April, '09] JOURNAL OF ECONOMIC ENTOMOLOGY 141 



different plots which are to be compared. Experiments in the control* 

 of the Codling Moth have now been made for a qnarter centnry. at a 

 large cost, yet many of the most elementary matters concerning the 

 effect of such treatment are still unsolved. Unless more careful and 

 elaborate methods of experimentation are adopted, they will remain 

 befogged by the mass of data based on single trees and "sample 

 counts," while time and money are being wasted Avithout adding to 

 our knowledge. 



At the present time, when increased emphasis is being placed upon 

 agricultural research of a high order, w^e must see to it that the meth- 

 ods we employ are of as undoubted scientific accuracy and thorough- 

 ness as possible. Otherwise we need not complain if funds for investi- 

 gation are given to investigators in other sciences in which better 

 methods have been developed, whereby more accurate and incontest- 

 able results can be secured. Let us give more attention to our methods 

 of work and let us remain agnostic until we have secured such a mass 

 of conclusive evidence as will enable us to detinitelj^ establish the 

 facts. By so doing we will avoid burdening each other and the pub- 

 lic with opinions, so many of Avhicli have in the past been quickly 

 refuted, and which tend to lessen confidence not only in the individ- 

 ual investigator, but in the science he represents. 



President Forbes : Discussion of this paper is now in order. 



]\Ir. Taylor : ]\Ir. President, I am more or less familiar with the 

 methods of Codling Moth spraying in the West, and also in the East, 

 having had some experience in fighting this insect in Colorado and in 

 the Ozark district in ^Missouri, and I must say that the difference of 

 opinion that has sprung up between eastern and western methods is 

 somewhat exaggerated. After all, I don 't think there is such a differ- 

 ence in conditions between the West and the East, and I believe that 

 the principal difference in opinion is not so much a difference in the 

 entomological value of the sprays as it is a matter of expediency in 

 applying them. For instance, the people of the West who are equipped 

 with power sprayers contend that the spraying with power outfits at 

 a high pressure is much better than spraying with barrel pumps, with 

 pressures of 100 or 125 pounds. In an experiment that I conducted in 

 the Grand Valley in western Colorado with a power outfit we sprayed 

 a row of trees at 100 pounds pressure and on the next row we used 180 

 or 200 pounds. We found that we sprayed more trees with the liigh 

 pressure and that we sprayed out our tank in a much shorter time. 

 That is the point that the orchardist is after. He wants to get his 

 work done quickly and spray as many trees as possible. I think that 



