49 



The Currant Borer (Sesia tipuliformis L.), appeared suddenly in our 

 currants last season and destroyed many canes, both in the black and red 

 currants. The moths emerge late in May and June and eai-ly in July (two 



Work of the Currant cane-borer, a. exit-hole: b, larva: c, exit-hole: d, pupa; e. pupa projectlnR from the exit-hole. 



pupae were found July 9th) and lay their eggs at the buds on young wood. 

 The caterpillar bores into the stem and down through the pith, leaving a 

 black tunnel. It remains in the wood during the winter and continues 

 operations in the spring. When mature the larva cuts an exit hole through 

 the wood and pupates near the opening. The chrysalid often wriggles until 

 I. P.— 4 



