12: 



rang:c(l from 2 per cent, to ")S per cent. In most of the infested 

 nurseries the iundunt of injury was estimated at from 5 per cent, 

 to 10 per cent. 



Injury io the peach by this borer is always followed by a free 

 exudation of a thick and sticky lluid at the point of injury. This 

 becomes mixed with pieces of bark and the excrement of the borers, 



and dries away 

 to form a more 

 or less brittle 

 g-um, usually 

 most abundant 

 about the base 

 of the tree, at 

 which point the 

 attack is com- 

 monly concen- 

 t r a t e d . As 

 found in the 

 tree these in- 

 sects resemble 

 jufrubs, but when 

 closely e X a m - 

 incd are at once 

 seen to be cater- 

 pillars instead. 

 lOachisaboutan 

 inch long- when 

 full grown, very 

 lig-ht yellow ex- 

 cept the head 

 and the top of 

 the"neck/'both 



of which are brown with smooth and shining- surfaces, the former 

 dark reddish, and the latter very light. There are the usual three 

 pairs of jointed legs on the seg-ments next behind the head, and 

 additional to these the soft legs, or so-called proleg-sof a caterpillar, 

 with rows of small black hooks at the tip. There are five pairs of 

 these prolegs on segments (> to '> behind the head and on the last. 

 The importance of the peach-tree borer from our present point 

 of view is due to the fact that it passes the winter in the active 

 borer stag-e within the infested tree, and is consequently certain to 

 be shipped to the customer if such a tree is overlooked. 



Fit 



I'lii'; I'i'.Acii TKi'i'-. 15()Ki:i<, ;i(iiill innlcs and le 

 iiialfs. (Slini'rrland.) 



