186 



Methods of control that have proved effective include: — (1) The 

 mixing of 1 part lime to 8 parts stored peas by weight ; (2) three 

 successive fumigations in a week with carbon bisulphide (5 lb. to 

 1,000 cu, ft. of space), followed by stacking the peas in well secured 

 bags of closely woven material with tight seams. 



The most important natural enemy is a Hymenopterous parasite, 

 Bruchobius laticeps, Ashm. Though this parasite probably destroys 

 many immature Bruchids, the damage to cowpeas is already done 

 before it can materially reduce their numbers. 



Department of Entomology. — Montana Univ. Agric. Expt. Sta., 

 25th Ann. Rept. for Year ended 30th June 1918, Bozeman, February 

 1919, pp. 159-164. [Received 2nd March 1920.] 



The growth of the entomological department in Montana since 

 its inception in 1896 is outlined, and a list is given of the publications 

 that have been issued. The hfe-histories of many well-known pests 

 have been worked out under Montana conditions and published. 

 Cutworms are a serious pest in fields and gardens; in 1915 it was 

 estimated that about 100,000 acres of winter wheat were destroyed 

 by the army cutworm [Euxoa auxiliaris]. Grasshoppers have appeared 

 in destructive numbers in several locahties and much work has been 

 done in investigating this problem, about 160 species having been 

 collected in the State. 



Special studies have been made of the sugar-beet root aphis 

 {Pemphigtis betae] and it is found that by increasing the number of 

 irrigations and so maintaining moisture content in the soil, these 

 insects are prevented from becoming numerous and the sugar-content 

 of the beets is considerably increased. The lucerne weevil [Hypera 

 variabilis] has not yet been recorded in Montana, but is prevalent in 

 the States to the south, and farmers are requested to be on the watch 

 against its appearance. 



Haywood (J. K.). Report of the Insecticide and Fungicide Board. — 



U.S. Dept. Agric. Washington, D.C., 22nd August 1919, 5 pp. 



[Received 3rd March 1920.] 

 The Insecticide and Fungicide Board was inaugurated to assist 

 the Secretary of Agriculture in the enforcement of the Insecticide 

 Act, the purpose of which is to prevent the manufacture, sale, or 

 transportation of adulterated or misbranded Paris green, lead arsenate 

 and other insecticides and fungicides and for regulating traffic therein. 

 The work of the year ended 30th June 1919 is reviewed. The great 

 increase in the use of these substances has necessitated constant 

 vigilance and has resulted in a material increase in the amount of 

 work which the Board has been called upon to perform. Owing to 

 the enlarged market and the increased tendency toward adulteration 

 the work of the Board requires considerable expansion, which however 

 is not possible with the present appropriation. 



IVIarlatt (C. L.). Report of the Federal Horticultural Board. — 

 U.S. Dept. Agric., Washington, D.C., 1st October 1919, 32 pp. 

 [Received 3rd March 1920.] 

 This report, which covers the administration of the Plant Quarantine 



Act for the fiscal year ended 30th June 1919, includes a fist of the current 



