588 EXPERIMENT STATION EECOKD. 



horse uianurc and Paris green. In the expin-inients reported })y the 

 author horse manure was found to be the moi-e effective. The bait 

 was prepared so as to contain 1 lb. of Paris green and 1 11), of salt to 

 50 ll)s. of horse manure. 



In a paper on Plant Enviroment and Insect Depredations, F. W. 

 Kane called attention to the value of proper cultural methods, which 

 may be so practiced as to reduce insect ravages to a minimum. The 

 necessity of devising practical remedies available to ordinary farmers 

 and fruit growers was emphasized. 



The three following papers were presented before the Society for 

 the Promotion of Agricultural Science. The Importance of Injurious 

 Insects Introduced from A))road, by E. P. Felt, discussed the intro- 

 duction and distribution of the more important insects,^ gave estimates 

 of the extent of the damage done by a number of them, and presented 

 a classified list of the important species. Notes were also given on a 

 number of beneficial species which have been introduced. 



H. Osborn discussed insect problems in Ohio, giving notes on a 

 number of injurious insects and estimates of the damage done hy them. 

 The total loss of farm and vegetable crops due to insects was placed 

 at 10 per cent. Some of the insects receiving especial attention were 

 the Hessian fly, San Jose scale, cankerworm, and the codling moth. 

 In the discussion of this paper it was stated that some varieties of 

 wheat were found more resistant to the Hessian fly than others, ])ut 

 that it was not always practical to grow the more resistant varieties. 

 Deco}' crops were also mentioned as successful when propeily attended 

 to. The use of lime-sulphur-and-salt wash against the San flose scale 

 in New York was reported l)y W. H. Jordan as very successful in 

 experiments conducted during one season. 



A paper by F. M. Webster, entitled The Use of Arsenate of Lead 

 Against the Codling Moth, was read by title. Experiments on the 

 use of arsenate of lead were conducted by the author in 1!H)1, with 

 results which were considered encouraging. In 1902 practical tests 

 were made by a number of fruit growers in Ohio and Indiana, the 

 results on the whole being considered favorable to the use of this 

 insecticide. In one instance the percentage of wormy apples from 

 sprayed trees was 3.6 and from unsprayed 70.5; in another instance 

 1.4 and 54, respectively; and in a third experiment 6.0 and 69, 

 respectively. 



Before another body L. O. Howard spoke briefly regarding efforts 

 of the Division of Entomology to lessen the damage that insects are 

 doing to agricultural interests, which is estimated at $300,000,000 per 

 annum, and for the control of which the Government spends only 

 $150,000 per annum. For the purpose of classifying the Avork insects 

 are divided into groups, e. g., those affecting field crops, orchard 

 fruits, truck crops, sugar beets, etc. ; those concerned in silk produc- 



