PEAR AND CHERRY SAWFLY ; " SLUGWORM." '83 



the tree, and if a time was chosen, as at morning or evening, when the 

 flies were torpid, or collected on the leafage, and they were shaken 

 down on tarred boards, something might thus be done to check 

 mischief. 



But besides dusting the grub with caustic powders mentioned above, 

 the surest preventive measure is during winter to skim the surface off 

 the soil beneath trees that have been infested in the summer, and to 

 burn or otherwise destroy it. When the caterpillars are full-fed, they 

 go down into the ground, and there form a little dark coloured cocoon 

 (see fig., p. 79) at a depth of from one to four inches, according to the 

 nature of the soil. With a very little attention, anyone (interested in 

 preserving the crops of Pears) will soon detect the little earthy coloured 

 cocoons containing the caterpillar, or later on, the chrysalis to which 

 it has turned, and from which, if undisturbed, the Sawflies would come 

 out next year. The [/round muat not he dwj so as to risk injury to 

 surface rootage, but if lightly forked, or turned in any way which may 

 just disturb the surface only, the cocoons might be hand-picked, or if 

 found to lie close to the surface, this might be skimmed off, and in 

 either way, if the cocoons are destroyed, much good will be done. 



All of the above methods of prevention have been entered on in my 

 previous observations of this attack, but as the infestation of the past 

 year gave some amount of additional information beyond what is 

 usually brought forward as to the early life-history of the insect, &c., 

 the whole account would be incomplete if remedial measures were 

 only referred to. 



g2 



