638 EXPERIMENT STATION RECORD. [Vol 40 



Argentina are briefly described and measures for their control indicated. The 

 plants dealt with include different types of Chenopodium, Russian thistle, black 

 oats, and Polygonum convolvulus. 



Weed seeds and impurities in imported seeds [in New South Wales], B. 

 Breakwell (Agr. Gaz. N. S. Wales, 29 {1918), No. 9, pp. 633-638).— A tabular 

 statement is presented showing the percentage of weed seeds and other impuri- 

 ties in the poorest samples of seeds of barley, carrots, cress, clover, alfalfa, flax, 

 and meadow foxtail examined during the year ended June, 1918, together with 

 a list of all the weeds and impurities present in 1,000 samples of agricultural 

 seed. 



Buried weed seeds, W. E. Brenchley (Jour. Agr. Sri. [England], 9 (1918), 

 No. 1, pp. 1-31). — This paper gives a more detailed account of work already 

 noted from another source (E. S. R., 39, p. 239). 



Summary of cooperative experiments in weed eradication. 1912-1917, 

 J. E. Howitt {Ann* Rpt. Ontario Agr. and Expt. Union, 39 (1917) pp. 10-14). — 

 This reports further progress with work previously noted (E. S. R., 39, p. 744). 



HORTICULTURE. 



Allotment gardening. — A complete guide, H. H. Thomas (London and New 

 York: Cassell d- Co., Ltd., 1918, pp. V 111+151. figs. 1*3).— A popular garden 

 guide, dealing especially with British conditions. 



The control of garden insects and diseases, T. H. Parks and W. G. Stover 

 (Agr. Col. Ext. Bui, [Ohio State Univ.], 11, (1918-19), No. 9, pp. 38, figs. 8). 

 This comprises a calendar for the control of the Important Insect pests and 

 diseases of the garden, including spraying formulas and directions for seed dis- 

 infection and fumigation. As far as practical. Ingredients for spray materials 

 are expressed in small quantities suitable for garden purposes. 



Asparagus growing in New Jersey, R. W. DeBaun (New Jersey Stas. Ore 

 99 (1918), pp. 3-22, figs. 15). — A practical treatise on asparagus culture, dis- 

 cussing the preparation of the soil, planting operations, cultural details, ferti- 

 lizers, the control of insect enemies and disease, and harvesting and marketing 

 the crop. 



A variety test of cabbage, C. E. Myers and J. S. Gardner (Pennsylvania 

 Sta. Bui. 154 (1919), pp. 3-30, figs. 11). — In continuation of previous reports 

 (E. S. R., 38, p. 41), a performance record is given of recently tested varieties 

 of eight different groups of cabbage. In all 51 early and 23 late varieties are 

 considered with reference to the source of the seed, number of years to 

 productiveness, earllness, quality, and other characteristics. 



The pollination of fruit in relation to commercial fruit growing, C. II. 

 Hooper (Brit. Bee Jour., 46 (1918), Not. 1468, pp. 18, 14; 1465, pp. 28, 29; 

 1467, p. 45; 1470, p. 73; 1471, pp. 79, 80; 1473, pp. 97, 98; abs. in Intermit. Inst. 

 Agr. [Rome], Interna*. Rev. Set. and Pract. Agr., 9 (1918), No. n, pp. I 

 1330). — A report of the author's investigations relating to the pollination of 

 fruit trees, including lists of fertile and self sterile varieties of apples, pears. 

 plums, and cherries, as well as lists of the different varieties which should be 

 planted together. The author's observations indicate that most of the CXOS8- 

 pollination, especially in Hie case of apples, is done by insects, particularly hive 

 and bumblebees. 



[Progress report of fruit bud studies], F. M. Rolfs (Oklahoma Sta. Rp*. 

 1918, pp. 48—45) . — Studies in fruit bud development were somewhat Inter- 

 fered with during the year by the prevalence of plum " black spot " i i:n, trrium 

 pruni) on the peach, plum, apricot, cherry, and almond trees. A few of the 

 peach varieties were completely defoliated by this organism. Efforts to control 



