334 PLUM. 



course to be advised is to cut them down as soon as they are 

 found to be infested, and to burn the part containing the 

 beetles. It is no waste, for in the case of young trees the 

 beetle-borings are rapidly fatal. 



For treatment to prevent beetle attack to the growing trees, 

 the only generally available measures appear to be those 

 suggested by Mr. J. Fletcher, Dominion Entomologist of 

 Canada, for use in the Nova Scotia Apple orchards, namely, of 

 coating the trees with some wash or mixture which will not 

 hurt the bark, but will prevent the beetle getting in or getting 

 out. One application advised for trial is a thick coat of white- 

 wash with some Paris-green in it. 



Another is the thick soft-soap wash known as the " Saunders' 

 Wash," thus noticed : — " Soft-soap, reduced to the consistence 

 of a thick paint by the addition of a strong solution of 

 washing-soda in water, is perhaps as good a formula as can be 

 suggested ; this, if applied to the bark of the tree during the 

 morning of a warm day, will dry in a few hours and form a 

 tenacious coating not easily dissolved by rain."* 



Where infestation is known to exist in a district, just the 

 same class of measures are useful to prevent its continuance 

 which are in regular use by foresters for prevention of infesta- 

 tion of Pine Weevil and Pine Beetle in woods and plantations. 



I take the information from Herr W. Eichhoff's paper above 

 quoted. 



The Shot-borer frequents stumps or fallen trees of the 

 kinds liable to its infestation, for breeding purposes, and prefers 

 these (where attainable) to healthy growing material. There- 

 fore it is desirable to remove all such material and burn it 

 early, that is, by the beginning of the warm season ; and later 

 on, at the time of summer felling, to remove and burn all 

 infested wood. Further, it answers to set trap wood. These 

 traps are poles of any suitable kind of wood, having one end 

 set in the ground so that they may keep fresh all the longer. 

 These are to be set from spring till autumn, and examined 

 every few weeks, and (if found to be pierced) burnt. New 

 pieces should be set from time to time, as the beetles require 

 Vv^ood with some degree of freshness of sap for their breeding 

 purposes. 



Where wood yards are near orchards it is important to be 

 sure that the timber lying in them is not infested by the Shot- 

 borer, for in such case it is sure to be a centre of fresh 

 infestation. 



Report of ' Entomologist' Department of Agriculture, Canada, 1887, ]•>. 28.. 



