280 EXPERIMENT STATION RECORD. 



[ Monthly bulletin of the Division of Zoology] , II. A. Surface (Pennsylvania 

 State Drpt. Agr. Mo. Bui. Div. Zool, ..' (1904), No. 4, pp. 99-128,pl$. 2).— Practical 

 remedies are suggested for insect pests which are most prevalent in August, and notes 

 arc given on mosquito bites, bee stings, insects as carriers of disease, shade-tree pests, 

 bird preservation, etc. 



[Monthly bulletin of the Division of Zoology], II. A. Surface (Pennsylvania 

 State Dept. Agr. Mo. Bui. Div. Zool., .' I 1904), No. 5, pp. l.: 1-160, figs. 5).— Brief notes 

 are given on practical measures for controlling insects and fungus diseases of various 

 crops, together with short accounts of spraying apparatus, inspection of nurseries, 

 rearing insects, etc. 



Nocturnal moths and lantern traps, J. A. Sobral ( /)'"/. Agr. S&o Paulo, 5. ser., 

 1904, No. 6, pp. 269-271). — As a resultof various tests with lantern traps for the pur- 

 pose of catching injurious night-flying moths, the author recommends that such lan- 

 terns be placed not farther apart than 25 meters. 



The use of hydrocyanic acid as an insecticide, A. Richon I Rev. Hbrt. [Paris'], 

 76 (1904), No. 15, pp. 358-360). — Detailed notes are given on the effect of this gas upon 

 various insects and plants. Thrips and various species of plant lice, red spider, and 

 various caterpillars were destroyed by doses varying from 1 to 3 gin. of cyanid of 

 potash per cubic meter of space applied for periods of from 20 to 40 minutes. Some 

 delicate plants were very much injured by the use of 3 gm. of cyanid of potash per 

 cul lie meter of space. With the observation of proper precautions, however, this 

 remedy is considered safe as well as very effective. 



Disinfection of greenhousesby hydrocyanic acid, Costa ntin (Rev.ITort. [Paris'], 

 76 (1904), No. 8, pp. 191, 192). — Formulas are given showing the required amounts 

 of cyanid of potassium, sulphuric acid, and water in the development of hydrocyanic 

 acid of the proper strength to destroy injurious insects without injuring ordinary 

 greenhouse plants. 



The author finds that the amount of cyanid of potassium may vary from 2\ to 3£ 

 gm. per cubic meter of space, according to the delicacy of the plants to be fumigated. 

 It was found that most plants are unharmed by these strengths if kept dry just before 

 and during the process of fumigation. Plant lice, thrips, red spider, mealy bugs, 

 and various species of scale insects were successfully destroyed by one fumigation. 

 The efficacy of fumigation with hydrocyanic acid was' considerably superior to the 

 use of nicotine or fumigation with tobacco. 



Report of the inspector of fumigation appliances, 1903, P. W. Hodgetts 

 (Toronto: Ontario Dept. Agr., 1904, pp. 1~)- — A brief outline is presented of the con- 

 ditions observed in nurseries and orchards in various parts of Canada with reference 

 to infestation with San Jose scale. 



Infested nurseries are inspected and fumigated in the spring and fall. The formula 

 for the development of hydrocyanic acid includes 1 ounce cyanid, 1 fluid ounce 

 sulphuric acid, and 3 fluid ounces water per 100 cubic feet of space. A copy is given 

 of an act passed for the prevention of the spread of San Jose scale, together with reg- 

 ulations based on this act for the fumigation of nursery stock. 



Preparation and use of kerosene emulsion, F. Sherman, Jr. (North Carolina 

 Dept. Agr., Ent. Circ. 10, pp. 6). — Brief notes on the formulas for the preparation of 

 kerosene emulsion, with an account of the proper methods of preparing, diluting, and 

 applying this insecticide. 



Fumigation of nursery stock. Inspection laws of other States, W. Newell 

 (Georgia State Bd. Ent. Bui. 11, pp. 23, figs. 7). — The regulations of the Georgia 

 State Board of Entomology regarding the fumigation of nursery stock are briefly 

 outlined, with notes on fumigation, apparatus, chemicals, construction of fumigating 

 houses, etc. Formula? are given for computing the amount of chemicals required 

 for given spaces. The requirements of various States with regard to fumigation are 

 also discussed. 



