502 THE RASPBERRY GRUB. 



§ IX. — DISEASES OF THE RASPBERRY. 



The Raspberry Grub — Tinea corticella : Linn. 

 This insect, in the larva state, attacks the cane. 

 It commences in the bnd that is to produce fruit, 

 which, from its tenderness, is a very acceptable 

 meal. It then consumes the major part of the in- 

 side of the bearing-stalk, which wilts and dies. By 

 pinching the wilted bud and stalk vigorously be- 

 tween the fingers, the grub may be killed. It is 

 about a quarter of an inch in length, of a scarlet 

 color, and has a black head, with one longitudinal 

 light line over the centre. The first segment has 

 two double, black spots, with very few hairs ; and 

 is largest in the middle of its body, which is fur- 

 nished with sixteen legs. The first three pairs are 

 upon the first three segments. There are then four 

 pairs of ventral legs, and one pair of anal pro-legs. 

 By the first part of June the caterpillar will have 

 accomplished all the injury he will do ; then it 

 becomes a chrysalid among the dead foliage, and 

 appears in about a fortnight as a moth. 



The fore wings of the moth are brown, covered 

 with livid yellow spots. The hi*nd wings have no 

 spots. The head has a great many yellow hairs 

 covering it. The life of the moth is only about a 

 month or six weeks in length, during which time it 

 deposits its eggs upon the young shoots. They soon 



