10 



destruction of this or other borers, care must be exercised 

 by the operator not to excessively wound or cut the tree. 

 As much damage may be done the tree by careless or inef- 

 ficient manipulation as would have been done by the bor- 

 ers that may have been destroyed in the operation. 



The time above given and the method of work outlined 

 does not, of course, apply to all the various species of 

 borers attacking the different growths in which we may 

 be interested. The general statement, however, may here 

 be repeated that the work of control resolves itself into- 

 the careful cutting out, or probing for, the borer and the 

 destruction of the individual pests and we may further 

 emphasize the fact that the use of the arsenical poisons in 

 such cases offers small hope of any success. 



Certain injurious insects, notably the plum (or peach) 

 curculio (Conotrachelus nenuphar Herbst.), have a habit 

 of dropping to the ground and feigning death w r hen dis- 

 turbed. This habit is taken advantage of to destroy the 

 insect. Sheets of cloth, upon light wooden frames, are 

 placed beneath the affected trees which are then rather 

 violently shaken or jarred. The disturbed insects fall on to- 

 the sheets and are collected from these and destroyed. The 

 work should be done in the early morning when the insects 

 are least active. The jarring process to be at all successful 

 must be begun as soon as the insects are first noted upon 

 the trees and fruit and must be continued until jarring 

 fails to bring down enough to pay for the labor involved. 

 This purely mechanical means of destroying these pests 

 while being fairly satisfactory, so far as it goes, does not 

 fully answer the question of their control. The writer has 

 had occasion to note quite satisfactory results in controll- 

 ing this pest by spraying. In the instance in question, the 

 peach orchard was being sprayed with Bordeaux mixture ta 

 control the "brown rot" (Monilia fructigena.) The Bor- 

 deaux mixture was properly made by dissolving four 

 pounds of copper sulphate (bluestone) in twenty gallons 

 of water and by carefully slacking five pounds of clean 

 stone lime and stirring the milk of lime or lime paste thus- 



