Insects Injurious to the Apple, 



127 



AN EMPHTTUH SI'.! ATTACKING THE APPLE. 



A single case ()iil\' of this insect attack lias l.een Ijroiight to my 

 notice, and 1 can find no reference to it in literature* A well- 

 known grower, Mr. IF. K. (letting of Ashtield Tark, Itoss, wrote in 

 XoveniLer: "I was startled to find ,a nnmber of my youn- aiijili' 

 trees with a round hole in the top of lust year's '^.jTowth (!.<■.. wliere 

 branches A\ere pruned to). On examination I found that gr(:>en 

 caterpillars were doing the damage. This is (juite new tn me, and 1 

 am afraid ma\' be a serious pest." 



The culprit iiroved to be one of the Sawtlics belonging ti.i the 

 geuus Einpliiji 116. 



The ]ar^-a■ enter the pith cavities to pupate, and in doing so the>- 



.', liirva /// situ 



vnv. Ai'i'ij'; i:,M['ii'i rrs {Kn'phiihfx :<^ 



'. UlltllilHT' Mf tllMIK-l ; rf. t-XrlLincllt. 



/■■, r. Thchnhh 



>. -). 



may lie the cause ol' much damage, as many of them seemed to bore 

 down lielow the piiint of origin of the side shoot, and this not only 

 weakens its growth, but may destroy it entirely. Mr. Getting 

 noticed that they preferred to attack the main shoot, doubtless owing 

 to the pith cavity lieing larger. Their preseuce may easily lie 

 detected by the " frass " and granular pith thrown out, which collects 

 on the pruned surface as a fine dust (Fig. 102 a). 



Mr. Getting's further oljservations are as follows : " After it has 

 made the hole sufficiently deep, it turns round with its head to\\'ards 



* The following account is taken from my Ueport on Economic 7jO<Ao<;\ for 

 the year ending April 1st, 1905. 



