292 ANNUAL REPORT OF THE Off. Doc. 



PROF. WATTS: I stated that (iiiantity should go before quality. 

 What is the use of my growing 250 barrels of Early Summer, when 

 Successiou will make at least 300 barrels per acre on soil of moder- 

 ate fertility. 



MR. SCHWARZ: If Watts can grow plants in a half-inch of soil 

 it is more than I can do. 



PROF. WATTS: The plants do not grow in the soil alone but 

 mostly in the manure under the soil. 



The CHAIRMAN: We have a very interesting topic and a very 

 able man to treat it: ''Insect Prevention." I will now introduce 

 Professor H. A. Surface, who will discuss the subject. 



Prof. Sill face y)n'stM!tcd tlie following paper: 



iSSKCT PREVENTION. 



By Prof. H. a. acTRFACE, Economic Zoologist, Harrishiirg, Pa. 



In avoiding the ravages of insects it is as true, as in preventing 

 other losseS;, that '"an ounce of prevention is worth a pound of cure." 

 It is possible by practicing certain methods to prevent the occur- 

 rence of many kinds of insects, some of which may never be remedied 

 after they once appear. An example of this is the Hessian fly. 

 There is no known remedy for this after once present in the wheat, 

 although it is possible by two or three methods to prevent the occur- 

 rence of this insect. 



The difference between remedy and prevention^ therefore, is this: 

 A remedy is a means that is applied to become rid of a pest or trou- 

 ble after it is present; while a prevention is to be regarded more as a 

 means of insuring against the possibility of its occurrence. It is 

 easier to prevent the appearance of many insect pests than to remedy 

 them, and it is also more certain and satisfactory. No one means 

 of prevention will ever be found effective, but if the various methods 

 that we here outline be closely follow^ed, it is evident that combina- 

 tions will result satisfactorily. 



For system in treating the subject, it is here divided into four 

 iections. In the first we deal with farm practice^ which means good 



