536 EXPERIMENT STATION RECORD. [Vol.40 



The usual statistics relative to the imports of forage plant seeds permitted 

 entry into the United States are included in each of the two numhers. 



Alfalfa dodder in Colorado. W. W. RoBBnra and G. E. Egginton (Colorado 

 Sta. Bui. 2',8 (1918). pp. 15. figs. S). — This pest, said to have originated largely 

 from three widely separated localities in the State, is described and its distri- 

 bution, spread, and methods of eradication indicated. All the alfalfa-growing 

 sections of Colorado were found to be more or less contaminated. Cuxruta 

 planiflora. C. arvensis, and C. iiulrrora have been identified as attacking alfalfa. 

 Dodder is said to be disseminated through impure seed, irrigation water, hay, 

 and manure. 



The exclusive u«e of cleaned and dodder-free alfalfa seed is urged. C. plani- 

 flora and C arvensis being removable by the use of power-driven mills, hand 

 mills, or sieves. For small infested areas, cutting and burning the plants, fol- 

 lowed by hoeing to a depth of from 2 to 9 in. every few day-- for several weeks. 

 is recommended. Where extentive areas are involved, however, it is suggested 

 that the crop be cut for hay before the dodder seed-. or if seed has already ma- 

 tured, that ii be cot and burned, the area then being plowed and kept in culti- 

 vated crops for seven as. 



Weed-control experiments in 1917. I.. If. K\\n-miM (Tid»$kr. sTorsfee 

 Landbr., 85 (19f8), No. 8, pp. 991 .';?).— The experimental results of different 

 methods of weed control ai a in tables and briefly discussed. 



The use of the weeder <m oats before the plants were above ground gave a 

 profitable Increase in yield of grain and straw, in other tests sulphuric and. 

 iron sulphate, and cyanamid were used f><v the control of weeds in fields of oats, 

 wheat, barley, potatoes, turnips, and kohl-rabt. The sulphuric acid was applied 

 in 3.5 to 1 per cent solutions and the <\ anamid was used as a dust spray. In all 

 instances the use of these substances controlled weed growth to such an extent 

 that the resulting increases in yields proved profitable, it is pointed out that 

 especially with oats the cyanamid also had a perceptible fertilizing effect 



The weeds of western Pennsylvania. T. B. KmcH (Trillin, V". J (19H-15), 

 pp. 11-94).- The author presents a check list of weeds occurring in 31 counties 

 in western Pennsylvania, but limited to those specimens actually on record for 

 Allegheny County in the herbarium of the Carnegie Museum (Pittsburgh). 



HORTICULTURE. 



Food gardening: for beginners and experts. II. V. Davis [London: 0. Bell «£ 

 Sons, I. til.. 1918, J. <''.. rev. and oil., pp. VIII+188, ".»>. 12).— A small treatise 

 on vegetable irrowing in which the subject matter i> presented tinder the follow- 

 ing headings: An intensive cropping rotation to produce food essentials, an ad- 

 ditional rotation to produce some additional food, various gardening matters, 

 and how to use the food grown in the garden. 



The food-producing garden. II. A. Dai (London: \l>thu<ii if Co., Ltd., 1918, 

 pp. I C-f-98).— A popular treatise on vegetable and ornamental gardening in the 

 open and under glass. Including also chapters on keeping poultry, rabbits, bees, 

 pigs. etc. 



The market gardener: Economic production of vegetables for the market 

 (Moraicher: Production Economique 'lis Legumes pour la Vente, Paris: Libr. 

 Larousse [1918], />/' / s - do*. 86), A small treatise on market garden practices, 

 with special reference to French conditions. 



The inheritance of seed coat color in garden beans, .1. K. Sn\w and J. It. 

 Nokton (Massachusetts Sta. Bui. 186 (1918), ps ;>. — The work her. 



corded was continued over a period of eight years. Twenty-one varieties of 

 garden beans were used in making over 120 different crosses, Involving more 



