DISEASES OP PLANTS. 455 



sweet corn was alternately planted with rows of cucumbers. The 

 unshaded plants made considerably better growth than the shaded 

 ones, and there was no appreciable difference in the amount of anthrac- 

 nose and only a slight difference in the amount of downy mildew. Con- 

 sequently it seems improbable that shading can be advantageously 

 employed as a preventive of downy mildew. 



The author reports the presence of the downy mildew (Plasmopara 

 cubensis) on the winter crook-neck squash (Cucumis moschata), this 

 being a new host plant for the fungus. 



Suggestions on spraying, H. P. Gould (New York Cornell Sta. 

 Bui. 144, pp. 579-586). — Some notes on spraying are given to supple- 

 ment the information contained in previous bulletins of the station. 

 The summary is as follows: 



"Many of the recently introduced insecticides and fungicides are no better than 

 some of the older and better known materials, and they arc sometimes inferior to 

 them. Arsenite of lime prepared according to the directions of Dr. Kedzie seems 

 to be the best substitute for Paris green. Powdered Bordeaux mixture has not given 

 good satisfaction with us. Certain modifications of Bordeaux as proposed by Hal- 

 sted may possess some advantages over the common formula for special purposes. 

 In spraying for insect foes, the kind of material used must be governed by the feed- 

 ing habits of insects for which the treatment is made. Bordeaux mixture seems to 

 lessen the ravages of the striped cucumber beetle, as also the flea-beetle. Thorough- 

 ness in spraying is one of the most important elements of success and one often dis- 

 regarded. Spray at the proper time. Under no conditions spray with rjoisons when 

 fruit trees are in full bloom." 



The present status of the biology of rust fungi, H. Klebahn (Bot. Ztg., 56 

 ( 1898), II, No. 10, pp. 145-15S). 



Recent investigations on grain rusts and other injurious fungi, A. B. Frank 

 (Nachrechten aus Klub. Landw. Berlin, 1S9S, No, 3SS, pp. 3415-341S ; 3S9, pp. 

 3421-3424). 



Notes on Puccinia lycii, P. Magnus (Redwigia, 37 (1S9S), Sup., No. 3-4, pp. 

 91-93, jigs. 6). 



On the present status of the cereal rust question, J. Eriksson (Per. Dent. Bot. 

 Gesell, 15 (1897), pp. 183-194; abs. in Ztachr. Pflaneenhrank., 8 (1898), No. 3, pp. MS, 

 109). — The substance of this article has already appeared (E. S. E., 10, p. 316). 



Recent observations of Eriksson on the rusts of cereals, C. B. Plowright 

 ((lard. Chron., 3. set:, 24 (1S9S), No. 015, pp. 269, 270).— Paper read before the British 

 Mycological Society, September 19, 1898. 



The asparagus rust, F. A. Waugh (Gard. Chron., 3. ser., 24 (ISOS), No. 607, p. 

 120). — A brief account is given of Puccinia asparagi in the eastern United States. 



Fungus diseases of hollyhocks, B. D. Halsted (Amer. Florist, 13 (1S9S), No. 528, 

 pp. 1342, 1343, fig. 1). — Brief notes are given of Cercospora althwina, Phyllosticta 

 althwina, Colletolrichum alt-haw, and Puccinia malu acear urn. 



Chrysanthemum rust, B. D. Halsted (Amer. Florist, 13 (1898), No. 522, p. 121.', 

 Jig. 1). — This disease is popularly described, and a warning against it is given to all 

 growers. 



Chrysanthemum rust, G. Massee (Gard. Chron., 3. ser., 24 (1S9S), No. 615. p. 269, 

 fig. 1). — Notes are given of Puccinia hicracii, its occurrence and means for combating 

 it. Keprinted in Amer. Gard., 19 (1898), No. 200, p. 727. 



"Wood ashes not an apple scab preventive, F. H. Hall (New VorJc state Sta. 

 Bui. 140, popular ed., pp. 6). — This is a popular summary of Bulletin 110 (see p. 452). 



