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Gillette (C. P.) & List (G. M.). Sixth Annual Report of the State 

 Entomologist of Colorado, for the year 1915. — Office of State Entomo- 

 logist, Fort Collins, Circular no. 15, June 1915, 44 pp. [Received 

 22nd November 1915.] 



This report includes extracts from the annual reports of the county 

 horticultural inspectors. Many potatoes coming from Texas and 

 California were infested by the potato tuber moth [Phthorimaea 

 operculella]. It is doubtful whether this pest would become serious 

 under Colorado climatic conditions. In Boulder county the most 

 injurious pest is the codling moth [Cydia 'pomonella]. The chief 

 difficulty in control is the fact that almost every family has a few trees 

 which are wholly neglected and become breeding places for all pests. 

 In Mesa county the best results against the codling moth appear to 

 have been attained with six applications of spray. It is believed that 

 soil fumigants applied in the dormant season would control the woolly 

 aphis [Eriosoma lanigerum] in Mesa county. Satisfactory results 

 were achieved with soluble oil against the leaf-roller in Pueblo county. 



Colorado's Amended Pest Law. — Office of State Entomologist, Fort Collins, 

 Circular no. 16, August 1915, 8 pp. [Received 22nd November 

 1915.] 



The Pest Inspection Act of 1911 passed by the Colorado General 

 Assembly has been amended in 1915 in order to make it more effective 

 from the resident land-owner's standpoint. Under the old law the 

 formation of a " pest district " required a petition of the majority of 

 the acreage within a township, or an area not exceeding 36 milee. 

 The new law requires a petition bearing the signatures of the majority 

 of resident land-owners, instead of a majority of acreage. A County 

 Inspector may now destroy pests upon the property of those persons 

 who neglect to carry out his orders and the cost incurred may be 

 charged to them. The State Entomologist has jurisdiction within this 

 law, the full text of which is given. 



Smith (L. B.). Control of the Colorado Potato Beetle [Leptinotarsa 

 decemlineata, Say). — Virginia Truck Expt. Sta., Norfolk, Bull, 

 no. 14, 1st January 1915, 19 pp., 5 figs. [Received 24 November 

 1915.] 



This is a summary of the field work during 1914 on spraying experi- 

 ments against Leptinotarsa decemlineata, Say (Colorado potato beetle) 

 in Virginia. As a spray for potatoes, Bordeaux mixture (4-6-50), 

 together with arsenate of lead paste from 4 to 6 lb. and 1 lb. of Paris 

 green to 50 U.S. gals, of mixture, has not yet been surpassed by any 

 of the proprietary insecticides now in use, either from the standpoint 

 of efficiency or of economy, for the farmer who grows 5 acres oi more 

 of potatoes. In this case it will pay to have the proper facilities for 

 the mixing of Bordeaux and the application of sprays. For those 

 who grow less than 5 acres, it may be more economical to use some 

 prepared spray material, especially as the facilities for mixing at home 

 are likely to be poor, thus making a spray of mediocre quality. One 

 application of Paris green and lime dust should be made at the time 

 the first green shoots are showing, this will protect the young potato 



