Insects, etc., Injurious to the Plum. 



375 



deposit fresh eggs which give rise to larvte, and from these a third 

 brood may and frequently does appear in September and October. 



[Horace Kniijlit. 

 FIG. 247.— PLUM LEAF SAWFLY (Clilihjis jhkU). 



The last brood are frequently, like the slugworni of the pear, the 

 most noticeable. This autumn brood of larvae fall to the ground 

 and remain in their silken cases until the following April or May 

 in the larval condition, when they 

 then pupate. 



Natukal Enemies. 

 Two parasites were reared from 

 this sawfly by Cameron, namely, 

 Ichneutes Tcunitor, Nees, and Try- 

 phon lucidulus, Nees, both of which 

 attack the larvte. 



Prevention and Eemedies. 



The ground beneath trees, which 

 have been infested, should be well 

 prong-hoed in the spring and well 

 trodden down afterwards. It would 

 be better to remove a couple of 

 inches of surface soil during the 

 winter, burn it and replace it later 

 where a tree here and there has 

 been attacked, which, needless to 

 say, could not be done on a large 

 scale. 



FIG. 24S.— LAKV.K OF Cladi 



[F. Edenden. 

 nadl AT WOKK. 



