). Two trees were selected in the center of an 

 orchard, sprayed on the 22d of June, and one was covered with a netting on the next 

 day. From the covered trees 627 apples were obtained, of which 466 were sound, 

 while from tlie uncovered tree 1,514 apples were obtained, of which only 452 were 

 sound. 



