162 EXtEKIMEiSTT STATION EECORD. 



hrassicw), cross-striped cabbage wonn {Evergestis rimosalis), and the harle- 

 quin cabbage bug. 



Uuder insects injurious to cucurbits mention is made of the striped cucumber 

 beetle and the southern corn root-worm (Diabrotica 12-in(,nctata) . An account 

 of insecticides and their application concludes the bulletin. 



Observations on Prays oleellus and other insects of the olive in Calabria, 

 G. DKL GuERCio {Atti It. Accad. Econ. Agr. Georg. Firenze, 5, scr., 6 {190!)), 

 No. 1, pp. 31-99, 2ils. Jf). — Prays oleellus is here considered at length (pp. 33- 

 81). Other species discussed include Parlatoria proteus, Aspidiotus hederce, 

 Lecanium olew, Ceroplastes rusci, etc. 



Protection of woodlands in Ireland, A. O. Foebes {Dept. Agr. and Tech. 

 Imtr. Ireland Jour., 9 (1909), No. Jf, pp. 65/f-66Jf, j)ls. 10, figs. 5).— An account 

 of the insects injuring forest trees in Ireland, the nature of their injury, and 

 the practical protective measures that are often necessary to prevent serious 

 loss. 



Spraying for San Jose scale, M. A. Blake and A. J. Fakley (Neio Jersey 

 Stas. Rpt. 1908, pp. 61-63). — The authors report that 675 one-year-old peach 

 trees were sprayed with lime-sulphuB at an expense of $1.83. In this work the 

 barrel pump was used, 3 men being engaged. The outlay for the equipment 

 was $23.70. 



Fumigation of apples for the San Jose scale, A. L. Quaintance ( V. 8. Dept. 

 Agr., Bur. Ent. Bui. S/f, pp. J/S, pis. 2, figs. 3). — Details of investigations con- 

 ducted by the author in cooperation with W. A. Taylor, of the Bureau of Plant 

 Industry of this Department, to determine the possibility of fumigating apples 

 with hydrocyanic-acid and other gases, are here reported. Although the chances 

 of the establishment in new localities of the San Jose scale from shipments of 

 infested fruit are considered by American entomologists in general to be ex- 

 ceedingly remote, in certain European countries the danger has appeared suffi- 

 cient to warrant the enactment of legislation excluding from entry all fruits 

 from America which, on inspection, show the presence of the San Jose scale. 

 Data are given from a report of the chief inspector of the station for plant pro- 

 tection at Hamburg which show that an undesirable amount of scale-infested 

 fruit finds its way into our export shipments, thereby entailing a considerable 

 loss to exporters. 



A detailed description and the plans of a fumigating apparatus constructed 

 for the worlk are given. The experiments conducted are reported under the 

 headings : Strength of gas, length of exposure, package, variety of fruit, injury 

 to fruit, and low temperature. In the fumigation of Baldwin apples loose in 

 baskets all scales were killed with strengths of potassium cyanid at the rate of 

 from 0.1 to 0.5 gm. per cubic foot and exposed 45 minutes, and also at the rate 

 of 0.2 gm. per cubic foot with periods of exposure ranging from 20 minutes to 3 

 hours. In ho instance was there injury to the fruit. 



Under the package series it is reported that all insects were not with cer- 

 tainty killed, except in the case of fruit in boxes, wrapped and unwrapped, and 

 in barrels in which each head had been pei'forated with numerous auger holes. 

 The only variety of apple used in the tests showing gas injury was the Rhode 

 Island Greening. Observations made at different times on fruit fumigated in a 

 dry, moist, and wet condition showed that its condition in this respect was im- 

 material. Fumigation of scale-infested apples in a local cold storage plant with 

 a temperature of 30° F. showed that adequate diffusion of the gas occurred, 

 killing all of the scale insects without injury to the fruit. The treatment of 

 scale-infested fruits with carbon bisulphid in strengths varying from 0.069 to 

 1.81 cc. per cubic foot for a period of 3 hours failed to kill the scales to any 

 extent. 



