1158 EXPERIMENT STATION EECORD. 



The best results in combating brown ants and mealy bugs are obtained from 

 the use of kerosene emulsion prepared according to a formula calling for 2 

 gal. of kerosene, 1 pt. crude carbolic acid, 1 lb. soap, and 1 gal. of water, the 

 stock solution to be diluted in IS gal. of water before use. The emulsion 

 should be thoroughly sprayed between the heart leaves of the plant. When 

 the ant nests are immediately under or around pineapple plants it is best to 

 spray the pests first, forcing the emulsion into the soil. Pineapple plants 

 should not be sprayed when the fruit bud is forming. 



The gipsy and brown-tail moths in New Hampshire, E. D. Sanderson (New 

 Hampshire 8ta. Bui. 136, pp. 93-156, figs. 3-J). — A general historical account is 

 given of the introduction and spread of the gipsy moth in Massachusetts, 

 Rhode Island, Maine, Connecticut, and New Hampshire with particular refer- 

 ence to the work which has been done in New Hampshire in controlling this 

 insect. The life history of the pest is described in detail. 



A similar historical and economic account is given of the brown-tail moth, 

 together with a copy of the New Hampshire law for the control of gipsy and 

 brown-tail moths. 



Papers on deciduous fruit insects and insecticides. Grape root-w^orm in- 

 vestigations in 1907, F. Johnson [U. S. Dcpt. Agr., Bur. Ent. Bui. 68, pt. 6, pp. 

 61-68, pis. 2). — Notes are given on the conditions observed in vineyards in the 

 Lake Erie Valley in 1907. A study was made of the amount of iujui'y done 

 by the grape root- worm during the year under report and experiments were 

 carried on to determine the efficiency of spraying to control this pest. The 

 insecticide work was done at North East, Pennsylvania. The results obtained 

 indicate that a thorough and timely spraying of infested grapevines with 

 arsenate of lead will control the grape root-worm to such an extent that the 

 vineyard will produce a fairly good crop. The application of arsenate of lead 

 should be made as soon as the first beetles appear. All parts of the foliage 

 should be thoroughly covered. In this work about 100 gal. of liquid spray is 

 sufficient to cover an acre. The spray formula recommended by the author 

 calls for 5 lbs. copper sulphate, 5 lbs. of lime, and 3 lbs. of arsenate of lead in 

 .50 gal. of water. 



Papers on deciduous fruit insects and insecticides. Demonstration spray- 

 ing for the codling moth {U. S. Dept. Agr., Bur. Ent. Bui. 68, pt. 7, pp. 69-76).— 

 Demonstration experiments are reported as carried on in Virginia by S. W. 

 Foster, Pennsylvania by F. Johnson, and Ohio by A. A. Girault for the purpose 

 of showing the ease with which the codling moth may be controlled. In Vir- 

 ginia apple trees were sprayed with Bordeaux mixture containing 2 lbs. arse- 

 nate of lead to each 50 gal. A saving of 72 per cent of the crop was thus 

 effected at a cost of 49 cts. per tree and with a net gain varying from $9.2.5 to 

 $11.88 per tree. In Pennsylvania Bordeaux mixture was used containing 3 

 lbs. of arsenate of lead per 50 gal. of water and produced a net gain of $2.75 

 per tree. In Ohio similar experiments gave a net gain of about 95 cts. per 

 tree. 



The pear midge, P. Marchal (Ann. Soc. Ent. France, 76 (1907), No. 1, pp. 

 5-27, figs. l.'i). — During the past few years the pear midge has caused more 

 damage than heretofore, particularly in the vicinity of Paris. The life history 

 t)f this pest is described in detail with illustrations of the injuries caused by it. 

 At least three species of parasites occur upon the pear midge in France, one 

 of which, Tridymus piricola. is described as new. If the orchardist undertakes 

 the destruction of fallen infested fruit in order to control the pear midge, this 

 must be done promptly, otherwise the midges will escape and the operation will 

 have no good effect. A number of other artificial remedies have been tried, 



