. Annual report of the State Entomologist of Montana . Fig. 5. The Bronze Apple Tree Borer: a, adult weevil dotted portion of sizeline showing leugtli of snout; b, larva; c, pupa—six times natural size. (Chit-tenden, Bulletin 22, New aeries, Div. of Entomology, U. S. Dept. of Agr.,1900). 1. Magadalis acncsccns Lee. 2. Bulletin 22, X. S. Div. Ent., U. S. D. A., page 39. MONTANA EXPERIMENT STATION. 157 found the fungus disease and the beetle at identical spols on appletrees may be explained by the germinating spores of the fungusdisease finding in the punctures into the bark made by the beetlesi
. Annual report of the State Entomologist of Montana . Fig. 5. The Bronze Apple Tree Borer: a, adult weevil dotted portion of sizeline showing leugtli of snout; b, larva; c, pupa—six times natural size. (Chit-tenden, Bulletin 22, New aeries, Div. of Entomology, U. S. Dept. of Agr.,1900). 1. Magadalis acncsccns Lee. 2. Bulletin 22, X. S. Div. Ent., U. S. D. A., page 39. MONTANA EXPERIMENT STATION. 157 found the fungus disease and the beetle at identical spols on appletrees may be explained by the germinating spores of the fungusdisease finding in the punctures into the bark made by the beetlesin depositing their eggs, suitable places for gaining access to theunder layers of the bark. If this be the case then the weevil isthe primary cause and the fungus secondary. Considering what information we now have regarding this borer,it is apparent that in the interests of the apple growers it will be wellto watch for it and become familiar with its habits. The beetle is small, black, and has a snout. See the accompany-ing Fig. 6. Work of the apple tree borer;—a, pupa in its cell;, b, exterior ofpupal cell; c, empty cell; d, parasitic pupa in its cell; e, two empty cells ofparasite; f, beetle and holes made by beetles in their escape—all naturalsize. (Chittenden, Bulletin 22, New Series, Div. of Entomology, U. S. DepLof Agr., 1900). 158 MONTANA EXPERIMENT STATION. THE APPLE TWIG-BORER, i. The apple twig-borer also known as the grape cane borer is anenemy to the grape, apple, pear, peach, plum, forest and shade trees,and ornamental plants. It is especially destructive to the grape. This has been a very common and destructive pest in the statesalong the Mississippi river from Iowa southward. It also occurseastward from the Mississippi river to the coast. In the fall and winter the adults of this insect bore into the twigsoi its host plants as shown at d of the accompanying these stems the beetles hibernate there. It is thus seen
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